Fruit-sucking moth food attractant for orchard pest prevention and control

Abstract

The invention discloses a fruit-piercing moth food attractant for orchard pest prevention and control, and belongs to the technical field of green prevention and control of agricultural pests. The invention provides application of tetrandrine in preparation of a fruit-piercing moth food attractant, and saccharides, organic acid and a water-soluble gel matrix are added as auxiliary components. A trapper containing the fruit-piercing moth food attractant is hung in an orchard, it is found that the fruit-piercing moth food attractant can efficiently trap fruit-piercing moths, damage of pests to fruits is reduced, and the trapping effect is obviously better than that of traditional sweet and sour liquid. According to the method, low-value materials are utilized, the cost is low, the operation is simple, the population density of fruit-piercing moths in the orchard can be effectively reduced, the fruit loss of the orchard is reduced, and the method has a positive promotion effect on the development of the fruit industry.

Description

Technical Field

[0001] This invention belongs to the field of green pest control technology in agriculture, specifically involving a fruit-piercing moth attractant with extracts from Menispermaceae plants as the core component and its preparation method, as well as the application technology of using hanging traps to attract and kill fruit-piercing moths in orchards and reduce fruit damage rate. Background Technology

[0002] Fruit-piercing moths are a major pest in orchards. Adult moths pierce and suck fruit, causing fruit drop and rot. Traditional control methods rely on chemical pesticides, which can easily lead to pesticide resistance and environmental pollution.

[0003] In the current field of green pest control in agriculture, food attractants are an important means of reducing the use of chemical pesticides, but their application effectiveness is limited by technological bottlenecks. Existing food attractants are mostly based on sugar-vinegar solutions or sex pheromones. While sugar-vinegar solution-based attractants are widely used due to their ease of use and low cost, their trapping efficiency is generally below 50%. The fermented odor they release not only attracts target pests but also traps beneficial insects such as bees and hoverflies, resulting in insufficient effective trapping. Furthermore, their poor stability necessitates frequent replacement. Sex pheromone-based attractants have limited effects on female insects and larvae and are easily oxidized and degraded by ultraviolet light, requiring special slow-release carriers, leading to higher costs. Currently, there is a lack of highly efficient, long-lasting, and environmentally friendly plant-derived attractants on the market.

[0004] Tetrandrine is a dibenzylisoquinoline alkaloid extracted from plants of the Menispermaceae family. It is commonly used as a calcium antagonist, but its targeted killing effect on fruit-piercing moths has not yet been developed and applied. Summary of the Invention

[0005] In view of the shortcomings of existing bait attractants, such as low trapping efficiency, poor stability and high cost, the purpose of this invention is to provide a novel, highly efficient bait attractant for fruit-piercing moths to reduce the damage of pests to fruit.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a fruit-piercing moth attractant for the control of orchard pests, the main component of which is tetrandrine, with a concentration of 0.1%-2.0% w / v.

[0007] Furthermore, the fruit-piercing moth attractant may also contain: sugars at a concentration of 5%-15% w / v, organic acids at a concentration of 1%-5% w / v, and a water-soluble gel matrix at a concentration of 0.5%-3% w / v.

[0008] The present invention also applies the fruit-piercing moth attractant to pest control: hanging traps containing the fruit-piercing moth attractant in orchards proves that the attractant can effectively trap fruit-piercing moths.

[0009] Compared with the prior art, the present invention has the following beneficial effects: (1) High efficiency in trapping: Tetrandrine has a significant chemotactic effect on adult fruit-piercing moths, with a field trapping rate of ≥75%, which is higher than that of traditional sugar and vinegar solution (45%-50%).

[0010] (2) Environmentally friendly: Plant-derived components are biodegradable and harmless to non-target organisms, meeting the standards for organic orchards.

[0011] (3) Long-lasting sustained release: The gel matrix prolongs the evaporation time, and the effective period of a single use is 12-15 days, reducing the cost of manual maintenance. Attached Figure Description

[0012] Figure 1 Schematic diagram of the preparation process of food attractants; Figure 2 The diagram shows the structure and suspension position of the trap; where (A) is a schematic diagram of the trap structure and (B) is a schematic diagram of the trap suspension position. Figure 3 This is a comparative diagram of the tropism behavior of tetrandrine on fruit-piercing moth. Detailed Implementation

[0013] This invention provides a fruit-piercing moth attractant with extracts from Menispermaceae plants as its core ingredient. It uses active substances such as tetrandrine to target and kill the pest. Specifically, it includes the following technical solutions: (1) Food attractant formula.

[0014] Core ingredients: Root and stem extracts of Menispermaceae plants (such as Stephania tetrandra and Stephania tetrandra), containing the active ingredient Tetrandrine, with a concentration range of 0.1%-2.0% (w / v).

[0015] Auxiliary ingredients: sugars (fructose or sucrose, 5%-15% w / v), organic acids (acetic acid or citric acid, 1%-5% w / v), and water-soluble gel matrix (sodium carboxymethyl cellulose, 0.5%-3% w / v).

[0016] (2) Preparation method.

[0017] like Figure 1 As shown, after drying and pulverizing the Menispermaceae plants, they were extracted with a 70% v / v ethanol aqueous solution for 48 hours and concentrated to obtain a crude extract. The crude extract was then mixed with sugars, organic acids, and a gel matrix in a certain proportion, and water was added to make up to a certain volume to prepare a viscous liquid or gel attractant.

[0018] (3) Application method.

[0019] like Figure 2As shown, the attractant is loaded into a slow-release trap (such as a bottle or barrel type) and hung in the upper part of the tree canopy in the orchard (1.0-1.5 meters high), with 8-12 traps per acre; the attractant is replenished or replaced every 15 days, continuing throughout the entire fruit ripening period.

[0020] Example 1: Preparation of food attractant.

[0021] Take 200g of dried root powder of Stephania tetrandra, extract with 70% v / v ethanol for 48 hours, filter and concentrate under reduced pressure to 50mL of extract (Stephania tetrandra content 1.2% w / v).

[0022] Mix the extract with fructose (final concentration 10% w / v), citric acid (final concentration 3% w / v), and sodium carboxymethyl cellulose (final concentration 2% w / v), add water to 1L, and stir to form a gel-like inducer.

[0023] Example 2: Verification of field trapping effect.

[0024] Three concentration gradients (0.5, 1.0, 2.0% w / v) and one water control were set up in the citrus orchard. Ten traps were suspended in each concentration gradient (including the control), and each trap was filled with 500 mL of the attractant prepared in Example 1.

[0025] The number of moths attracted was monitored on days 3, 7, and 14, and the results are shown in Table 1 and 2. Figure 3 As shown, the highest cumulative moth trapping count reached 15.1 moths per trap over 3 days, 26.9 moths per trap over 7 days, and 34.2 moths per trap over 14 days, resulting in a 64% decrease in fruit damage rate.

[0026] Table 1: Statistical table of the trapping effect of attractants with different concentrations of tetrandrine *The above data is the average value of 10 traps in each group.

[0027] Example 3: Comparison of component optimization.

[0028] Comparing the trapping effects of different concentrations of tetrandrine in Example 2, the trapping rate of the 2.0% concentration group was 22.8% higher than that of the 0.5% concentration group, proving that the concentration of the effective ingredient is positively correlated with the trapping efficiency.

[0029] This invention achieves highly efficient and green control of fruit-piercing moths through the targeted trapping effect of extracts from Menispermaceae plants and tetrandrine, demonstrating significant innovation and practicality.

[0030] The above description is merely an embodiment of this specification and is not intended to limit this specification. Various modifications and variations can be made to this specification by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this specification should be included within the scope of the claims of this specification.

Claims

1. A fruit-piercing moth attractant for orchard pest control, characterized in that, The fruit-piercing moth attractant includes tetrandrine at a concentration of 0.1%-2.0% w / v.

2. The fruit-piercing moth attractant for orchard pest control according to claim 1, characterized in that, The fruit-piercing moth attractant also includes: sugars at a concentration of 5%-15% w / v, organic acids at a concentration of 1%-5% w / v, and a water-soluble gel matrix at a concentration of 0.5%-3% w / v.

3. The fruit-piercing moth attractant for orchard pest control according to claim 2, characterized in that, The sugar is fructose or sucrose, the organic acid is acetic acid or citric acid, and the water-soluble gel matrix is ​​sodium carboxymethyl cellulose.

4. A method for preparing the fruit-piercing moth attractant as described in claim 1 for controlling orchard pests, characterized in that, Includes the following steps: The roots or stems of Menispermaceae plants are dried and pulverized, extracted with an ethanol-water solution, and concentrated to obtain a crude extract. This crude extract is then mixed with sugars, organic acids, and a water-soluble gel matrix, and water is added to prepare an attractant.

5. The application of the fruit-piercing moth attractant according to any one of claims 1-3 or the fruit-piercing moth attractant prepared by the method of claim 4 in pest control, characterized in that, The application is as follows: hanging traps containing attractants for fruit-piercing moths in orchards to trap the fruit-piercing moths.

Images