JPH06157218A - Agent for controlling japanese pine engraver and method for preventing withering of pine using the agent - Google Patents

Abstract

PURPOSE:To provide an agent for controlling Japanese pine weevil excellent in all properties such as controlling effect, safety, residual activity and applicability and having extremely high practicality and to provide a method for preventing the withering of pine using the agent. CONSTITUTION:The agent for controlling Japanese pine weevil contains (4- ethoxyphenyl) [3-(3-phenoxy-4-fluorophenyl)propyl] (dimethyl)silane and a fixing agent. The withering of pine tree can be prevented by the single scattering of the agent.

Description

Detailed Description of the Invention

[0001]

The present invention relates to (4-ethoxyphenyl) [3- (3-phenoxy-4-fluorophenyl)
TECHNICAL FIELD The present invention relates to a pine beetle control agent containing propyl] (dimethyl) silane and a fixing agent, and a method for preventing pine damage using the same.

[0002]

2. Description of the Related Art At present, pine wilt damage caused by pine beetles is widespread in a wide range of places, which poses a problem, and its prevention is strongly desired. Regarding the cause of this pine wilting, the following theory is influential, based on many years of various studies. In other words, from the pine tree that died in the previous year, the pine wood chafer ejaculates with numerous pine wood nematodes in its body, but when this pine wood chamomile eats after a healthy pine twig, the pine wood pine tree leaves It is said that the nematodes invade the pine tree, and this pine wood nematode disperses and proliferates throughout the resin path from the branches to the trunk over the course of time to destroy the flexible cells of the resin path. And the pine wilt beetle lays eggs on the bark of the weakened pine, and the hatched larvae grow while eating the skin under the bark and eventually dig a hole in the material to make a pupa chamber, and overwinter as the larvae.
When it becomes a pupa in the spring and emerges as an adult in May, and emerges as an adult, the pine wood nematode is transferred to the body, and the damage of pine wilting is rapidly increased.

The following methods are available to prevent this pine wilting. Prevention of post-eating of emerged chamomile: When adult chamomile adults emerged from a dead tree post-eat a healthy young branch, nematodes leave the body of the chamomile and invade the pine tree. It is known that it is effective to spray a drug on the canopy part of a healthy pine tree at a suitable time to kill the beetle. This can be done from the ground using a power sprayer, a backpack type automatic sprayer, a sprinkler, or a method of spraying in the air using a helicopter. Carbaryl (NAC) is used. However, these agents have problems such as insufficient extermination effect, short residual effect, and need to be sprayed twice or more from May to July, and fear that the environment and human livestock may be affected. Therefore, development of an appropriate alternative drug is strongly desired. Insect killing larvae in dead trees: In order to reduce the density of chamomiles, the carrier of nematodes, the larvae of kamikiri cut down dead trees that are under the bark or in the wood, incinerate the bark, and organically treat fenitrothion and fenthion. Disperse an oil solution of a phosphorus agent or a carbamate agent such as carbaryl, or an emulsion. Furthermore, killing larvae of beetles by spraying insect-parasitic nematodes and microbial preparations on felled dead trees has been studied. Killing of chamomile by attractant, repellent, prevention of aftergrowth by antifeedant: Benzoic acid-eugenol mixture, α-pinene-ethanol mixture as attractant, while repellent,
Eucalyptus oil and the like have been studied as an antifeedant, but it is difficult to achieve a practically sufficient control effect. Use of nematicides: Nematicides for tree trunk injection or soil application have been tested with the aim of killing nematodes invading pine trees, for example methylphenfos, levamisole hydrochloride, morantel tartrate as tree trunk injection agents. While ethylthiomethone, mesomil, etc. were effective as soil treatment agents, there are many practical problems. Breeding of resistant pine: Selective breeding and cross breeding have been attempted to grow resistant pine that does not die even if nematodes invade, but it has not been technically established yet.

[0004]

Under the above circumstances,
The most practical is the development of a suitable agent for preventing the post-eating of the emerged chamomile, and the present invention solves the problems of conventional organophosphorus agents or carbamate agents.
It is an object of the present invention to provide a pine beetle control agent which is satisfactory in terms of control efficacy, safety, usability, and the like, and a method for preventing pine damage using the agent.

[0005]

[Means and Actions for Solving the Problems] In order to achieve the above object, the inventors of the present invention have conducted extensive studies, and as a result,
(4-Ethoxyphenyl) [3- (3-phenoxy-4
By using -fluorophenyl) propyl] (dimethyl) silane (hereinafter referred to as silafluophene) and a fixing agent, it is possible to obtain an epoch-making pine beetle control agent which is excellent in all respects, and therefore, effective pine damage. The present invention has been completed by finding that it can provide a prevention method.

Silafluofen, which is an insecticidal component of the present invention, is a known compound and is excellent in safety and stability under field conditions, and highly insecticidal to insect pests of the order Lepidoptera, planthoppers, agricultural insects such as leaf beetles, and termites. From the fact that it shows efficacy, it is being put to practical use as a pesticide and termite control agent, but it is also recognized that it exhibits excellent insecticidal efficacy and residual efficacy against pine beetle typified by pine wilt beetle. It was The pine beetle control agent of the present invention may contain 0.1 to 95% by weight of silafluofene, and is usually prepared into an emulsion, an oil, a granule, a wettable powder or the like, and used by appropriately diluting to a desired concentration. It

The present invention is characterized in that a sticking agent is used in combination to further enhance the residual effect of silafluofene. Examples of the fixing agent include, but are not limited to, polyethylene resin emulsion, polyoxyethylene rosin ester, rosin ester, vinyl acetate / acrylic emulsion, polyethylene glycol and the like. Usually, the concentration of the sticking component used is sufficient to be 0.01 to 10%, and it may be blended in the preparation, or may be prepared at the time of use and mixed with the silafluofene spray solution at the time of use. According to the present invention, conventional pine beetle control agents such as organic phosphorus agents and carbamate agents require two or more sprays over 5 to 7 months because of their short residual effect.
It was confirmed that the effect of the sticking agent further improved the residual effect of silafluofene, and that the insecticidal effect could be maintained for a required period by a single application. Considering the labor, cost, environmental impact, etc. of spraying, it can be said that reducing the spraying frequency from 2 times to 1 is a very effective and practical advantage.

If necessary, auxiliary agents such as solid carriers, liquid carriers, various surfactants and organic raw materials may be added to the pine beetle control agent of the present invention. Examples of solid carriers include clays (kaolin, bentonites, etc.), talc and other fine powders or powders, and liquid carriers include:
Water, alcohols, aromatic hydrocarbons (eg toluene, xylene etc.), aliphatic hydrocarbons (eg kerosene, kerosene etc.), esters, nitrites etc. can be used. Examples of the surfactant include alkyl sulfates, alkyl sulfonates, alkylaryl sulfonates, polyethylene glycol ethers, polyhydric alcohol esters and the like. Other cases such as casein, gelatin, starch powder, carboxymethyl cellulose, polyvinyl alcohol, polyethylene glycol,
A fixing agent such as sodium polyacrylate, gum arabic or xanthan gum, a binder, a thickener or a dispersant is used.

Furthermore, the pine beetle control agent of the present invention comprises:
Piperonyl butoxide and Cinepyrine 50 if necessary
0, S-421 and the like synergists and BHT, DBH, Yoshinox 425 and the like stabilizers may be appropriately added to improve the control efficacy and chemical stability. Not only can each formulation be used alone, pyrethroids such as phenothrin, permethrin, etofenprox, organophosphorus agents such as fenitrothion and diazinon, various insecticides including carbamate agents such as carbaryl, acaricide, bactericide Agents, herbicides, pest repellents, attractants,
A useful multipurpose composition can be obtained by appropriately blending a flavoring agent, a bittering agent, a coloring agent and the like.

In actual use, for example, in the case of spraying on the ground, an emulsion or the like is used as a silafluofene concentration of 0.1 to 0.1%.
After diluting to 5.0%, 100-2000 l per ha may be sprayed on the crown of the pine tree, while in the case of aerial spraying,
It is suitable to spray a stock solution or diluting solution having a silafluofene concentration of 0.2 to 80% in an amount of 5 to 200 l per ha. Here, the fixed component is 0.01 to 1 in the spray liquid.
Needless to say, it is prepared so as to contain 0%.
Thus, the pine shoots sprayed with the pine beetle control agent of the present invention does not invite the invasion of the pine wood nematode because there is almost no aftergrowth by the pine wood chafer, and the insecticidal effect of silafluofen causes the pine wood chamomile It can greatly reduce the population density. Furthermore, in the control agent of the present invention, the residual effect of silafluofene,
Since the effect of the adhesive agent is combined, the number of times of spraying is reduced from the usual 2 times to 1 time, so that an extremely efficient and practical method for controlling pine beetle, that is, a method for preventing pine damage is provided.

In order to further clarify that the pine beetle control agent of the present invention and the method for killing pine trees are excellent, the test results of Examples and effects are shown below.

[0012]

Example 1 80 parts of silafluofene and Solpol S
10 parts of M-200 (registered trademark of Toho Kagaku) and 10 parts of a solvent were added, and these were well mixed with stirring to obtain an emulsion. This drug was diluted 200-fold with water (silafluofen concentration was 0.1%).
4%), and a polyethylene resin emulsion-based adhesive was added to this so that the concentration would be 0.3%, and the mixture was sprayed on the pine trees from the ground with a power sprayer at 1200 l / ha.

[0013]

Example 2 20 parts of silafluofene and Solpol S
M-100PD (registered trademark of Toho Chemical Industry Co., Ltd.) 30 parts, vinyl acetate / acrylic emulsion-based adhesive 0.5%, water 4
9.5% was added, and these were well mixed with stirring to obtain an aqueous emulsion. 30l / ha from a helicopter without diluting this agent
It was sprayed in the air at a dose of.

[0014]

[Test Example 1] At a test site where 7-year-old black pine is vegetated, a predetermined dilution of each sample emulsion prepared according to Example 1 was used with a fully automatic sprayer, and the proportion of the chemical solution dripping from the branches and leaves was measured. (1200 l / ha). 14 days, 28 days, 42 days, and 56 days after spraying, 2 to 3 year old branches are cut off and given to healthy pine wood beetles, excluding needles, and bred at 25 ° C and the mortality rate and post-meal amount after 7 days. When measured, it was as shown in Table 1. The amount of after-meal was calculated from the following formula. Ycm ² = 0.214 + 0.575X [X = length (c
m) x maximum width (cm)]

[0015]

[Table 1]

As a result of the test, the pine beetle control agent of the present invention containing silafluofen as an insecticidal component and also using a sticking agent showed an excellent aftergrowth prevention effect and insecticidal effect for about 2 months. On the other hand, the conventional pine beetle control agents containing fenitrothion, an organic phosphorus agent, and carbaryl, a carbamate agent, had a short residual effect and required at least two or more spraying times even when a fixing agent was used in combination. Although the formulation of silafluofen without addition of a sticking agent showed a considerable effect of preventing aftergrowth, it was not sufficient, and the usefulness of the combined use of a sticking agent was confirmed. According to the standard of this test,
When the after-meal amount is 1.25 cm ² or less, it is said to be effective as a control agent.

[0017]

EFFECTS OF THE INVENTION The present invention provides a pine beetle controlling agent which is satisfactory in all respects such as post-eating prevention effect, safety, residual efficacy, and usability by pine wood chafer, and an efficient and practical use thereof. Provide a method of dying pine trees.

Claims (2)

[Claims] 1. (4-Ethoxyphenyl) [3- (3-
Phenoxy-4-fluorophenyl) propyl] (dimethyl) silane and a sticking agent. 2. (4-Ethoxyphenyl) [3- (3-
Phenoxy-4-fluorophenyl) propyl] (dimethyl) silane and a pine beetle control agent containing a sticking agent are sprayed once, and a method for preventing pine death is characterized.