JPH04243802A - Noxious insect attracting agent - Google Patents

Abstract

PURPOSE:To obtain a noxious insect capable of exhibiting excellent attractive effect to Parapediasia teterrella and Spodoptera depravata which are noxious insects of Gramineae plant. CONSTITUTION:(11Z)-Hexadecenal and (9Z)-hexadecenal are used as active ingredients to Parapediasia teterrella and (9Z,12E)-tetradecadienyl acetate is used as an active ingredient to Spodoptera depravata and the above-mentioned compounds are used in combination in order to simultaneously attract both noxious insects to provide a excellent attracting agent.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an attractant that exhibits an excellent attracting effect on grass moths and cutworms as insect pests of grasses.

0002

BACKGROUND OF THE INVENTION In recent years, grass moths and cutworms have become particularly important as grass pests. Shibatsutoga (scientific name: Parapediasia)
Zincken (common name: Bluegrass webworm) is a pest that builds nests out of plants and soil grains, and the larvae inside the nests damage turfgrass. Although damage caused by Shibatsutomo does not occur much in Hokkaido and Tohoku, it occurs every year in the plains west of the Kanto region, and since 1968, it has caused extensive damage to the lawns of golf courses in Japan.

[0003] Shibatsutoga occurs three times a year, and the adults are nocturnal. The larvae feed on the soft parts of the new shoots, and
They make their nests by spinning dead leaves, sand grains, etc. with spun silk, and live inside them. Since the larvae grow extremely quickly, the damage to turf grass progresses rapidly, and it is not possible to stop the damage by controlling it after the damage has started, so it is necessary to control the number of adult insects in advance.

On the other hand, Spodo (scientific name: Spodo)
ptera depravata (Butler
), common name: Lawn grass cutworm)
In the spring, it damages the roots of trees and grasslands in spots, so it can be mistaken for lesions in the early stages. If you are not careful during this period, damage will occur to the entire lawn from summer to autumn.
Large areas of dead grass become noticeable among the lush grass. Because the damage caused by striped armyworm is underground, the adults are nocturnal, and the insects often appear three times a year, it is difficult to manage large areas of grassland such as golf courses.
The damage progresses unnoticed and results in major damage. In particular, on golf courses, the occurrence of striped armyworm on the rough is often not noticed, which is a major cause of the deterioration of the rough, and this also becomes a source of infestation on grassy areas, creating a vicious cycle.

[0005] Spraying chemicals on the adults and eggs of the above-mentioned Shibatsutomo and Sujikiri armyworm is not very effective, so various emulsions such as Ortolan hydrating agent, Guardside hydrating agent, Salithion, EPN, Toction, Diazinon, Sumithion, etc. are applied to the larvae. A scattering method is used.

[0006]

[Problems to be solved by the invention] However, these pests occur three times a year, the timing of their occurrence is not always constant, and when spraying insecticides, the active ingredient easily decomposes, so the insecticidal effect does not last for a long time. Problems include that it is difficult to maintain insecticides, and that insecticides are not effective because the larvae to be controlled live underground. Therefore, in order to increase the pest control effect, it is necessary to increase the number of times insecticides are sprayed, but since it is difficult to predict the occurrence of insecticides, it is not possible to determine the exact time of pest control, and efficient pest control is not possible despite the high cost. The problem is that the effects cannot be expected. Continuous spraying of insecticides also causes resistance and environmental pollution problems. Therefore, an object of the present invention is to provide an attractant that can effectively investigate the development and development of the above-mentioned Shibatsuto moth and Sujikiri armyworm, or control them by attracting and killing a large number of male adults.

[0007]

[Means for Solving the Problems] The present inventors have conducted intensive studies to achieve the above object, and have found that it is difficult to attract the above pests using a specific compound as an attractant. Since the occurrence of these pests can be accurately predicted, it is possible to know when to control them, and as a result, it has been found that they can be efficiently controlled even with conventionally used insecticides. Furthermore, it is generally said that when different attractants are used in combination, they affect the attracting effects of each other and cannot exhibit the attracting effect as much as when used alone; however, the present invention surprisingly provides It has been found that such a decrease in effectiveness does not occur even when an attractant for Shibatsuto moth and an attractant for striped armyworm are used in combination, and these two types of pests can be attracted at the same time.

[0008] That is, the present invention provides a first invention of an insect pest attractant for snail moth containing (11Z)-hexadecenal and (9Z)-hexadecenal as active ingredients;
, 12E)-Tetradecadienyl acetate is the second invention, (
A third aspect of the present invention provides a pest attractant capable of simultaneously attracting grasshopper moths and cutworms, which contains 11Z)-hexadecenal, (9Z)-hexadecenal, and (9Z,12E)-tetradecadienyl acetate as active ingredients.

[0009] The compound used in the pest attractant of the present invention was discovered as a result of searching for a compound that has an attracting effect, and for Shibatsuto moth, a mixture of (11Z)-hexadecenal and (9Z)-hexadecenal is used. is effective, and against striped armyworm (9Z, 12E)
)-tetradecadienyl acetate is effective, and a mixture of these compounds exhibits an attractive effect on both pests.

[0010] The above-mentioned mixture exhibiting an attracting effect on Shibatsutomo has a mixing ratio ((11Z)-hexadecenal/(9Z)-hexadecenal) of 100/1 to 1.
/1, preferably 50/1 to 5/1, exhibits an excellent attracting effect.

[0011] The above-mentioned active ingredients in the attractant of the present invention are:
It can be used as an attractant as it is, or diluted with any diluting solvent such as acetone or dichloromethane. In addition, these attractants may be used as they are, but they can also be formulated into a formulation by being supported on a carrier of any shape such as a cotton swab, plastic material, rubber material, etc. by means such as impregnation or adsorption. . The amount of the attractant of the present invention to be used can be appropriately determined depending on the usage environment, but usually, in order to attract Shibatsuto moth per preparation, a mixture of (11Z)-hexadecenal and (9Z)-hexadecenal is used at a concentration of 0.05 to 10 mg, preferably about 0.1 to 5 mg, and for attracting striped armyworm, about 0.05 to 10 mg, preferably about 0.1 to 5 mg, of (9Z,12E)-tetradecadienyl acetate.
When attracting both types of pests, the amount used should be approximately the total amount used when attracting the above individual pests.

[0012] The pest attractant of the present invention can also be placed in a trap container to capture the attracted pests.
It is also possible to kill captured pests by filling the container with water. Moreover, the pesticidal effect can be improved by using a conventionally used insecticide and the attractant of the present invention together.

[0013]

[Examples] Examples are shown below to specifically explain the attracting effect of the pest attractant of the present invention.

Example 1 2.9 mg of (11Z)-hexadecenal and (
An attraction trap was prepared by installing a cap-shaped carrier made of a rubber material impregnated with a mixture of 0.1 mg of 9Z)-hexadecenal.

Example 2 In Example 1, the attractants were (11Z)-hexadecenal 1.1 mg and (9Z)-hexadecenal 0.09 m
An attraction trap was produced in the same manner as in Example 1, except that the mixture was mixed with g.

Example 3 In Example 1, the attractants were (11Z)-hexadecenal 0.99 mg and (9Z)-hexadecenal 0.02 mg.
An attraction trap was produced in the same manner as in Example 1, except that the mixture was mixed with mg.

Comparative Example 1 An attraction trap was prepared in the same manner as in Example 1 except that 2 mg of (11Z)-hexadecenal was used as the attractant.

Comparative Example 2 An attraction trap was prepared in the same manner as in Example 1 except that 2 mg of (9Z)-hexadecenal was used as the attractant.

Comparative Example 1 In Example 1, only an adhesive trap was prepared without using the attractant of the present invention.

[0020] The traps prepared in each of the above Examples, Comparative Examples, and Control Examples were placed in the grass area (approximately 25 ares) of a golf course in September, with a gap of 50 m or more between each trap, before sunset. It was placed in The next day, each trap was collected and the total number of Shibatsuto moths attracted and captured in one day was determined three times on different days, and the results are shown in Table 1.

[0021]

[Table 1]

Example 4 In the center of the adhesive trap used in Example 1, (9Z
, 12E) - A cap-shaped carrier made of a rubber material impregnated with a mixture of 1 mg of tetradecadienyl acetate was installed to prepare an attraction trap.

Comparative Example 2 In Example 4, only an adhesive trap was prepared without using the attractant of the present invention.

[0024] The traps prepared in Example 4 and Comparative Example 2 were placed one each in the grass area (approximately 25 ares) of a golf course in September with a gap of 50 m or more between each trap before sunset. did. The next day, collect each trap and
The operation of examining the total number of striped armyworms attracted and captured on a given day was carried out three times on different days, and the results are shown in Table 2.

[0025]

[Table 2]

Example 5 In the center of the adhesive trap used in Example 1, (11
A cap-shaped carrier made of a rubber material impregnated with a mixture of 2.9 mg of Z)-hexadecenal and 0.1 mg of (9Z)-hexadecenal, and a rubber impregnated with 1 mg of (9Z,12E)-tetradecadienyl acetate. Attraction traps were fabricated by placing cap-shaped carriers made of raw materials in parallel.

Comparative Example 3 In Example 5, only an adhesive trap was prepared without using the attractant of the present invention.

[0028] The traps prepared in Example 5 and Comparative Example 3 were placed one each in the grass area (approximately 25 ares) of a golf course in September, with a gap of 50 m or more between each trap, before sunset. did. The next day, collect each trap and
The operation of checking the total number of striped armyworms attracted and captured on a given day was carried out three times on different days, and the results are shown in Table 3.

[0029]

[Table 3] A: Shibatsutoga, B: Sujikiriyotou

[0030]

[Effects of the Invention] As mentioned above, the pest attractant of the present invention has an excellent attracting effect on Shibatsuto moth and Sujikiri armyworm, so it is easy to predict the occurrence of pests, and it is possible to effectively control pests using insecticides. It is also possible to attract and capture these pests by combining it with a trapping container. Further, according to the present invention, it is possible to simultaneously control the insect pests such as the staghorn moth and the cutworm.

Claims (3)

[Claims] Claim: 1. A pest attractant for Shibatsuto moth containing (11Z)-hexadecenal and (9Z)-hexadecenal as active ingredients. 2. An insect attractant for cutworms containing (9Z,12E)-tetradecadienyl acetate as an active ingredient. Claim 3: (11Z)-hexadecenal and (9Z)-hexadecenal and (9Z,12E)-
A pest attractant that contains tetradecadienyl acetate as an active ingredient and can simultaneously attract Shibattutomoth and Sparrowworm.