JP5530625B2 - Pest control method - Google Patents

Description

  The present invention relates to a method for controlling pests in the field of agriculture and horticulture.

In the field of agriculture and horticulture, so-called nursery bed raising is widely practiced in raising seedlings by directly sowing seedling fields when raising seedlings of crops. In seedling raising, a large amount of seedlings can be obtained without using a specific container for seedling raising (for example, a cell-shaped seedling raising tray).
Pests that harm crops are generated even during the nursery period, so pest control is required to obtain healthy seedlings.
Recently, agrochemical granules containing dinotefuran and acetamiprid as active ingredients have been developed as pest control insecticides that can be used even during the nursery period. These pesticide granules are easy to handle and have high workability, and can be used for controlling pests such as hemiptera pests. However, these agrochemical granules cannot be irrigated because the dosage form is granules.
In addition, an agrochemical formulation containing dinotefuran and benfuracarb as active ingredients has been developed as an insecticide for pest control that can be irrigated in a cell-molded seedling tray. However, these insecticides are not used for the nursery bed irrigation treatment at the time of sowing and during the seedling raising period, and at present there are no drugs that can be used in the nursery bed irrigation treatment.
On the other hand, anthranilamide derivatives such as the arthropod anthranilamides of the formula (1) shown in Patent Document 1 and the arthropod anthranilamides of the formula (1) shown in Patent Document 2 are agricultural and horticultural. It has been developed as an insecticide for pest control. These insecticidal anthranilamide derivatives have very low human toxicity and high crop safety, and can be used for controlling insects such as lepidopteran pests as foliar spraying agents and soil treatment agents.
JP-T-2004-538328 Japanese Patent Laying-Open No. 2005-41880

  Providing a method to control the damage caused by insect pests during the seedling period and after planting in a labor-saving manner by irrigating the soil at the time of sowing or planting the seedlings or the plant stock of the seedlings To do.

The present inventors diligently studied to solve the above problems. As a result, among the compounds disclosed in Patent Documents 1 and 2, the compound described in the bottom row of [Table 2] on page 41 of Patent Document 1 or Example 6 of Patent Document 2, A plant represented by the following formula 1 (hereinafter referred to as “compound 1”) or a composition containing an agriculturally appropriate salt thereof as an active ingredient, a plant body or a nursery bed at the time of sowing or raising a nursery It was found that by irrigating the soil of the plant body of the seedling being raised, the damage caused by the pests of the crops during the seedling period and after planting was suppressed, and the safety of phytotoxicity to the plant body was high, and the present invention was completed. .

That is, the present invention has the following configuration.
(1) A biologically effective amount of a compound represented by the above formula 1 or a composition containing an agriculturally suitable salt thereof as an active ingredient, a plant body or a seedling at the time of sowing or in a nursery A method for controlling pests, comprising irrigating the soil of the plant body of the plant grown on the floor.
(2) The method according to (1) above, wherein the composition is a liquid preparation.
(3) The method according to (1) or (2) above, wherein the active ingredient per square meter is 0.1 g to 2 g.
(4) The method according to any one of (1) to (3) above, wherein the composition is irrigated within 50 days before planting in the main field.

The method of the present invention is sufficient for controlling pests not only during the seedling period but also after planting by irrigating the soil at the time of sowing or the seedling of the plant body in the nursery or raising the seedling. Effects can be obtained.
In addition, the method of the present invention can reduce the number of times of use and application rate of pesticides compared to the conventional control method, and the irrigation treatment in the nursery bed takes less labor and time than the conventional pesticide spraying in the main field. Therefore, it is possible to reduce the control cost and save labor.
Furthermore, the method of the present invention has high safety against phytotoxicity against plants.

で表される化合物に加え、その農学的に適切な塩を含み、またはこれらを組合せて用いることができる。農学的に適切な塩としては、臭化水素酸、塩化水素酸、硝酸、リン酸、硫酸、酢酸、酪酸、フマル酸、乳酸、マレイン酸、マロン酸、オキサル酸、プロピオン酸、サリチル酸、酒石酸、４−トルエンスルホン酸または吉草酸のような無機酸または有機酸による酸付加塩が挙げられる。 The active ingredient contained in the composition in the method of the present invention is represented by the formula 1

In addition to the compound represented by the formula, the agriculturally suitable salt thereof may be contained, or these may be used in combination. Agronomically suitable salts include hydrobromic acid, hydrochloric acid, nitric acid, phosphoric acid, sulfuric acid, acetic acid, butyric acid, fumaric acid, lactic acid, maleic acid, malonic acid, oxalic acid, propionic acid, salicylic acid, tartaric acid, Examples include acid addition salts with inorganic or organic acids such as 4-toluenesulfonic acid or valeric acid.

The amount of active ingredient required to prevent crop damage by pests according to the method of the present invention, which is the type, size, life cycle, etc. of the pest to be controlled. It can be determined appropriately by those skilled in the art. Under normal circumstances, the active ingredient per square meter is 0.1 g ai / m ² or more, preferably 0.1 to ² g ai / m ² , particularly preferably 0.25 to 1 g ai. the compositions of the present invention so as to be ./m ^2, it is possible to irrigate treated strains original soil sowing time or plants in nursery bed nursery or plants in nursery bed nursery.

  Irrigation refers to pouring a drug into the soil to control pests. In the present invention, the irrigation treatment is applied to the plant body at the time of sowing or the nursery-bed nursery plant, or the soil of the plant stock of the nursery-bed nursery plant. It means until the bud comes out on the ground. In addition, the term “plant in the nursery” means a treatment method in which the chemical solution is applied to the plant body, for example, by irrigating the chemical solution from above the plant body using a watering can. The term “soil of the plant body under raising seedling” means a treatment method in which the chemical solution is not directly applied to the plant body, for example, by irrigating the chemical solution using an irrigation tube installed at the plant source.

  The application time to the plant body or soil for preventing crop damage caused by the pests of the present invention may be any time during sowing after seeding, for example, within 50 days, within 40 days, and 30 days before planting in the main field. Within 20 days, 10 days, 10 days, and 5 days, it is possible to effectively prevent pest damage by irrigating the soil or plant body of the seedling.

  The optimal liquid volume when irrigating a liquid preparation or a diluted solution thereof to a plant body or soil before planting varies depending on the plant seedling form, but is 0.5 liter to 5 liters per square meter, preferably 0.5 liters to 2 liters is desirable.

The method of the present invention can effectively prevent pest damage to crops. Examples of pests that can prevent crop damage here include the following.
Lepidoptera: Steller's beetle (Pieris rapae), Green moth (Ostrinia furnacalis), Red beetle (Parnara guttata), Dwarf moth (Diaphania indica), Tobacco moth (Helicoverpa armigera), Agrotis segetum Pepper moth (Lyonetia prunifoliella malinella), Plutella xylostella, Cnaphalocrocis medinalis, Spodoptera exigua, Etiella zinckena, Etiella zinckena Euproctis pseudoconspersa, Adoxophyes honmai, Caloptilia theivora, Chamonaki (Homona magnanima), Chilo suppressalis, Hellulla undalis, Spodoptera litura, Naranga aenescens, Mamestra brassicae, Ascotis selenaria, Adoxophyes orana, Diptera: Rabbit, Delia ura ), Tomato leaffly (Liriomyza sativae), eggplant leaffly (Liriomyza bryoniae), leafworm (Chromatomyia horticola), leek leaffly (Liriomyza chinensis), bean leaffly (Liriomyza trifolii)
Coleoptera: rice weevil (Oulema oryzae), rice weevil (Echinocnemus squameus), rice weevil (Lissorhoptrus oryzophilus), cucumber horn beetle (Aulacophora femoralis), pheasant moth (Pyllotreta striolata), moth (Listroderes constirostris)
Stink bugs include, but not limited to, Nephotettix cincticeps and Plautia stali.

Examples of plants to be treated by the method of the present invention include the following.
Rice, barley, wheat, oat, rye, corn, sugarcane, millet, millet, barnyard, etc., family of buckwheat, etc., potato, eggplant, tomato, pepper, pepper, etc., soda family, sweet potato, etc. Convolvulaceae, common bean, azuki bean, soybean, cowpea, pea, broad bean, legume such as peanut, mallow such as sugar beet, red beet, spinach, chard, red beetle Brassicaceae such as turnips and mustards, cucumbers, melons, gizzards, watermelons, pumpkins, loofahs, yugao, tougan, cucumbers, taros such as taros, potatoes such as yam, gingers such as ginger, Leek, scallion, rakkyo, leek, Garlic, mushrooms, asparagus, tulips, etc., oysters, cypresses, pineapples, pineapples, bananas, etc., strawberries, apples, plums, apricots, peaches, plums, Japanese pears, chugokunashi, pears Such as rose, grapes, beech such as chestnuts, matabidae such as kiwi, citrus such as citrus, mulberry such as mulberry, perilla such as perilla, mint, cha, camellia, sasanqua, etc. Agricultural and horticultural useful plants and forestry plants, including camellia, burdock, lettuce, garlic, fuchsia, yacon, ezogiku, chrysanthemum, dahlia, calendula, etc. Can be mentioned.

In actually applying the composition used in the method of the present invention, the composition may be used in combination with other active compounds, for example, insecticides, fungicides, fertilizers, and the like, if necessary. Furthermore, when other active compounds are contained, those active compounds preferably have absorption transferability from roots. Representative examples thereof are diazinon, isoxathione, dimethoate, ethylthiomethone, motocrotofos, acephate, DEP, carbosulfan, benfuracarb, bensultap, imidacloprid, acetamiprid, nitenpyram, thiacloprid, thiamethoxam, clothianidin, dinotefuran thioprotilol, fipronamide , Flutolanil, azoxystrobin, orissastrobin, probenazole, furametopyr, tifluzamide, pyroxylone, kasugamycin, carpropamide, diclocimet, tricyclazole and the like.
The composition used in the method of the present invention can be in any dosage form suitable for irrigation, preferably a liquid formulation such as wettable powder, wettable granule, granular aqueous solvent, emulsion, liquid, oil, flowable, emulsion. It can be prepared and used in any dosage form such as an agent, a microemulsion agent, a suspoemulsion agent, and a microcapsule agent. The formulation method does not have to be a specific method, and is prepared by blending an insecticidal component and a carrier (solid or liquid), an auxiliary agent such as a surfactant, a binder, a stabilizer, etc. by a conventional method. Can do.

Although the specific example of this invention is shown below by a formulation example and a test example, this invention is not limited only to these illustrations.
In addition, all the parts in a formulation example show a mass part.

Formulation Example 1 (Emulsion production)
An emulsion was obtained by uniformly mixing 5 parts of Compound 1, 10 parts of Solpol T-15 (manufactured by Toho Chemical Co., Ltd., surfactant) and 85 parts of N-methylpyrrolidone.

Formulation Example 2 (Production of wettable powder)
5 parts of Compound 1, 5 parts of white carbon, 2 parts of sodium lauryl sulfate, 2 parts of calcium lignin sulfonate and 86 parts of finely divided clay were uniformly mixed to obtain a wettable powder.

Formulation Example 3 (Production of flowable agent)
5 parts of Compound 1, 5 parts of propylene glycol, 5 parts of Solpol T-20 (manufactured by Toho Chemical Co., Ltd., surfactant), 2 parts of sodium lignin sulfonate and 78 parts of ion-exchanged water were mixed, and 5 parts of 2% aqueous solution of kitasan gum was added. In addition, the mixture was uniformly mixed to obtain a flowable agent.

Example 1 Effect of cabbage on diamondback moth in seeding irrigation treatment When the cabbage (gold type 201) is seeded, the flowable agent prepared in Formulation Example 3 is diluted with water and irrigated with an amount equivalent to 2.1 mg ai. did. Irrigation liquid medicine amount was a 1l / m ² and 0.5 l / m ^2. The sowed cabbage was grown as it was and planted in this field 36 days after the treatment. After 14 days and 35 days after planting, the lowermost leaves were cut out, placed in a plastic petri dish, and 3rd-instar larvae were released there, and the number of dead moths was examined 4 days after the release. The results are shown in Table 1. It was found that the seedling irrigation treatment at the time of sowing of Formulation Example 3 showed a high insecticidal effect against the third instar larvae even 35 days after the treatment. The insecticidal effect was equivalent to the cell-shaped seedling raising tray irrigation treatment at the time of sowing of Preparation Example 3, and was superior to the planting hole treatment of the control A granule (acetamiprid granule). No phytotoxicity was observed.

Example 2 Effect of cabbage on konaga in nursery bed irrigation treatment 2.1 ml of the flowable agent prepared in Formulation Example 3 was diluted with water to cabbage seedlings (gold-based 201, 6-7 leaf stage) in nursery bed raising seedlings. A.i./strain equivalent amount was irrigated into the plants in the nursery. Irrigation liquid medicine amount was a 1l / m ² and 0.5 l / m ^2. The treated cabbage was grown as it was and planted in the main field the day after the treatment. After 14 days and 35 days after planting, the lowermost leaves were cut out, placed in a plastic petri dish, and 3rd-instar larvae were released there, and the number of dead moths was examined 4 days after the release. The results are shown in Table 2. Even after 35 days of treatment, it was found that a high insecticidal effect was exhibited against the third instar larvae. The insecticidal effect was equivalent to the cell-shaped seedling raising tray irrigation treatment of Formulation Example 3, and was superior to the planting hole treatment of the control A granule (acetamiprid granule). No phytotoxicity was observed.

Claims (4)

A biologically effective amount of the following formula 1:

A plant containing a compound represented by the above or an agriculturally suitable salt thereof as an active ingredient at the time of sowing on a nursery bed or in a nursery or raising a nursery, Irrigated with a general formula [however, the general formula

[ Wherein Y represents CH ₂ , S or NR ⁶ (R ⁶ represents a hydrogen atom or a C _1-6 alkyl group), Z represents N or CH, W represents a cyano group or a nitro group, A and B are the same or different and each represents a hydrogen atom or a C _1-6 alkyl group, or both are adjacent to each other.

Together with the general formula

Represents a ring represented by
Also formula

Represents a heterocyclic group selected from a pyridyl group, a thiazolyl group, and a tetrahydrofuryl group, and the heterocyclic group may be substituted with 1 to 3 halogen atoms.] Excluding combined use] , pest control method.   The method of claim 1, wherein the composition is a liquid formulation.   The method according to claim 1 or 2, wherein the active ingredient is 0.1 g to 2 g per square meter.   The method according to any one of claims 1 to 3, wherein the composition is irrigated within 50 days before planting in the main field.