CN114794136A

CN114794136A - Pesticide composition for preventing and treating citrus red leaf miner

Info

Publication number: CN114794136A
Application number: CN202210338187.0A
Authority: CN
Inventors: 刘要鑫; 仇惠君; 欧智涛; 陈香玲; 陈东奎; 赵洪涛; 李果果
Original assignee: Guangxi Zhuang Nationality Autonomous Region Academy of Agricultural Sciences
Current assignee: Guangxi Zhuang Nationality Autonomous Region Academy of Agricultural Sciences
Priority date: 2022-04-01
Filing date: 2022-04-01
Publication date: 2022-07-29
Anticipated expiration: 2042-04-01
Also published as: CN114794136B

Abstract

The invention relates to the technical field of pesticides, and particularly relates to a pesticide composition for preventing and treating citrus red leaf miner. The active ingredients of the pesticide composition for preventing and treating the citrus red leaf miner comprise hexaflumuron and veratrine, wherein the mass ratio of the hexaflumuron to the veratrine is 20:1-1: 10. The pesticide composition for preventing and treating the citrus red leaf miner has obvious synergistic effect and obvious effect of preventing and treating the leaf miner pests, and overcomes the defects of each single agent.

Description

Pesticide composition for preventing and treating citrus red leaf miner

Technical Field

The invention relates to the technical field of pesticides, and particularly relates to a pesticide composition for preventing and treating citrus red leaf miner.

Background

Exocarpium Citri rubrum is mainly derived from dry outer pericarp of Citrus reticulata Blanco of Rutaceae and its cultivar, is administered with exocarpium of immature fruit, has pungent, bitter, warm and warm properties, and has effects of regulating qi, relieving epigastric distention, eliminating dampness and eliminating phlegm, and can be used for treating cough with excessive phlegm, food stagnation with alcohol, nausea and oppression. In recent years, with the basic and large-scale large-area planting, the occurrence and harm degree of plant diseases and insect pests are increased day by day, and some important pests have seriously influenced the production and product quality of the pummelo peel. The orange is seriously damaged by insects, such as leaf miner, orange red spider and butterfly, and is seriously damaged by red citrus insect pests, such as scale insects, longicorn pests and aphids.

The citrus leaf miner becomes an important pest in the cultivation process, and can damage all citrus plants. The young worms enter the epidermis of tender leaves and stems to eat mesophyll, and leave the epidermis to form a bent and curved silvery white worm way. The damaged leaves are shriveled and hardened, photosynthesis is reduced, and even the fallen damaged curled leaves are the overwintering places of mites, scales and aphids. The leaf miner larvae are latently eaten in mesophyll, the field generations of pests are seriously overlapped, at present, no high-efficiency medicament for killing various insect states simultaneously exists, and in addition, the pests generate medicament resistance to various medicaments, so the prevention and control difficulty is high.

Hexaflumuron is an acyl urea insecticide that kills pests by interfering with chitin synthesis and has low toxicity to mammals, birds and fish. Compared with other chitin inhibitors, the chitin inhibitor has a wider insecticidal spectrum, has higher ovicidal activity and larvicidal activity, is particularly used for controlling lepidoptera insects, is mainly used for controlling diamondback moths, prodenia litura, beet armyworms, cabbage diamondback moths, cotton bollworms and the like of cruciferous vegetables, and has a good effect on pests with drug resistance to organic phosphorus, carbamates and pyrethroid vinegar. The compounded preparation of hexaflumuron is more. However, due to long-term use, the pests have different degrees of drug resistance to pesticides such as organic chlorine, organic phosphorus, carbamate and pyrethroid, the prevention and control effects of most conventional pesticides are obviously reduced, the hazards cannot be effectively controlled, and the prevention and control are difficult.

Veratrine is a toxic alkaloid produced by various veratrum plants, and has certain growth inhibition and killing effects on insect pests. The veratrine is taken as an insecticide, and the action mechanism is that veratrine enters a digestive system through the surface of a worm body or is sucked to cause local stimulation to cause reflex worm body excitation, then the sensory nerve ending of the worm body is inhibited, and the central nerve is inhibited through conduction to cause the death of pests. As a biological agent, the biological agent is harmless to crops and has no residue, and a direction is developed for producing pollution-free food and developing organic agriculture.

In the prior art, no report is provided about the combined use of hexaflumuron and veratrine for preventing and treating the citrus red leaf miner.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of Invention

In order to solve the problem of drug resistance of the citrus red leaf miner in the prior art, a pesticide composition with a synergistic effect and application thereof are provided.

In order to achieve the purpose, the invention provides the following technical scheme:

the active ingredients of the pesticide composition for preventing and treating the citrus red leaf miner comprise hexaflumuron and veratrine, wherein the mass ratio of the hexaflumuron to the veratrine is 20:1-1: 10.

Preferably, the mass ratio of the hexaflumuron to the veratrine is 10:1-1: 1.

Preferably, the mass ratio of the hexaflumuron to the veratrine is 10:1 or 1: 1.

The composition is supplemented with auxiliary ingredients for processing a pesticide preparation and processed into any one dosage form suitable for agricultural use. The pesticide composition is in any one of a suspending agent, an aqueous emulsion, a microemulsion, missible oil, wettable powder, a microcapsule suspending agent, a water dispersible granule, soluble powder and a soluble granule. The active ingredient accounts for 0.5 to 55 percent of the weight of the whole preparation.

The various compounds and/or reagents used in the present invention are commercially available and readily available.

The pesticide composition is used for preventing and removing the citrus red leaf miner.

Compared with the prior art, the invention has the following beneficial effects:

(1) the pesticide composition for preventing and treating the citrus red leaf miner has obvious synergistic effect and obvious effect of preventing and treating the leaf miner pests, and overcomes the defects of each single agent. When the mass ratio of hexaflumuron to veratrine is 10:1-1:1, the composition shows a remarkable synergistic effect, can effectively reduce the dosage of active ingredients, and can slow down the generation of drug resistance of pests.

(2) Compared with single use, the control effect on the citrus leaf miner is more than 89.0 percent when the dilution multiple of the 2 percent hexaflumuron veratrine wettable powder is 800-fold and 1000-fold; the control effect of the 5.5 percent hexaflumuron veratrine wettable powder on the citrus leaf miner is more than 90.5 percent when the dilution multiple is 1000-fold and 1500-fold. Therefore, the composition can obviously improve the prevention and treatment effect and has obvious synergistic effect.

Detailed Description

The following detailed description of specific embodiments of the invention is provided, but it should be understood that the scope of the invention is not limited to the specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

Example 1: indoor combined action determination of hexaflumuron and veratrine combination on citrus red leaf miner

And (3) testing pests: collecting the red orange leaf miners in the field, feeding the red orange leaf miners indoors for prevention and treatment, and selecting 4-instar larvae with consistent growth for testing.

Testing the medicament: 95% hexaflumuron technical material, which is sold on the market, and 98% veratrine (reagent grade), which is sold on the market;

the test method comprises the following steps: carrying out drip treatment; placing the selected test insects with regular and consistent age in a culture dish for later use, treating the test insects head by using a micro-dropping instrument, dropping 1 mu L of the medicament on the forebreast and back plate of each larva, setting contrast for each 20 larvae, repeating the treatment for 4 times, and feeding the treated test insects in a climatic chamber for 24 hours. After 24h, counting the death number of the larvae, and touching the test insects with a fine hair brush to judge that the larvae are dead if no response or slight response exists.

Performing statistical analysis by using DPS to obtain LC50 value of each medicament on the larvae of the leaf miner; and calculating the co-toxicity coefficient and evaluating according to a combined virulence calculation method proposed by Sun-Johnson.

TABLE 1 determination of the combination of hexaflumuron and veratrine on the indoor Combined action of Henry leaf moth

As can be seen from Table 1, when hexaflumuron and veratrine are used alone, LC50 of the hexaflumuron and the veratrine against Henry moth is 456.42mg/L and 12.25mg/L respectively; namely, indoor tests show that the veratrine has excellent contact activity with hexaflumuron. When the hexaflumuron and the veratrine are used in combination, the composition has an additive effect when the mass ratio of the hexaflumuron to the veratrine is 30:1-20:1 and 1:10-1: 30; when the mass ratio of hexaflumuron to veratrine is 10:1-1:1, the composition shows remarkable synergistic effect, can effectively reduce the dosage of active ingredients, and can slow down the generation of drug resistance of pests.

Example 2: field testing of Heliothis virescens with hexaflumuron and veratrine combination

And (3) testing pests: citrus leaf miner

Testing the medicament:

the 2% hexaflumuron veratrine wettable powder comprises the following components in percentage by weight:

1% of hexaflumuron, 1% of veratrine, 2% of calcium lignosulfonate, 1.5% of sodium dodecyl sulfate, 4% of white carbon black and 100% of kaolin.

The 5.5 percent hexaflumuron veratrine wettable powder comprises the following components in percentage by weight:

5% of hexaflumuron, 0.5% of veratrine, 3% of calcium lignosulfonate, 2% of sodium dodecyl sulfate, 5% of white carbon black and kaolin for supplementing 100%.

The 0.5% veratrine wettable powder comprises the following components in percentage by weight:

veratrine 0.5%, calcium lignosulfonate 2%, sodium dodecyl sulfate 1.5%, white carbon black 4% and kaolin for 100%.

The 2.5 percent hexaflumuron wettable powder comprises the following components in percentage by weight:

2.5 percent of hexaflumuron, 2.5 percent of calcium lignosulphonate, 1 percent of sodium dodecyl sulfate, 4 percent of white carbon black and the balance of kaolin accounting for 100 percent.

The test method comprises the following steps: referring to "test criteria for pesticide field efficacy (second) part 58: the pesticide is used for preventing and controlling citrus leaf miner. The experiment was repeated three times, randomized block arrangement. Investigating pest base number before medicine; spraying the pesticide twice at intervals of 7 days, and investigating the number of live insects 7 days after the pesticide is sprayed for the second time. And calculating the control effect. The specific calculation formula is as follows:

the percent population reduction is (pre-drug worm number-post-drug worm number)/pre-drug worm number 100;

the control effect is (treatment population decline rate-blank population decline rate)/(100-blank population decline rate) × 100.

TABLE 2 field test results of hexaflumuron and veratrine combinations on citrus leaf miners

As can be seen from Table 2, the control effect of the 0.5% veratrine wettable powder diluted by 600 times on citrus leaf miner is 72.6%; the 1200-time dilution of the 2.5 percent hexaflumuron wettable powder has the control effect on the citrus leaf miner of 70.4 percent, the control effect on the citrus leaf miner is obviously improved after the hexaflumuron and the veratrine are used in combination, and the control effect is more than 89.0 percent when the dilution multiple of the 2 percent hexaflumuron-veratrine wettable powder is 800-fold and 1000-fold. When the dilution multiple of the 5.5 percent hexaflumuron veratrine wettable powder is 1000-fold and 1500-fold, the control effect is more than 90.5 percent. Therefore, the composition can obviously improve the prevention and treatment effect and has obvious synergistic effect.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. The pesticide composition for preventing and treating the citrus red leaf miner is characterized in that active ingredients comprise hexaflumuron and veratrine, and the mass ratio of the hexaflumuron to the veratrine is 20:1-1: 10.

2. The pesticide composition as set forth in claim 1, wherein the mass ratio of hexaflumuron to veratrine is 10:1-1: 1.

3. The pesticide composition as set forth in claim 2, wherein the mass ratio of hexaflumuron to veratrine is 10:1 or 1: 1.

4. The agricultural chemical composition as claimed in any one of claims 1 to 3, wherein the agricultural chemical composition is formulated into any one of dosage forms suitable for agricultural use with an auxiliary ingredient for formulation processing of an insecticide.

5. The agricultural chemical composition as set forth in claim 4, wherein the agricultural chemical combination is in the form of any one of a suspension, an aqueous emulsion, a microemulsion, an emulsifiable concentrate, a wettable powder, a microcapsule suspension, a water dispersible granule, a soluble powder and a soluble granule.

6. The pesticide composition as set forth in claim 5, wherein the active ingredient is contained in an amount of 0.5 to 55% by weight based on the whole formulation.

7. Use of a pesticide according to any one of claims 1 to 6 for combating pests, characterized in that said pests are Arctochilus citriodora.