Application of plant source active substance DMPA in prevention and treatment of tomato leaf miner adults

Abstract

The invention discloses an application of a plant source active substance DMPA in prevention and treatment of tomato leaf miner adults, and belongs to the field of pest control, research finds that a main volatile gas component 2, 2-dimethyl-4-pentenoic acid of nepenthes has a very excellent prevention and treatment effect on tomato leaf miner, and the main volatile gas component 2, 2-dimethyl-4-pentenoic acid can be used for preventing and treating tomato leaf miner adults. The death effect is achieved when the dosage is 1 * 10 <-4 > liters per cubic meter, the death rate is about 70% when the dosage is 2 * 10 <-4 > liters per cubic meter, the death rate is about 100% when the dosage is 4 * 10 <-4 > liters per cubic meter, and the composition can be applied to prevention and treatment of tomato leaf miners in greenhouses.

Description

Technical Field

[0001] The invention belongs to the field of pest control, and particularly relates to application of DMPA in controlling adult tomato leafminers. Background Art

[0002] The tomato leafminer, an insect of the genus Solanum, family Solanum, in the order Lepidoptera, is a destructive, invasive pest native to South America. Due to its wide temperature adaptability range, multiple host crops, wide suitable habitat, strong reproductive capacity, and heavy damage and losses, it has expanded and spread after invading my country, seriously harming the production of tomatoes and other Solanaceae crops. The tomato leafminer mainly causes damage with its larvae, which feed on leaf flesh, especially tender leaves, forming translucent channels or spots of various shapes on the leaves being fed; in the later stages of the damage, the leaves shrink and dry up, leaving only green veins. In addition, the larvae also bore into flower buds and fruits.

[0003] In 2023, the tomato leafminer was added to the "List of Class I Crop Pests and Diseases". Various control methods are used to control its occurrence, among which the use of synthetic chemical agents is still the main control method. However, the widespread and large-scale use of traditional chemical agents has increased the resistance of tomato leafminers to traditional insecticides. Therefore, it is of great significance to find new effective substances and develop new insecticides for the control of tomato leafminers. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a new method for preventing and controlling tomato leafminers.

[0005] The technical scheme of the present invention is: application of 2,2-dimethyl-4-pentenoic acid in preventing and controlling adult tomato leafminers.

[0006] Furthermore, the control method is: fumigation with 2,2-dimethyl-4-pentenoic acid in a greenhouse.

[0007] Furthermore, the amount of 2,2-dimethyl-4-pentenoic acid used is 1×10 -4 liters of 2,2-dimethyl-4-pentenoic acid.

[0008] Furthermore, the amount of 2,2-dimethyl-4-pentenoic acid used is 2×10 -4 liters of 2,2-dimethyl-4-pentenoic acid.

[0009] Furthermore, the amount of 2,2-dimethyl-4-pentenoic acid used is 4×10 -4 2,2-dimethyl-4-pentenoic acid

[0010] Furthermore, ethyl acetate is used as solvent during the fumigation.

[0011] Furthermore, the volume ratio of the 2,2-dimethyl-4-pentenoic acid to ethyl acetate is (0.5-2):(98-99.5). Use of 2,2-dimethyl-4-pentenoic acid in the preparation of a drug for controlling tomato leafminer.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The present invention found that the volatile gas component 2,2-dimethyl-4-pentenoic acid of Nepenthes has a very excellent control effect on the adult tomato leafminer. -4 The dosage of 100 liters per cubic meter is lethal, 2×10 -4 The lethality rate of 4×10 -4 The mortality rate of one liter per cubic meter is about 100%, and it can be used in greenhouses to control tomato leaf miners. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The DMPA content was detected in the odor volatiles of Nepenthes predatory cages;

[0015] Figure 2 This is a picture of the fumigation experiment scene;

[0016] Figure 3 is the mortality rate of DMPA fumigation to tomato leafminer;

[0017] Figure 4 The lethal phenotype of DMPA fumigation to tomato leafminer. DETAILED DESCRIPTION

[0018] The experimental methods in the following examples are conventional methods unless otherwise specified. The experimental materials used in the following examples are purchased from commercial channels unless otherwise specified.

[0019] Example 1

[0020] A high level of 2,2-dimethyl-4-pentenoic acid (DMPA) was detected in the odor volatiles of pitcher plants. Figure 1 ), is one of the volatile components of the odor of predatory pitcher plants. DMPA is a fatty acid with a methyl branch, a molecular weight of 128.17, and can be used as an intermediate in organic synthesis. It has a certain solubility, is slightly soluble in water, and is soluble in solvents such as alcohols and ethers. DMPA has good thermal and chemical stability and is not easy to decompose and deteriorate.

[0021] Example 2

[0022] In order to verify the control effect of DMPA on tomato leafminer adults, the following experiment was conducted.

[0023] (1) Experimental method: DMPA (≥98%) was prepared with ≥99.5% ethyl acetate to form 2%, 1%, and 0.5% solutions, respectively. The control was ≥99.5% ethyl acetate. 5 μL of the solution was dropped onto a 1 cm 2 The filter paper was fixed with a needle and suspended on the top of a 250mL conical bottle, and the conical bottle mouth was sealed with a sealing film. Ten three-day-old tomato leafminer adults were tested in each treatment, and three groups of replicates were set for each treatment. The fumigation treatment lasted for 3 hours.

[0024] (2) Experimental results: 5 μL ethyl acetate (≥99.5%) had no lethal effect on adult tomato leafminers. Different amounts of DMPA had varying degrees of lethality to tomato leafminers. 0.05 μL DMPA had a better fumigation lethality to tomato leafminers ( Figure 2 , Figure 3 , Figure 4 ). This indicates that DMPA can be used to control tomato leafminer.

Claims

1. Application of 2,2-dimethyl-4-pentenoic acid in controlling adult tomato leafminers.

2. The use according to claim 1, characterized in that: The control method is: fumigating with 2,2-dimethyl-4-pentenoic acid in a greenhouse.

3. The use according to claim 2, characterized in that: The dosage of 2,2-dimethyl-4-pentenoic acid is 1×10 -4 liters of 2,2-dimethyl-4-pentenoic acid.

4. The use according to claim 3, characterized in that: The dosage of 2,2-dimethyl-4-pentenoic acid is 2×10 -4 liters of 2,2-dimethyl-4-pentenoic acid.

5. The use according to claim 4, characterized in that: The dosage of 2,2-dimethyl-4-pentenoic acid is 4×10 -4 liters of 2,2-dimethyl-4-pentenoic acid.

6. The use according to any one of claims 2 to 5, characterized in that: During the fumigation, ethyl acetate is used as solvent.

7. The use according to claim 6, characterized in that: The volume ratio of the 2,2-dimethyl-4-pentenoic acid to ethyl acetate is (0.5-2):(98-99.5).

8. Use of 2,2-dimethyl-4-pentenoic acid in the preparation of a medicament for controlling tomato leafminer.

Images