A management method for preventing peach flesh sponge disease

Abstract

The present application belongs to the technical field of fruit tree cultivation and plant disease prevention and control, and particularly relates to a management method for preventing peach flesh sponge disease. The method comprises the following steps: after the peach flowers wither, the soil moisture is controlled, the relative water content of the soil in the 20-40 cm soil layer is 68%-72%, and the peach leaf surface is sprayed with a calcium sugar alcohol solution and the tree soil is leached with potassium fulvic acid from the 20th to the 25th day after the flowers wither, until 2 weeks before the fruit ripens; 5-8 weeks before harvesting, a diluted solution of a composite physiological regulator is sprayed on the whole peach plant, the composite physiological regulator being composed of potassium fulvic acid, alginic acid, calcium sugar alcohol, potassium silicate, a surfactant and water; and 2-4 weeks before harvesting, the soil moisture is controlled, the relative water content of the soil in the 20-40 cm soil layer is 58%-62%. The management method for preventing peach flesh sponge disease has good sponge disease prevention and control effect.

Description

Technical Field

[0001] This invention belongs to the field of fruit tree cultivation and plant disease control technology, and specifically relates to a management method for preventing spongiosis of peach flesh. Background Technology

[0002] Spongiosis (also known as lignification) of peach flesh is a physiological disorder that seriously affects the quality of peaches. Typical symptoms include dry, soft, and rough flesh texture, which in severe cases becomes spongy or lignified, resulting in loss of juice, extremely poor taste, and a sharp drop in commercial value, sometimes even to zero.

[0003] The disease originates in the mid-to-late stages of fruit growth and development, up to the pre-harvest period. It is primarily caused by a combination of factors, including water stress, nutrient imbalance, and tree physiological disorders, leading to abnormal differentiation of fruit pulp cells (especially cells surrounding the vascular bundles) and abnormal accumulation of cell wall substances (such as lignin). Currently, control of this disease mainly relies on agricultural cultivation management measures, such as water control or the use of exogenous auxins, gibberellins, or polyamines, but these methods have shown poor control efficacy. Summary of the Invention

[0004] This invention aims to solve the problem of poor control of peach flesh sponging disease in existing technologies, and provides a management method for preventing peach flesh sponging disease with better control.

[0005] To achieve the above objectives, the first aspect of this application provides a management method for preventing spongiosis of peach flesh, comprising the following steps:

[0006] One week after the peach blossoms fall, control the soil moisture to keep the relative soil moisture content of the 20-40cm soil layer at 68%-72%. Starting 20-25 days after the blossoms fall, spray the peach leaves with sugar alcohol calcium solution every 10 days and apply mineral potassium humate to the soil around the tree until two weeks before the fruit ripens. Five to eight weeks before harvest, spray the whole plant with a diluted solution of a compound physiological regulator, which is composed of mineral-derived potassium humate, alginic acid, sugar alcohol calcium, potassium silicate, surfactant and water. Starting 2-4 weeks before harvest, control soil moisture to maintain a relative soil moisture content of 58%-62% in the 20-40cm soil layer.

[0007] In one embodiment, the compound physiological regulator is composed of 14%-16% mineral-derived potassium humate, 1.5%-2.5% alginic acid, 6%-7% sugar alcohol calcium, 0.8%-1.2% potassium silicate, 0.15%-0.25% surfactant, and the balance being water, by mass percentage.

[0008] In one embodiment, in the step of foliar spraying of sugar alcohol calcium solution, the sugar alcohol calcium solution contains ≥10% CaO and ≥5% sugar alcohol by mass percentage, and the spraying concentration is 800-1000 times dilution.

[0009] In one embodiment, the sugar alcohol calcium solution contains 10% ≤ CaO ≤ 12% by mass percentage.

[0010] In one embodiment, the dilution ratio of the compound physiological regulator is 500-800 times, and it is diluted with water before use.

[0011] In one embodiment, the diluted solution of the compound physiological regulator is sprayed twice, 5-8 weeks before harvest, with an interval of 10-15 days between the two sprays.

[0012] In one embodiment, the method further includes: for acidic soil with a pH value below 6.0, applying quicklime evenly to the soil within the canopy projection area to make the soil pH value 6.0-6.8, and then shallowly tilling the soil to fully mix the quicklime with the soil.

[0013] In one embodiment, the surfactant is an alkyl polyoxyethylene ether.

[0014] In one embodiment, if the daily maximum temperature is greater than or equal to 35°C for at least 3 consecutive days and the relative soil moisture content is less than 55%, a diluted solution of the compound physiological regulator should be sprayed once 10-15 days before harvest, with a dilution ratio of 1000.

[0015] In one embodiment, the tree canopy is moderately shaded using a shade net with a shading rate of 20%-30% 5-8 weeks before harvest.

[0016] Compared with existing technologies, this application has the following beneficial effects: The method of this application systematically blocks the occurrence of spongiosis in peach pulp from three fundamental levels: water metabolism, cell structure integrity, and lignification metabolic pathway. It avoids excessive vegetative growth caused by excessive water, which competes with the fruit for nutrients, and also prevents insufficient cell turgor pressure and early stress signaling caused by water deficiency, providing a stable water environment for normal cell division and differentiation in the fruit. On this basis, starting from 20-25 days after flowering, the peach leaves are sprayed with sugar alcohol calcium solution every 10 days, and the soil around the tree is drenched with mineral-derived potassium humate until 2 weeks before fruit ripening. The chelating and carrying effect of sugar alcohol significantly enhances the mobility of calcium in the phloem, enabling it to be effectively transported to the fruit tissue, strengthening the cell wall structure in advance, and reducing the risk of abnormal lignification in the later stage. The compound physiological regulators sprayed 5-8 weeks before harvest include potassium humate (mineral-derived), which improves soil aggregate structure, replenishes high-quality carbon sources, and buffers soil pH in both directions, thereby optimizing the root microenvironment and enhancing root vitality; alginic acid, which promotes water and fertilizer retention, chelates nutrients, and activates soil enzyme activity, synergistically enhancing the effects of potassium humate; sugar alcohol calcium and potassium silicate, which strengthen cell wall calcium bridges and silicify, respectively, enhance the mechanical strength and crack resistance of fruit pulp cell walls. Silicon can also induce the activity of peroxidase and polyphenol oxidase in plants, inhibiting the overexpression of phenylalanine ammonia-lyase, a key enzyme in lignin synthesis; and surfactants ensure the uniform spread, penetration, and absorption of the above active ingredients on leaves and fruit surfaces. All of these components are indispensable: without the soil improvement and root activation provided by potassium humate and alginic acid, simple calcium and silicon supplementation will be limited in effectiveness due to low root absorption efficiency; without the cell wall strengthening provided by sugar alcohol calcium and potassium silicate, soil improvement alone cannot directly block the abnormal lignification process of fruit pulp cells. Two to four weeks before harvest, the relative soil moisture content in the 20-40cm soil layer should be brought to 58%-62%. Mild, controlled water stress is then applied. Because the previous intervention has sufficiently strengthened the fruit cell wall structure and activated stress-resistance metabolic pathways, this stress no longer induces sponging; instead, it promotes sugar accumulation and enhances fruit flavor, while also improving post-harvest storage tolerance. Therefore, the above steps are closely linked and have a synergistic effect, collectively reducing the incidence of peach flesh sponging.

[0017] Furthermore, limiting the spraying concentration of the sugar alcohol calcium solution to ≥10% CaO, ≥5% sugar alcohol, and 800-1000 times dilution ensures the optimal balance between calcium supply concentration and absorption efficiency, avoiding ineffectiveness due to excessively low concentrations or fertilizer damage due to excessively high concentrations. Limiting the dilution ratio of the compound physiological regulator to 500-800 times and spraying twice, 10-15 days apart, ensures a continuous supply of active ingredients during the critical window of rapid fruit expansion while avoiding increased labor costs from frequent spraying. Maintaining soil pH at 6.0-6.8, especially for acidic soils, with the application of quicklime for improvement, significantly enhances the bioavailability of micronutrients such as calcium and silicon in the rhizosphere, fundamentally solving the nutrient absorption barrier caused by soil acidification. This allows subsequent foliar spraying of nutrients to form a synergistic "above-ground" supplementation effect with root absorption. Using alkyl polyoxyethylene ether as a surfactant, its excellent wetting, penetration, and rain erosion resistance ensures the stability of the compound physiological regulator's application effect during rainy seasons or when the leaf wax layer is thick. For hot and dry weather, applying a 1000-fold diluted compound physiological regulator 10-15 days before harvest replenishes the tree's stress reserves before adverse conditions occur, preventing sudden water stress from exceeding the fruit's physiological tolerance threshold. Applying a 20%-30% shade net for moderate shading 5-8 weeks before harvest physically reduces canopy transpiration and leaf temperature, decreasing the plant's overall water demand. This, combined with water management, forms a dual "biological-physical" stress reduction mechanism, particularly suitable for areas with high summer temperatures and strong sunlight. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 The illustration shows a cross-sectional comparison of fruits at different stages in an embodiment of this application and a blank control group. Detailed Implementation

[0020] To facilitate understanding of this application, the following description will be more comprehensive and detailed in conjunction with the accompanying drawings and preferred embodiments, but the scope of protection of this application is not limited to the following specific embodiments.

[0021] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of this application.

[0022] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0023] A management method for preventing spongiosis disease in peach flesh includes the following steps: S10. One week after the peach blossoms fall, control the soil moisture to maintain a relative soil moisture content of 68%-72% in the 20-40cm soil layer. Starting 20-25 days after the blossoms fall, spray the peach leaves with sugar alcohol calcium solution every 10 days and apply mineral potassium humate to the soil around the tree until two weeks before the fruit ripens.

[0024] After flowering, during the initial stage of fruit cell division and expansion, maintaining a soil relative moisture content of 68%-72% (slightly moist) is beneficial for the transport of water and nutrients to young fruit, preventing insufficient cell division due to drought or root hypoxia due to excessive moisture. Controlling the soil layer (20-40 cm, the main absorbing root distribution layer) precisely meets the water requirements of peaches. 20-25 days after flowering, during the transition from late-stage fruit cell division to early-stage expansion, begin spraying the peach leaves with a sugar alcohol calcium solution every 10 days, simultaneously applying potassium humate (mineral-derived) to the soil around the tree. Preferably, the sugar alcohol calcium solution should contain ≥10% CaO and ≥5% sugar alcohol by mass percentage, with a concentration of 800-1000 times dilution. Calcium supplementation at this time effectively increases the calcium content in the fruit pulp cell walls, improves cell wall stability, and inhibits later fruit sponging and cracking. Sugar alcohols, acting as chelating agents, can improve the transport efficiency of calcium in the phloem. An 800-1000 times dilution can avoid burning leaves with high concentrations while ensuring effective calcium deposition. Combined with drenching of mineral-derived potassium humate, it can improve the rhizosphere microenvironment, promote the absorption and translocation of micronutrients such as calcium and potassium, and form a synergistic "water-calcium-organic matter" regulation with water control measures, further supporting uniform fruit enlargement and quality improvement. Spraying and drenching should continue until two weeks before fruit ripening to avoid excessive calcium supplementation or adverse effects of moisture fluctuations on flavor accumulation during the ripening period.

[0025] More preferably, the sugar alcohol calcium solution has a mass percentage of 10% ≤ CaO ≤ 12%.

[0026] For acidic soils with a pH below 6.0, apply quicklime evenly within the tree canopy projection area to adjust the pH to 6.0-6.8, and then shallowly till it into the soil to ensure thorough mixing. This adjusts the soil pH, acting as a buffer to balance acidity and alkalinity. Increasing soil pH can inhibit the activity of pathogens (such as Fusarium), indirectly reducing spongiform erosion caused by root diseases. Shallow tilling ensures thorough mixing of the lime with the soil, preventing localized excessive alkalinity.

[0027] S20. Five to eight weeks before harvest, spray the whole plant with a diluted solution of a compound physiological regulator, which is composed of mineral-derived potassium humate, alginic acid, sugar alcohol calcium, potassium silicate, surfactant and water.

[0028] Specifically, 5-8 weeks before harvest, a diluted solution of a compound physiological regulator is sprayed onto the entire peach plant. The compound physiological regulator consists of 14%-16% mineral-derived potassium humate, 1.5%-2.5% alginic acid, 6%-7% sugar alcohol calcium, 0.8%-1.2% potassium silicate, 0.15%-0.25% surfactant, and the balance being water, by mass percentage.

[0029] 14%-16% potassium humate from mineral sources can improve soil structure, promote the formation of aggregates, break up compaction, increase soil organic matter, directly supplement high-quality carbon sources, and enrich soil microbial community structure, promoting beneficial microbial growth. 1.5%-2.5% alginic acid has similar functions to potassium humate from mineral sources, promoting aggregate formation, significantly improving water retention capacity, regulating pH, chelating nutrients, greatly enriching microbial communities, and significantly increasing soil enzyme activity, working synergistically with potassium humate from mineral sources. Foliar spraying can induce the synthesis of endogenous plant hormones, enhance leaf water retention and photosynthetic efficiency, and improve resistance to high temperatures and drought. 6%-7% sugar alcohol calcium ensures sufficient calcium to strengthen cell walls, prevent cracking, and enhance resistance, effectively preventing various physiological diseases caused by calcium deficiency. 0.8%-1.2% potassium silicate can strongly promote root growth, optimize the root system, improve photosynthetic efficiency, improve fruit quality, and improve rhizosphere soil. By regulating physiological metabolism through "mineral-derived fulvic acid + alginic acid", strengthening cell structure through "calcium + silicon", and improving quality through "potassium", multiple targets are used to prevent spongiosis.

[0030] Preferably, the dilution ratio of the composite physiological regulator is 500-800 times, and it is diluted with water before use. The surfactant is an alkyl polyoxyethylene ether.

[0031] In one embodiment, the diluted solution of the compound physiological regulator is sprayed twice, 5-8 weeks before harvest, with an interval of 10-15 days between the two applications. Foliar spraying can chelate nutrients, promote leaf absorption, and enhance photosynthetic efficiency and stress resistance.

[0032] In one embodiment, if the daily maximum temperature reaches or exceeds 35°C for three consecutive days or more, and the relative soil moisture content is below 55%, a diluted compound physiological regulator should be sprayed once 10-15 days before harvest. The dilution ratio is 1000 times. High temperature and drought exacerbate the risk of spongiosis (cell dehydration and obstructed calcium transport). The diluted solution can quickly replenish calcium, potassium, and stress-resistant substances, reducing adverse environmental stress. The 1000-fold concentration is low, preventing phytotoxicity under high temperatures.

[0033] S30. Starting 2-4 weeks before harvest, control soil moisture to maintain a relative soil moisture content of 58%-62% in the 20-40cm soil layer. Reducing fruit moisture content can decrease cell turgor pressure, preventing fruit pulp cells from rupturing due to excessive expansion, while also promoting the thickening of the cuticle layer of the peel and reducing physiological disorders caused by water evaporation.

[0034] Preferably, in one embodiment, the tree canopy is moderately shaded using a shade net with a shading rate of 20%-30% 5-8 weeks before harvest. This reduces the rate of water loss from the fruit, maintains stable turgor pressure in the pulp cells, and indirectly prevents sponging.

[0035] Example 1 This embodiment takes the mid-to-late maturing peach variety 'Crispy Honey Peach' as ​​an example and is implemented at the Xiangzitan Fruit Planting Professional Cooperative Base in Liuyang City, Changsha City, Hunan Province.

[0036] 1. Implementation basis Orchard Overview: The orchard is located on flat land with sandy loam soil and a pH of 6.5.

[0037] Tree condition: 8-year-old healthy tree, Y-shaped pruning, and routine fertilization and watering management.

[0038] 2. Management methods for preventing spongy flesh disease in peaches specifically include: Step 1: Management from post-flowering to core hardening stage (April 1 to June 15) Water management: Starting one week after flowering, use a soil moisture tensiometer to monitor the moisture status of the soil layer at 20-40cm depth, and control the relative soil moisture content at 70%. Drip irrigate once every 8 days, with each irrigation amount being 18 m³ / acre.

[0039] Nutritional Supplementation: Starting 22 days after flowering, apply foliar spray and soil drenching every 10 days. Foliar Spray: Use a sugar alcohol calcium solution (10% CaO, 5% sugar alcohol, by weight percentage), diluted 1000 times, and spray evenly on both sides of the leaves and the surface of the fruit. The amount of solution used is approximately 120 kg per acre. Soil Drenching: Use mineral-derived potassium humate diluted 2000 times, applying approximately 20 kg per tree, evenly to the soil around the base of the tree.

[0040] Step 2: Key interventions during the rapid fruit enlargement period (starting approximately 7 weeks before harvest, around June 25th). Preparation of compound physiological regulator: Prepare the stock solution according to the following mass percentages: Potassium humate (mineral source): 15%; Alginic acid: 2%; Sugar alcohol calcium: 6.5%; Potassium silicate: 1%; Alkyl polyoxyethylene ether: 0.2%; Water: 75.3% Application: Dilute the prepared stock solution 600 times with clean water and use a motorized sprayer to spray the entire orchard thoroughly.

[0041] Number of sprayings and timing: A total of 2 sprayings were applied. The first spraying was on June 25th, and the second spraying was on July 9th, 14 days apart.

[0042] Step 3: Pre-harvest management (the planned harvest period is August 15th, which means it starts on July 25th) Water management: Starting from July 25, irrigation will be controlled to keep the relative soil moisture content at 60% and implement mild water stress.

[0043] Additional treatment: The weather was normal during this period of the year, and there was no sustained high temperature and drought, so no additional spraying was carried out.

[0044] Step 4: Harvesting On August 15, based on the fruit's base color and solid content, fruits that were 80% ripe and of uniform size were selected for manual harvesting.

[0045] Example 2: This embodiment takes the mid-to-late maturing peach variety 'Qingtao' as an example and is implemented in the peach orchard of Yongzhou Cuimi Fruit Industry Development Co., Ltd. in Lengshuitan District, Yongzhou City, Hunan Province. The differences from Embodiment 1 are as follows: Implementation basis: The trees are healthy 7-year-old trees, and the rest (orchard overview) is the same as in Example 1; Step 1 (Management from flowering to core hardening stage): In water management, drip irrigation is carried out every 10 days when there is no effective rainfall, with each irrigation volume being 16 m³ / mu; in nutrient supplementation, sugar alcohol calcium is sprayed at a concentration of 800 times, with a dosage of about 110 kg of solution per mu. The rest (timing, pesticide indicators) are the same as in Example 1. Step Two (Key Intervention During the Rapid Fruit Enlargement Period): The ratio of the compound physiological regulator stock solution was slightly adjusted: 14% potassium humate, 2.5% alginic acid, 7% sugar alcohol calcium, and 75.3% water (the remaining components and ratios remain unchanged); the number of sprays is still 2, the first on June 27 and the second on July 11, 14 days apart, and the rest (dilution ratio, application method) is the same as in Example 1; Steps three and four (pre-harvest management and harvesting) are completely consistent with Example 1.

[0046] Example 3: This embodiment takes the mid-to-late maturing peach variety 'Yingzui Peach' as ​​an example and is implemented in the peach orchard of Mingjian Planting and Breeding Professional Cooperative in Hengnan County, Hengyang City, Hunan Province. The differences from Embodiment 1 are as follows: Implementation basis: Orchard soil pH value 6.8, the rest (orchard topography, tree condition) are the same as in Example 1; Step 1 (Management from post-flowering to pit hardening stage): In water management, the relative soil moisture content is 72%; in nutrient supplementation, sugar alcohol calcium is sprayed on the 32nd day after flowering (late pit hardening stage of fruit), and the rest (concentration and dosage of the agent) are the same as in Example 1. Step 2 (Key Intervention During the Rapid Fruit Enlargement Period): Fine-tune the ratio of the compound physiological regulator stock solution: 16% potassium humate, 1.2% potassium silicate, 0.3% alkyl polyoxyethylene ether, and 74% water (the remaining components and ratios remain unchanged); dilute the stock solution 550 times with water and spray it, while the rest (number of sprays and time) are the same as in Example 1; Step 3 (Pre-harvest management): The relative soil moisture content is controlled at 58%, and the rest is the same as in Example 1; Step 4 (Harvesting) is completely the same as in Example 1.

[0047] Example 4 This embodiment takes the mid-to-late maturing peach variety 'Golden Honey No. 4' as an example and is implemented in the peach orchard of Lvhang Fruit Industry Base in Yongding District, Zhangjiajie City, Hunan Province. The differences from Embodiment 1 are as follows: Implementation basis: The trees are healthy 8-year-old trees with an open-center shape, and the rest (orchard overview) is the same as in Example 1; Step 1 (Management from flowering to core hardening stage): In water management, drip irrigation is carried out once every 9 days when there is no effective rainfall, with each irrigation amount being 17 m³ / mu; in nutrient supplementation, sugar alcohol calcium is sprayed on the 34th day after flowering, with a dosage of about 115 kg of solution per mu, and the rest (concentration of agent, spraying method) is the same as in Example 1. Step 2 (Key Intervention During Rapid Fruit Enlargement): Fine-tune the ratio of the compound physiological regulator stock solution: 15.5% potassium humate, 1.8% alginic acid, and 75.2% water (the remaining components and ratios remain unchanged); dilute the stock solution 580 times with water and spray it, with the rest (number of sprays and time) consistent with Example 1; Step 3 (Pre-harvest management): The relative soil moisture content is controlled at 62%, and the rest is the same as in Example 1; Step 4 (harvesting) is completely the same as in Example 1.

[0048] Comparative Example 1: This comparative example is basically the same as Example 1, with the key difference being that no artificial water management is carried out throughout the process, and the water required for the growth of the tree and fruit is maintained by natural rainfall. The other management measures are completely consistent with Example 1.

[0049] Comparative Example 2: This comparative example is basically the same as Example 1, with the key difference being that: sugar alcohol calcium is not sprayed throughout the process; instead, it is replaced by optimizing soil calcium supply and other nutrient regulation measures. The remaining management measures are consistent with those in Example 1. Comparative Example 3: This comparative example is basically the same as Example 1, with the key difference being that no mineral-derived potassium humate is applied to the soil throughout the process, while the remaining management measures are consistent with those in Example 1.

[0050] Comparative Example 4: This comparative example is basically the same as Example 1, and the implementation basis is completely consistent with Example 1. The core difference from Example 1 is that the compound physiological regulator is not sprayed, and the other implementation conditions are completely consistent with Example 1.

[0051] Blank control group (CK): No treatment was given. This blank control group (CK) was conducted concurrently with Example 1, with identical basic conditions including experimental site environment, soil conditions, and tree condition. Only a blank control treatment was used, as detailed below: In addition to maintaining the routine agricultural operations in the peach orchard, the cultivation and management methods do not take any special preventive measures against peach flesh sponging disease, do not spray exogenous nutrients and regulatory substances such as sugar alcohol calcium and compound physiological regulators, do not carry out precise water control, and irrigation, fertilization and field management are carried out in accordance with the local peach orchard routine model, without adding water monitoring, drip irrigation control and foliar fertilization treatments.

[0052] Harvesting was carried out manually on August 15th, with the harvesting standards remaining consistent with Example 1, selecting fruits that were 80% ripe and of uniform size.

[0053] Effect verification The present invention includes a treatment group (Example 1, Example 2, Example 3, Example 4), a conventional management control group (Comparative Example 1, Comparative Example 2, Comparative Example 3, Comparative Example 4), and a blank control group (CK) without any treatment. Each treatment has 3 trees as replicates, and the average value is taken.

[0054] result: Incidence rate: Observed after the fruit was cut open upon maturity. The incidence rates of spongiosis in the treatment groups of this invention were (Example 1: 1.3%, Example 2: 2.4%, Example 3: 3.2%, Example 4: 3.1%); the incidence rates in the comparative groups were (Comparative Example 1: 10.8%, Comparative Example 2: 35.2%, Comparative Example 3: 43.6%, Comparative Example 4: 45.6%); and the incidence rate in the blank control group (CK) was 81.2%.

[0055] Fruit appearance ( Figure 1 ):like Figure 1 As shown, the fruit of the blank control group (CK) (see Figure 1 The cut surface of the fruit from Group A shows obvious white, dry, spongy tissue. (See also: Fruit from Example 1 of this invention) Figure 1 The flesh of the fruit in Group B (medium) has a bright color and a firm and delicate texture.

[0056] Table 1. Incidence of spongy peach flesh in each treatment group

[0057] The above are merely preferred embodiments of this application. It should be noted that this application is not limited to the above embodiments. For those skilled in the art, several improvements and modifications can be made without departing from the principles of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should also be considered within the scope of protection of this application.

Claims

1. A management method for preventing spongiosis disease in peach flesh, characterized in that, Includes the following steps: One week after the peach blossoms fall, control the soil moisture to keep the relative soil moisture content of the 20-40cm soil layer at 68%-72%. Starting 20-25 days after the blossoms fall, spray the peach leaves with sugar alcohol calcium solution every 10 days and apply mineral potassium humate to the soil around the tree until two weeks before the fruit ripens. Five to eight weeks before harvest, spray the whole plant with a diluted solution of a compound physiological regulator, which is composed of mineral-derived potassium humate, alginic acid, sugar alcohol calcium, potassium silicate, surfactant and water. Starting 2-4 weeks before harvest, control soil moisture to maintain a relative soil moisture content of 58%-62% in the 20-40cm soil layer.

2. The method according to claim 1, characterized in that, The compound physiological regulator is composed of 14%-16% mineral-derived potassium humate, 1.5%-2.5% alginic acid, 6%-7% sugar alcohol calcium, 0.8%-1.2% potassium silicate, 0.15%-0.25% surfactant, and the balance being water, by mass percentage.

3. The method according to claim 1, characterized in that, In the step of foliar spraying of sugar alcohol calcium solution, the sugar alcohol calcium solution contains ≥10% CaO and ≥5% sugar alcohol by mass percentage, and the spraying concentration is 800-1000 times dilution.

4. The method according to claim 1, characterized in that, The sugar alcohol calcium solution contains 10% ≤ CaO ≤ 12% by mass percentage.

5. The method according to claim 1, characterized in that, The dilution ratio of the compound physiological regulator is 500-800 times, and it should be diluted with water before use.

6. The method according to claim 5, characterized in that, Five to eight weeks before harvest, the diluted solution of the compound physiological regulator was sprayed twice, with an interval of 10 to 15 days between the two sprays.

7. The method according to claim 1, characterized in that, Also includes: For acidic soils with a pH value below 6.0, quicklime should be evenly spread on the soil within the canopy projection area to bring the soil pH value to 6.0-6.8, and then shallowly tilled into the soil to ensure that the quicklime is fully mixed with the soil.

8. The method according to claim 1, characterized in that, The surfactant is an alkyl polyoxyethylene ether.

9. The method according to claim 1, characterized in that, If the daily maximum temperature is greater than or equal to 35℃ for at least 3 consecutive days and the relative soil moisture content is less than 55%, spray a diluted compound physiological regulator solution once 10-15 days before harvest. The dilution ratio is 1000 times.

10. The method according to claim 1, characterized in that, Five to eight weeks before harvest, use shade netting with a shading rate of 20%-30% to provide moderate shade to the tree canopy.

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