Oviposition repellent for spodoptera frugiperda
By using anti-2-decenal as an egg-laying repellent for Falligera, the existing chemical control methods have solved the pollution and drug resistance problems in preventing and controlling fallowingera moth, and effectively avoiding fallowingera moth's egg-laying repellent, providing an environmentally friendly control method.
Patent Information
- Application Number
- CN202411494206.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-02-28
AI Technical Summary
The existing chemical control methods have problems such as environmental pollution and pest resistance when preventing and controlling fall armyworms, making it difficult to effectively prevent and control fall armyworm egg laying.
The formulation for repelling fallopian moths was prepared by dissolving it in n-hexane and adding antioxidants and ultraviolet adsorbents.
It significantly reduces the egg laying of Fatty Moth on the target plants, provides an environmentally friendly and effective new method to prevent and control Fatty Moth Moth, and avoids the environmental pollution and drug resistance problems caused by chemical control.
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Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of agricultural pest control, and particularly relates to an oviposition repellent for fall armyworm. Background Art
[0002] Fall armyworm, commonly known as fall armyworm, belongs to the genus Spodoptera of the family Noctuidae in the order Lepidoptera. It is native to tropical and subtropical regions of America. Fall armyworm has the characteristics of long-distance migration, wide host range, and strong reproductive capacity, causing serious economic losses to grain crops such as corn, wheat, sugarcane, and sorghum.
[0003] Currently, chemical control is the main method for preventing and controlling fall armyworm, but chemical control has problems such as polluting the environment and causing pests to develop pesticide resistance. Summary of the invention
[0004] The purpose of the present invention is to provide a use of trans-2-decenal as a repellent for fall armyworm, that is, to use trans-2-decenal in preventing and controlling fall armyworm.
[0005] The invention provides a use of trans-2-decenal as an oviposition repellent for fall armyworm.
[0006] The invention provides a method for repelling fall armyworm, which uses trans-2-decenal to repel fall armyworm, specifically, uses trans-2-decenal as an oviposition repellent to control female fall armyworm moths.
[0007] Preferably, trans-2-decenal is used at a concentration of 1 to 10 μg / μL, more preferably, 10 μg / μL.
[0008] The present invention also provides a preparation for repelling fall armyworm oviposition, wherein trans-2-decenal is added to the preparation as an active ingredient.
[0009] Furthermore, the concentration of trans-2-decenal in the preparation is 0.1 to 10 μg / μL, preferably 10 μg / μL.
[0010] The sustained-release carrier is prepared by dissolving trans-2-decenal in n-hexane, and adding an antioxidant 2,6-di-tert-butyl-p-cresol and an ultraviolet light absorber 2-hydroxy-4-methoxybenzophenone.
[0011] Preferably, the antioxidant 2,6-di-tert-butyl-p-cresol and the ultraviolet light absorber 2-hydroxy-4-methoxybenzophenone are added in a mass ratio of 1:1.
[0012] After analyzing the egg-laying selectivity of the fall armyworm on different plants, the present invention found that the fall armyworm does not choose coriander as an egg-laying plant.
[0013] After analyzing the volatile components of coriander, the present invention finds that trans-2-decenal has the effect of repelling fall armyworm, and can be used to prepare a repellent to repel fall armyworm from laying eggs, thereby providing a new compound for preventing and controlling fall armyworm. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is the effect of trans-2-decenal to repel female fall armyworm;
[0015] Figure 2 It is the effect of trans-2-decenal to repel male fall armyworm;
[0016] Figure 3 It is the repellent effect of 10 μg / μl trans-2-decenal on female insects. DETAILED DESCRIPTION
[0017] During the experiment, it was found that the fall armyworm did not choose coriander when choosing a plant to lay its eggs, and tended to avoid coriander in behavior. After analyzing the volatile components of coriander, it was found that trans-2-decenal has the effect of repelling fall armyworms and can be used to prepare repellents.
[0018] The present invention is described in detail below in conjunction with embodiments and drawings.
[0019] Example 1: Determination of the repellent effect of trans-2-decenal on fall armyworm
[0020] Behavioral responses of S. frugiperda to synthetic compounds were tested using a glass Y-tube olfactometer (stem length 20 cm; diameter 3 cm; arm length 15 cm, diameter 2.5 cm, arm angle 90°). A unidirectional airflow of 0.5 L / min was maintained downwind by connecting the olfactometer stem to a vacuum pump. Ambient air was filtered through charcoal, moistened with distilled water, and then pulled through each arm. Trans-2-decenal compounds were prepared in hexane and diluted to concentrations of 0.1, 1, and 10 μg / μL. Standard aliquots (10 μL) of the selected concentrations were pipetted onto a piece of filter paper (1 cm2), exposed to air for 20 s to allow the solvent to evaporate, and then placed in one arm of the olfactometer. A piece of filter paper containing 10 μL of hexane control was placed in the symmetrical arm. In each trial, a S. frugiperda adult was introduced to the base of the olfactometer stem and allowed to choose between the synthetic compound and the control.
[0021] The results show that ( Figure 1 and Figure 2 ), in the Y tube bioassay, trans-2-decenal significantly repelled female fall armyworm at all doses, and repelled male fall armyworm at medium and high doses of trans-2-decenal.
[0022] Example 2: Determination of the oviposition repellent effect of trans-2-decenal on fall armyworm
[0023] A rubber head carrier with 100 μL trans-2-decenal (10 μg / μL) as the treatment agent and a rubber head holder with 100 μL n-hexane were used. Two 20-30 cm tall corn plants were placed at both ends of a 1.5 m × 0.4 m × 0.4 m high cage, and two rubber heads containing 100 μL trans-2-decenal (10 μg / μL) and 100 μL n-hexane were fixed in the two plant pots. Five pairs of fall armyworms on the third day after emergence were placed in the cage, and the number of eggs at 24 hours, 48 hours, and 72 hours were recorded.
[0024] Twenty-five corn pots (5 rows, 5 plants per row) were placed in a greenhouse, with a spacing of 30 cm between plants in each pot. A rubber-tipped carrier containing 100 μL of n-hexane and trans-2-decenal (10 μg / μL) was placed as a control and treatment. Fifteen pairs of fall armyworms on the third day after emergence were placed in the greenhouse, and the number of eggs was recorded at 24 hours, 48 hours, and 72 hours.
[0025] The results of egg laying by female fall armyworms in large cages are as follows Figure 3 As shown. After 24 hours, the number of eggs laid by female fall armyworms in corn plants (with n-hexane as the control) was 685.83, and the number of eggs laid by female fall whiteflies in corn plants containing 10 μg / μl trans-2-decenal was 83.83, and the number of eggs laid on corn plants containing n-hexane was significantly higher than that on corn plants containing 10 μg / l trans-2-decenal. Therefore, within 24 hours, 10 μg / μl trans-2-decenal has a strong oviposition repellent effect on female fall armyworms. At 48 hours, the number of eggs laid by female fall armyworms in corn plants (with n-hexane as the control) was 1136.17, and in corn plants with 10 μg / μl trans-2-decenal, the number of eggs laid by female fall armyworms was 131.83, and the number of eggs laid on corn plants with n-hexane was significantly higher than that on corn plants with 10 μg / μl trans-2-decenal (P < 0.001). Therefore, at 48 hours, 10 μg / μl trans-2-decenal has a strong oviposition repellent effect on female fall armyworms.
Claims
1. Application of trans-2-decenal in repelling fall armyworm.
2. A method for repelling fall armyworm, characterized in that: Trans-2-decenal is used to repel fall armyworm.
3. The method according to claim 2, characterized in that Trans-2-decenal is used as a repellent to prevent and control the egg laying of female moths of the fall armyworm.
4. The method according to claim 2 or 3, characterized in that: The trans-2-decenal is used at a concentration of 1 to 10 μg / μL.
5. A formulation for repelling fall armyworm, characterized in that: Trans-2-decenal is added as the active ingredient.
6. The method according to claim 5, characterized in that The preparation is prepared by dissolving trans-2-decenal in normal hexane, and adding antioxidant 2,6-di-tert-butyl-p-cresol and ultraviolet light absorber 2-hydroxy-4-methoxybenzophenone.
7. The method according to claim 5 or 6, characterized in that: The use concentration of the preparation trans-2-decenal is 1-10 μg / μL.
8. The method according to claim 5, characterized in that The antioxidant 2,6-di-tert-butyl-p-cresol and the ultraviolet light absorber 2-hydroxy-4-methoxybenzophenone are added in a mass ratio of 1:
1.
9. A method for preventing fall armyworm from laying eggs, characterized in that: The preparation of claim 5 is dripped into a slow-release carrier, and the slow-release carrier is hung 15-20 cm above the target crop.
10. The method according to claim 9, characterized in that The slow-release carrier is a rubber head.