JPH02111706A - Soil-treatment insecticide for agricultural and horticultural use - Google Patents

Abstract

PURPOSE:To obtain a soil-treatment insecticide for agricultural and horticultural use having high stability and safety by combining dimethyl(4-ethoxyphenyl)[3-(3- phenoxy-4-fluorophenyl)propyl]-silane with octachlorodipropyl ether. CONSTITUTION:The objective soil-treatment insecticide for agricultural and horticultural use is produced by combining the compound of formula with octachlorodipropyl ether (a synergist for pyrethroid) at a mixing ratio of prefer ably 1:(1-5). The agent exhibits high insecticidal effect against vermin harmful to vegetable (e.g., May beetle, common cutworm, cabbage armyworm, curcurbit leaf beetle, spring beetle or cricket), vermin living in a lawn [e.g., May beetle or SHIBATSUTO-GA (Nipponopsyche fuscescens, a kind of moth)] and plant- parasitic soil nematodes. High controlling effect can be attained either by mixing in soil before transplantation or sowing or scattering to the soil during the growing stage of the vegetable.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides dimethy/L/(4-ethoxypheny/v)
(Regarding an agricultural and horticultural soil treatment insecticide characterized by containing 3-(3-phenoxy-4-fluorophenyl)propyl/L/nonfun and octachlorodipropyl ether.

[Conventional technology]

In recent years, insect pests such as scarab beetles, cutworms, potato beetles, sipat moths, and sipata weevils, in other words, small animals such as insects that live permanently or temporarily in the soil environment and carry out some kind of harmful activity on crops or plants, have been introduced. The damage caused by these pests (hereinafter referred to as soil pests) is increasing and becoming a problem in agricultural land, golf courses, and forests across the country. Because it is not easy to investigate the pest population and damage, and the growth period is long and breeding is difficult, the ecology has not been sufficiently investigated, and effective and stable control methods have not yet been established. This is the current situation.

In general, there are two methods for controlling soil pests: one is to mix insecticides into the soil in the ridges immediately before planting, and use this to kill the larvae that live or emerge. The method of controlling these insects by spraying them on the ridges is to target the adult insects that fly to spawn and the young larvae that have just hatched.In either case, carbamate insecticides such as carbonurphan and NAC, or Diazinon, isoxathion, ethium thiometone, M
Powders and baits of organophosphorus insecticides such as PP, Acephe) and DEP are mainly used, but these agents lack stability in the soil and have historically had poor physical properties. Its control effect is extremely unstable because it is strongly affected by organic matter in the soil and soil texture.

Some of these, such as ethylthiometone, impart plant permeability and are effective against sweat-absorbing insect pests by transferring from the soil-mixed roots to the leaves, but there are many problems in terms of chemical damage and residue on crops.

Conventional nematicides such as EDB, DBCP, methyl bromide, and carbam are also used, but their applicability is limited to plant-parasitic soil nematodes, and they diffuse as gas in the soil, making them difficult to control for humans and animals. There are disadvantages such as toxicity, irritation, and limited planting period.

Recently, attempts have been made to apply birenuloid agents such as permethrin and fenvalerate, but it has become clear that they generally have problems with soil desorption and cannot be an effective means, and there is a strong need for the development of new pest control ingredients. There is.

[Problem that the invention seeks to solve]

The present invention overcomes the above-mentioned problems faced by various current soil treatment insecticides, has excellent stability in soil, and furthermore has no effect on organic matter in soil, soil texture, or climatic conditions by improving soil desorption properties. The purpose of the present invention is to provide a new type of soil treatment insecticide for agriculture and horticulture that stably provides high pesticidal effects without causing harmful effects, is safe, and does not cause chemical damage.

[Means and effects for solving the problem] As a result of extensive research by the present inventors, we found that dimethy)v(4-ethoxyphenyl)(3-(3-phenoxy-4-fluorophenylv)propylene) /I/1 silane (hereinafter referred to as compound A)
and octachlorodipropylethe/L/(hereinafter S-42
The present invention was completed based on the discovery that a soil treatment insecticide for agricultural and horticultural use containing the compound (referred to as 1) can achieve the intended purpose of the present invention.

It is already known as a compound that has high insecticidal and acaricidal activity and low toxicity to humans and livestock (Japanese Patent Application Laid-Open No. 61-87687).
In particular, it has high insecticidal activity against insect pests of Phylnoptera, aphids, planthoppers, etc., and its practical application in the field of agriculture and horticulture is being considered. It was thought to be unsuitable for use as a soil treatment insecticide because it is easily adsorbed by found materials.

However, when considering raw eggs of soil pests, the present inventors believe that basic insecticidal efficacy tests alone are inappropriate for evaluating insecticidal components of soil pests, and therefore conducted practical soil treatment tests for various compounds. After testing, we found that Compound A not only has excellent stability in soil, but also has a high control effect against soil pests such as scarab beetles and bed bugs.
It was discovered that it behaves differently from conventional pyrethroids.

In view of the fact that Compound A is an expensive insecticide compared to organic phosphorus agents and carbamate agents, the present inventors searched for a synergist for pyrethroid with the aim of reducing costs as a soil treatment insecticide. When performing this, compound A and 5-4
The combination with 21 shows a specifically high synergistic effect compared to other synergists such as piveronyl ptoxide, cynevirine 500, MOK-264, sesamin, sulfoxide, and N-A-16388. They discovered this and completed the present invention.

In addition to its contribution to insecticidal efficacy, the synergistic effect of S-421 is due to improved soil desorption properties, i.e., the addition of 5-421 reduces the adsorption of Compound A to humic plants, soil colloid particles, etc. in the soil. As a result, decomposition or immobilization of Compound A was suppressed.

Conventionally, synergists for pyrethroid such as S-421 are thought to exert a synergistic effect by inhibiting the vicariance decomposition of the active ingredient within the insect body, and the soil desorption properties disclosed in the present invention The synergistic effect based on the improvement of is completely inconceivable from conventional knowledge.

The soil treatment insecticide of the present invention may contain 0.05 to 80% by weight of compound A as an insecticidal component, and may contain 5-421% by weight of compound A.
Compound A and 8-4 exhibit a high synergistic effect when mixed with
The mixing ratio with 21 is 2:1 to 1:10 (preferably]:1
~1:5) is suitable.

If the mixing ratio is outside the above range, the desorption properties in the soil will not be improved and the control effect will be extremely unstable.

The dosage form of the soil treatment insecticide for agriculture and horticulture of the present invention may be a powder, depending on the properties of the insecticide and the purpose of use.

Various forms such as granules, emulsions, irrigation agents, suspension agents, and bait agents are possible.

Both formulations can be prepared according to conventional methods, and the solid carrier is clay (kaolin).

clays, etc.), talc, and other inorganic minerals (e.g. sericite, sulfur powder, activated carbon).

Examples include fine powders or granules of calcium carbonate, hydrated silica), chemical fertilizers (e.g., ammonium sulfate, ammonium phosphorus, ammonium nitrate, urea), etc. In addition, regarding powders, from the viewpoint of suppressing drift during spraying and preventing environmental pollution, powders with particle size distribution of 10 microns or less are cut to 20% or less of the total, such as Driftless Flare = (DT, Particularly useful are clays.

Liquid carriers include water, alcohols, aromatic hydrocarbons such as toluene and Kinlev, aliphatic hydrocarbons such as kerosene.

Kerosene, etc.), esters, nitriles, etc. can be used. Next, as surfactants, alkyl sulfate NTE μ and alkyl sulfonates are used.

Examples include algyl ρ aryl sulfonates, polyethylene glycol ethers, and polyhydric alcohol esters. Other appropriate casein, gelatin, starch H)
, cMc, polyvinyl alcohol, and other fixing agents and dispersants are used.

In addition, by microencapsulating or cyclodextrin inclusion of Compound A used in the present invention, BHT, Sumifizer BP-101 (Sumitomo Chemical brand name), vegetable oil, surfactant, alkyl, It/v. It is also possible to add stabilizers such as acid derivatives and gutuicols to increase chemical stability and obtain formulations with increased residual efficacy in soil.

Additionally, the compositions of the invention may contain other insecticides such as fenitrothion, isoxathion, MPP, acephate, DE
P, diazinon, organic phosphorus agents such as ethylthionthone, Calpos/Lefan, NkC.

Carbamate agents such as MTMC, BPMO, PHC.

Pyrethrin, allethrin, phthalthrin, fumetrin, phenothrin, permethrin, fenvalerate,
Conventional pyrethroid insecticides such as fluparinate and etofenbrox, insecticides or acaricides such as cartap, chlorphenamidine, and buprofezin, fungicides, nematicides, herbicides, insect growth disruptors, and plant growth regulators. , IIa, and other agricultural chemicals, a multipurpose composition with excellent effects can be obtained, labor savings, and synergistic effects between the drugs can be fully expected.

The agricultural and horticultural soil treatment insecticide of the present invention is for sweet potatoes.

Taro, tomato, eggplant, green pepper, radish, 9 carrots.

Scarab beetles that damage vegetables such as burdock, cabbage, strawberries, watermelons, kapocha, melons, corn, and potatoes (Dougan buibii, Hymeko beetles, Akabirod beetles, Black beetles, etc.), Helicoptera beetles (Kaburaya moth, Tamanaya moth, etc.), Army armyworms (Spodoptera spp. armyworm, etc.), cucurbit beetles, leaf beetles, seed flies, and onion flies.

Gourd weevils, kef, bed mites, pill bugs.

In history, it has shown a high insecticidal effect against plant-parasitic soil nematodes, such as springtail beetles, click woodpeckers, crickets, and longhorn beetles, as well as scarab beetles that live in turf grasslands, grasshopper moths, grass weevils, and longhorn beetles. A high control effect can be achieved either by mixing the soil before planting, or by spraying during growth.

Furthermore, the soil treatment agent of the present invention has a different mechanism of action from conventional organic phosphorus soil treatment insecticides and nematicides, and is extremely superior in terms of safety and prevention of mulberry damage.

〔Example〕

Next, the present invention will be explained in more detail using formulation examples, test examples, and examples, but it goes without saying that the present invention is not limited to these examples.

Formulation Example 1 Granule Compound A 3 parts, 5-4216 parts 9 synthetic hydrous silicon oxide 1 part, calcium ligninsulfonate 2 parts.

30 parts of bentonite and 58 parts of kaolin clay are thoroughly ground and mixed, water is added and the mixture is thoroughly kneaded, followed by granulation and drying to obtain granules.

11! ! +' Agent Example 2 15 parts of powder compound AO, 0 part of S-4212, and 0.05 part of stabilizer Sumilizer BF-101 (Sumitomo Chemical, trade name) were mixed with 8 stones HiC/L/5A3-296 (Nippon Oil Co., Ltd., trade name). ) and adsorbed on 10 parts of calcium carbonate and 2.0 parts of Carplex, 0.5 part of Toriless A (Sankyo, trade name) and 83.95 parts of DL clay.
After thoroughly mixing the parts, mix and crush with a hammer mill to obtain D.
T. Obtain powder.

Formulation Example 3 Emulsion Compound A 5 parts, 5=421 10 parts Sorbo-ρ5M-
200 (Toho Chemical, trade name), 20 parts of xylene, and 60 parts of white kerosene were added and mixed and dissolved by stirring well to obtain an emulsion.

Test Example 1 Specified dilution 2 of the following prescription emulsion prepared according to Formulation Example 3
0t/ is mixed with 500g of two types of soil (N3meeh) so that the active ingredient concentration in the soil is Q, 5ppm, and this soil is made into a diameter of 3.53mm. It was placed in a polyethylene cup with a diameter of 100 mm and a height of 10 mm along with 5 carrots having a thickness of 0.50 mm. After 1 day and 2 weeks, 10 3rd instar larvae of Anomalacuprθa were released, and the number of live and dead larvae was investigated 3 days after release to determine the mortality rate.The results were as follows.

1) Soil Ai Kuroboku soil with high organic matter content 2) Soil B;
As a result of a sandy soil test with low organic matter content, compounds A and 3
-421 combination specifically showed synergistic effects, while piveronyl butoxide, cinepirin 500. Synergists such as sesamin had little effect.

In addition, when diazinon or permethrin was used instead of compound A as an active ingredient (control insecticides 5 to 8), S
Although no synergistic effect of -421 was observed, it is presumed that the mechanism of action of these active ingredients and mid-life stability of the soil are involved.

When considering the soil properties of the test soils, it was found that sandy soils with low organic matter content generally had better insecticidal power, and in black soil, the effectiveness tended to be unstable, but Compounds A and 8
Only the composition of the present invention combined with -421 showed a high mortality rate regardless of the soil texture.

This is due not only to the synergistic contribution of the insecticidal efficacy of 5-421, but also to the addition of S-421, which improves soil desorption properties, reduces the adsorption of Compound A to organic matter in the soil, and suppresses immobilization. This is thought to be due to the fact that

Test Example 2 A soil treatment test was conducted using the following formulated emulsion according to Test Example, and the results were as follows.

As a result of the test, a high synergistic effect was observed by blending S-421 with Compound A, but when the mixing ratio of S-421 was too high (Sample & 7), it had a negative effect on soil desorption. , on the contrary, the efficacy decreased.

Therefore, it has been revealed that the appropriate mixing ratio of Compound A and 5-421, which exhibits a synergistic effect, is 2:1 to 110 (preferably 1:1 to 1:5).

Example 1 Part of compound AI, 5-4213 parts, 2 parts of diazinon, 9 parts of synthetic hydrous silicon oxide, 2 parts of calcium lignin sulfonate
1 part, 30 parts of bentonite, and 61 parts of kaolin clay were thoroughly ground and mixed, water was added, the mixture was thoroughly kneaded, and the mixture was granulated and dried to obtain granules.

Before cutting sweet potato seedlings, apply 10a of fertilizer to the base of the furrow. 9
It was sprayed 5 to 9 times and mixed well with the soil.

After the ridges were raised, the cultivation was covered with vinyl mulch, and it was possible to control the damage caused by scarab beetles, such as the Japanese brown beetles and the Japanese red beetles, as well as soil pests, such as the mole crickets and the white beetles, and no chemical damage was observed.

Example 2 0.5 parts of Compound A and 2.0 parts of 5-421 were mixed with 8 stone HiC/l/SA S-296 (Nippon Oil Co., Ltd., trade name) 1.
0 parts of Carplex, 2.0 parts of Tripropylene Gefico/l'1. After adding o parts and 93.5 parts of DL clay and mixing well, the mixture was mixed and pulverized using a hammer mill ρ to obtain a DL dressing.

When sowing soybeans and green beans, 10a per hole in the seeding hole, 93
When I applied it and mixed it well with the soil, there was almost no damage from seed flies.

Example 3 Compound A 10 parts, 5-42110 parts, So/Repol 24
95 (Toho Chemical, trade name) 2 parts, Sunextract P-201
(Sanyo Kokusaku Pulp, product name) 2 parts, white carbon 1
5 parts of kaolin clay and 61 parts of kaolin clay were uniformly mixed in a mixer to obtain a wettable powder containing 10% of the active ingredient.

When a 2,000-fold dilution of this irrigation agent is applied to lawns infested with rice weevil, the progress of the damage can be completely suppressed, and there are no chemical damage to the lawn or toxicity to nearby aquatic fish and shellfish. There wasn't.

〔Effect of the invention〕

The agricultural and horticultural soil treatment insecticide of the present invention has excellent stability in soil, provides stable and high pest control effects regardless of the soil texture and weather conditions of the applied soil, and is safe and prevents chemical damage. It is an extremely practical formulation because of its excellent properties.

[Brief explanation of drawings]

FIG. 1 shows the relationship between the concentration of each component of Compound A and S-421 in Test Example 2 and the mortality rate in test soil A, and the area above the dotted line shows the synergistic action area. Patent applicant: Eisuke Kamiyama, Representative Director of Dai 11 Kijo Mugiku Co., Ltd.

Claims (1)

[Claims] An agricultural and horticultural soil treatment insecticide characterized by containing dimethyl-(4-ethoxyphenyl) {3-(3-phenoxy-4-fluorophenyl)propyl}silane and octachlorodipropyl ether