Application of ginger as a repellent plant in the control of fall armyworm
By combining ginger extract with the sex pheromone of the fall armyworm, the environmental pollution and drug resistance problems of chemical control of fall armyworm have been solved, achieving green and efficient control of fall armyworm.
Patent Information
- Application Number
- CN202411544351.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2044-10-31
AI Technical Summary
Chemical control of fall armyworm leads to environmental pollution and pesticide resistance in the pest, and existing methods are insufficient to effectively control the migration and reproduction of fall armyworm.
By using ginger extract as a repellent, and by binding ginger hexane extract or its supernatant to the fall armyworm sex pheromone, a fall armyworm repellent was developed for controlling the oviposition of the fall armyworm.
Ginger extract significantly reduces the number of eggs laid by fall armyworm on corn plants, providing a green and efficient control method that reduces the use of chemical pesticides.
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Abstract
Description
Technical fields:
[0001] This invention relates to the field of pest control technology, specifically to the application of ginger as a repellent plant in controlling the fall armyworm. Background technology:
[0002] The fall armyworm, belonging to the genus *Noctuidae* of the family Noctuidae in the order Lepidoptera, is commonly known as the fall armyworm and is native to tropical and subtropical regions of the Americas. The fall armyworm is characterized by its long-distance migration, wide host range, and high reproductive capacity, causing severe economic losses to grain crops such as corn, wheat, sugarcane, and sorghum.
[0003] Currently, chemical control is the main method for controlling fall armyworm, but it has problems such as environmental pollution and the development of pesticide resistance in pests. The combined control method of repellents and sex pheromones is an effective approach. This invention proposes a control method that combines a repellent containing alarm pheromones from other pests with plant volatiles, along with a fall armyworm sex pheromone trap. This method has significant guiding significance for the green and efficient control of fall armyworm.
[0004] Currently, the control of fall armyworm mainly relies on chemical control. However, due to the long-term and extensive use of chemical pesticides, fall armyworm has developed resistance to many types of chemical pesticides, and the effectiveness of chemical control has significantly decreased. Therefore, the use of agricultural ecological control methods is urgently needed. Summary of the Invention:
[0005] The purpose of this invention is to provide the application of ginger as a repellent plant in the control of fall armyworm.
[0006] This invention discovers that ginger extract can effectively repel the fall armyworm from laying eggs on corn plants, thus providing the application of ginger as a repellent plant in the control of fall armyworm.
[0007] Therefore, this invention provides the application of ginger as a repellent plant in the control of fall armyworm.
[0008] The preferred application is ginger in repelling the fall armyworm.
[0009] Preferably, the application is the use of ginger extract in repelling fall armyworm.
[0010] Preferably, the ginger extract is obtained by extracting ginger with n-hexane.
[0011] A further preferred method is to obtain the supernatant by centrifugation of the hexane extract of ginger.
[0012] Further preferred, the ginger extract is obtained by cutting ginger plants into small pieces, extracting them with hexane for 24 hours, centrifuging at 8000 rpm, and then collecting the supernatant.
[0013] A second objective of this invention is to provide a fall armyworm repellent containing ginger or ginger extract as an active ingredient.
[0014] Preferably, the ginger extract is a hexane extract of ginger.
[0015] A third objective of this invention is to provide a method for repelling fall armyworm, which uses ginger or ginger extract to repel fall armyworm.
[0016] Preferably, the ginger extract is a hexane extract of ginger.
[0017] This invention reveals that ginger has a good repellent effect on the oviposition of the fall armyworm and can be used for its control. Currently, research reports on fall armyworm repellents are scarce. This invention proposes a novel fall armyworm repellent extracted from plants, which has important guiding significance for the green and efficient control of the fall armyworm. Detailed implementation method:
[0018] The following embodiments are further illustrations of the present invention, but not limitations thereof.
[0019] Example 1:
[0020] 1. Potted plant oviposition experiment: Select different plant pots, two pots of each type. When the leaf area of each plant is not much different, place them in a cover (100cm*100cm*50cm). At the same time, introduce 5 pairs of newly emerged fall armyworm adults. Starting from the 3rd day, check the number of eggs laid on each plant and on the cover. After checking each day, clean up the eggs. Check for 4 consecutive days and calculate the proportion of egg masses and eggs laid by the females on each plant. Repeat 5 times.
[0021] Table 1. Oviposition rate of fall armyworm on different plants.
[0022]
[0023] Note: Different lowercase letters in the table indicate significant differences.
[0024] As shown in Table 1, the fall armyworm prefers to lay eggs on corn plants, with egg masses and individual eggs each accounting for about one-third of the total. If eggs laid on canopies are excluded, the proportion on all plants reaches approximately 40%. Therefore, corn is the fall armyworm's favorite egg-laying plant. Among the tested crops, soybeans and peas had the second highest egg-laying rate after corn. Ginger was the least favored plant for egg-laying by the fall armyworm, with egg masses and individual eggs both less than 1%. In 4 out of 5 replicates, no eggs were laid on ginger, and only 1 replicate had one egg mass, totaling 42 eggs. Therefore, we believe that ginger can be used as a repellent plant for the fall armyworm.
[0025] 2. Potted Plant Repellency Experiment: A rectangular enclosure (150cm*50cm*50cm) was used. Four potted corn plants were placed on one side, and four potted corn plants and two potted ginger plants were placed on the other side, with the ginger plants placed in the middle of the corn plants. Five pairs of newly emerged fall armyworm adults were introduced. Starting on the third day, the number of eggs laid by the fall armyworms on the corn plants on both sides was checked. The checks were conducted continuously for five days, and the number of eggs laid by the females on the corn plants on both sides and on the enclosure was calculated. The experiment was repeated five times.
[0026] Table 2. Effects of ginger intercropping on oviposition of fall armyworm on maize.
[0027]
[0028] Note: Different lowercase letters in the table indicate significant differences.
[0029] As shown in Table 2, the number of eggs laid on corn plants after intercropping with ginger was significantly lower than that of corn without intercropping, indicating that ginger can effectively repel fall armyworm from laying eggs on corn plants.
[0030] 3. Ginger Extract Cage Experiment: Ginger plants were chopped and extracted with n-hexane for 24 hours. After centrifugation at 8000 rpm, the supernatant (ginger extract) was used for the experiment. A rectangular cage (150cm*50cm*50cm) was used, with four potted corn plants on each side. On one side, a rubber stopper containing 100 μL of n-hexane was hung on each potted corn plant. On the other side, a rubber stopper containing 100 μL of ginger extract was hung on each potted corn plant. Five pairs of newly emerged fall armyworm adults were placed in each cage. Starting on the third day, the number of eggs laid by the fall armyworms on the corn plants on both sides was checked. The checks were conducted for five consecutive days, and the number of eggs laid by the females on the corn plants on both sides and on the cage was calculated. Five replicates were performed.
[0031] Table 3. Effects of ginger extract on oviposition of fall armyworm on maize.
[0032]
[0033] Note: Different lowercase letters in the table indicate significant differences.
[0034] As shown in Table 3, the number of eggs laid on corn plants after hanging ginger extract was significantly lower than that of corn plants with the control group, indicating that ginger extract can also effectively repel fall armyworm from laying eggs on corn plants.
Claims
1. Application of ginger in repelling the oviposition of fall armyworm.
2. The application according to claim 1, characterized in that, The application described is the use of ginger extract in repelling the oviposition of fall armyworm. The ginger extract is obtained by extracting ginger with n-hexane.
3. The application according to claim 2, characterized in that, The ginger extract is the supernatant obtained by centrifuging the hexane extract of ginger.
4. The application according to claim 3, characterized in that, The ginger extract is obtained by slicing ginger plants, soaking them in hexane for 24 hours, centrifuging at 8000 rpm, and then collecting the supernatant.