Foliar fertilizer for papaya planting

Abstract

The invention belongs to the technical field of foliar fertilizers, and particularly relates to a foliar fertilizer for papaya planting. The foliar fertilizer is prepared from the following components in percentage by mass: 1-10% of a bactericidal composition, 30-45% of a soluble plant foliar fertilizer, 3-6% of a dispersing agent, 2-3 parts of a wetting agent and the balance of inert filler, wherein the sterilization composition is formed by compounding oxime-zinc and difenoconazole, and the oxime-zinc is prepared from orysastrobin and zinc pyrithione. The foliar fertilizer disclosed by the invention contains the soluble plant foliar fertilizer and the bactericidal composition, and the soluble foliar fertilizer can provide nutrient substances for the growth of papaya trees and promote the growth of the papaya trees; the bactericidal composition can effectively prevent and remove gray mold on papaya leaves, so that the papaya leaves are prevented from being damaged by the gray mold, healthy growth of papaya trees can be guaranteed, and the papaya yield is increased.

Description

Technical Field

[0001] The invention belongs to the technical field of foliar fertilizers, and in particular relates to a foliar fertilizer for papaya planting. Background Art

[0002] Botrytis cinerea can cause gray mold in many crops including papaya, cucumber, eggplant, papaya, strawberry, grape and other fruit trees, causing the rot of crop flowers, stems, leaves and fruits, affecting the quality and yield of crops. Since the 1970s, producers have mainly used benzimidazole, dicarboximide and carbamate fungicides to chemically control gray mold. However, with the increasing number of times and dosages of these fungicides, single-resistance, double-resistance and even multi-resistance gray mold strains have appeared in many places in my country, which has gradually reduced the control effect of existing chemical agents on gray mold. Therefore, it is necessary to develop new chemical agents.

[0003] Compounding different fungicides is the main strategy to delay further aggravation of pathogen resistance. The inventors found through experimental screening that compounding orysastrobin, zinc pyrithione and difenoconazole has a synergistic effect, which can improve the control effect of gray mold and provide support for the development of new chemical agents. So far, there have been no reports on compounding orysastrobin, zinc pyrithione and difenoconazole.

[0004] In addition, during the papaya planting process, applying foliar fertilizer can provide nutrients for the growth of papaya, promote the growth of papaya, and help increase the yield of papaya. If suitable fungicides are added to the foliar fertilizer, it can not only provide nutrients for plant growth when applying foliar fertilizer, but also effectively prevent and control gray mold on the papaya leaves. It will undoubtedly ensure the healthy growth of papaya trees to a certain extent and increase their yield. Summary of the invention

[0005] The invention aims to provide a papaya planting foliar fertilizer, which can not only provide nutrients for plant growth, but also effectively prevent and treat gray mold on papaya leaf surfaces.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The first object of the present invention is to provide a papaya planting foliar fertilizer, which is prepared from the following components by mass percentage: 1-10% of a bactericidal composition, 30-45% of a soluble plant foliar fertilizer, 3-6% of a dispersant, 2-3% of a wetting agent, and an inert filler supplemented to 100%; wherein the bactericidal composition is compounded from oxime zinc and difenoconazole, and the oxime zinc is composed of orysastrobin and pyrithione zinc.

[0008] Preferably, the mass ratio of orysastrobin to zinc pyrithione in the oxime·zinc is 1-30:10-1.

[0009] Preferably, the mass ratio of oxime·zinc to difenoconazole is 1-9:3-1.

[0010] Preferably, the soluble plant foliar fertilizer is selected from one or more of potassium chloride, potassium nitrate, boric acid, magnesium sulfate and potassium dihydrogen phosphate.

[0011] Preferably, the dispersant is lignin sulfonate.

[0012] Preferably, the wetting agent is eicosyl sulfate or sodium lauryl sulfate.

[0013] Preferably, the inert filler is selected from one or more of bentonite, attapulgite, light calcium carbonate, diatomaceous earth and white carbon black.

[0014] The second purpose of the present invention is to provide the use of the papaya planting foliar fertilizer in preventing and controlling papaya gray mold or fruit tree gray mold.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The foliar fertilizer of the present invention contains both soluble plant foliar fertilizer and a bactericidal composition, wherein the soluble foliar fertilizer can provide nutrients for the growth of papayas such as papayas, thereby promoting their growth; and the bactericidal composition can effectively prevent and eliminate gray mold on the leaves of papayas, thereby protecting the leaves from gray mold, thereby providing a guarantee for the healthy growth of papaya trees and increasing the yield of papayas.

[0017] (2) When the three active ingredients of orysastrobin, zinc pyrithione and difenoconazole in the fungicide composition of the present invention are used in combination, they have a synergistic effect, which can improve the control effect of gray mold, help reduce the application dosage of chemical agents, reduce pesticide residues in crops, and provide support for the development of new chemical agents. DETAILED DESCRIPTION

[0018] The present invention can be better understood according to the following examples. However, it is easy for those skilled in the art to understand that the contents described in the examples are only used to illustrate the present invention, and should not and will not limit the present invention described in detail in the claims.

[0019] Example 1

[0020] A foliar fertilizer for papaya planting is prepared from the following ingredients in percentage by mass: 1.5% of a bactericidal composition, 30% of magnesium sulfate, 3% of calcium lignin sulfonate, 2.5% of sodium lauryl sulfate, and white carbon black supplemented to 100%; wherein the bactericidal composition is compounded from oxime zinc and difenoconazole, the oxime zinc is composed of orysastrobin and pyrithione zinc in a mass ratio of 1:1, and the mass ratio of the oxime zinc to difenoconazole is 9:1.

[0021] The preparation method of the papaya planting foliar fertilizer is as follows: the bactericidal composition, the soluble plant foliar fertilizer, the dispersant, the wetting agent and the inert filler are uniformly mixed in a mixing kettle, and then the mixture is crushed by a jet mill and then uniformly mixed.

[0022] The method of using the above-mentioned papaya planting foliar fertilizer is: dilute it with clean water and spray it on the leaves.

[0023] Example 2

[0024] A foliar fertilizer for papaya planting is prepared from the following ingredients in percentage by mass: 7.5% of a bactericidal composition, 42.5% of potassium nitrate, 5% of calcium lignin sulfonate, 3% of sodium lauryl sulfate, and attapulgite supplemented to 100%; wherein the bactericidal composition is compounded from oxime zinc and difenoconazole, the oxime zinc is composed of orysastrobin and pyrithione zinc in a mass ratio of 30:1, and the mass ratio of oxime zinc to difenoconazole is 1:1.

[0025] The preparation method and use method are the same as Example 1.

[0026] Example 3 :Screening of pesticides for controlling gray mold

[0027] 1. Test strain: The part of papaya fruit infected with gray mold was isolated from Botrytis cinerea by single spore in the laboratory and preserved on PDA medium.

[0028] 2. PDA culture medium formula: 200g peeled potatoes, 20g sucrose, 20g agar, add distilled water to 1000mL.

[0029] 3. Test agents: 99% orysofamid (Tianjin Alta Technology Co., Ltd.), 98% zinc pyrithione (Zhengzhou Alpha Chemical Co., Ltd.), 95% difenoconazole (Jiangsu Youjia Plant Protection Co., Ltd.).

[0030] The test agent was dissolved with dimethyl sulfoxide solvent, and then diluted with 0.1% Tween-80 aqueous solution to prepare a single-dose stock solution. Multiple groups of proportions were set, and each single dose and proportioned mixture was set with 5 mass concentration gradients according to the equal ratio method.

[0031] 3. Test method: Using the hyphae growth rate method, add 9mL of pre-melted PDA medium to a sterile conical flask, and quantitatively draw 1mL of drug solution from low concentration to high concentration, add it to the above conical flasks respectively, shake well and pour equal amounts into 3 culture dishes with a diameter of 9cm to make drug-containing plates of corresponding concentrations; and set the treatment containing equal amounts of dimethyl sulfoxide and 0.1% Tween-80 aqueous solution as blank control, and set 3 replicates for each treatment. Use a 5mm diameter puncher to cut the bacterial cake at the edge of the test strain colony, inoculate it in the center of the drug-containing plate and the blank control plate, cover it with a lid and place it at a constant temperature of 28℃ for cultivation. After 5 days, measure the colony diameter using the cross method, and calculate the inhibition rate of hyphae growth by different treatments.

[0032]

[0033] 4. Data analysis: DPS software was used for data statistical analysis. The logarithmic value of fungicide concentration was taken as x and the corresponding probability value of mycelium growth inhibition rate was taken as y for linear regression to obtain the toxicity regression equation and EC value of the agent. 50 The synergistic coefficient (SR) of the mixture was calculated according to the Wadley method.

[0034] 5. Measurement results

[0035] SR<0.5 is antagonistic effect; 0.5≤SR≤1.5 is additive effect; SR>1.5 is synergistic effect. The results are shown in Table 1-2.

[0036] Table 1 The results of toxicity test of orysastrobin and zinc pyrithione against Botrytis cinerea

[0037]

[0038] It can be seen from Table 1 that within the mass ratio range of 1-30:10-1, the synergistic coefficients of orysastrobin and zinc pyrithione against Botrytis cinerea of ​​papaya gray mold were greater than 1.5, showing a synergistic effect.

[0039] Table 2 The results of toxicity test of oxime·zinc and difenoconazole against Botrytis cinerea

[0040]

[0041] Note: The mass ratio of orysastrobin to pyrithione zinc in Table 2 oxime·zinc is 30:1.

[0042] It can be seen from Table 2 that within the mass ratio range of 1-9:3-1, the synergistic coefficients of oxime·zinc and difenoconazole against Botrytis cinerea of ​​papaya gray mold were greater than 1.5, showing a synergistic effect.

[0043] In summary, the three effective ingredients of orysastrobin, zinc pyrithione and difenoconazole in the fungicide composition of the present invention have a synergistic effect when used in combination, can improve the control effect of gray mold, is conducive to reducing the application dosage of chemical agents, and reduces the pesticide residues in crops, providing support for the development of new chemical agents.

[0044] The above is only a preferred embodiment of the present invention. For those skilled in the art, appropriate improvements can be made without departing from the raw materials of the present invention, and these improvements are also within the scope of protection of the present invention.

Claims

1. A foliar fertilizer for papaya planting, characterized in that: The invention is prepared from the following ingredients by mass percentage: 1-10% of a fungicide composition, 30-45% of a soluble plant foliar fertilizer, 3-6% of a dispersant, 2-3% of a wetting agent, and an inert filler supplemented to 100%; wherein the fungicide composition is compounded from oxime zinc and difenoconazole, and the oxime zinc is composed of orysastrobin and pyrithione zinc.

2. The papaya planting foliage fertilizer according to claim 1, characterized in that, The mass ratio of orysastrobin to pyrithione zinc in the oxime·zinc is 1-30:10-1.

3. The papaya planting foliage fertilizer according to claim 1, is characterized in that, The mass ratio of the oxime·zinc to difenoconazole is 1-9:3-1.

4. The papaya planting foliage fertilizer according to claim 1, characterized in that, The soluble plant foliar fertilizer is selected from one or more of potassium chloride, potassium nitrate, boric acid, magnesium sulfate and potassium dihydrogen phosphate.

5. The papaya planting foliage fertilizer according to claim 1, characterized in that, The dispersant is lignin sulfonate.

6. The papaya planting foliar fertilizer according to claim 1, characterized in that, The wetting agent is eicosyl sulfate or sodium lauryl sulfate.

7. The papaya planting foliage fertilizer according to claim 1, characterized in that, The inert filler is selected from one or more of bentonite, attapulgite, light calcium carbonate, diatomaceous earth and white carbon black.

8. Use of the papaya planting foliar fertilizer according to any one of the above claims in preventing and controlling gray mold of papaya or gray mold of fruit trees.

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