JP2698925B2 - Attracting male adults of the scale insects - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to
Pentagona Targioni), and more particularly, to a method for attracting male adults of Pseudococcidae, which is characterized by attracting male adults of Pseudococcidae by yellow coloration. It is an object of the present invention to provide a method for attracting male adults of the Japanese scale insect, which can be performed efficiently.

BACKGROUND OF THE INVENTION Pseudaulacaspis Pentagona
Targioni) is a pest of the family Hemiptera: Aphididae on tea, mulberry, cherry, apple, persimmon, pear, peach, grape, azalea, azalea, oak, willow, walnut and paulownia, and is distributed throughout Japan. .

The stag beetle grows on the tree, and the snout is inserted under the tree to absorb the sap. Therefore, the vigor of the tree decreases, the germination and flowering are delayed, and when the damage is severe, the branches and the whole tree may die.

Particularly with respect to tea, in recent years, the damage has increased and has become a major problem. In the case of tea, the adults and larvae of the scale insects parasitize the trunk of the tea plant and suck up. Therefore, the shoots do not elongate, the leaves turn yellow and fall, and the trunks are weakened and die. Especially when the occurrence is large, the tea plant is completely devastated and there is no harvest.

(Prior art) Conventionally, chemicals have been sprayed as a method of controlling pests such as white scale insects, whiteflies and aphids.
Emulsions, DN agents, and machine oil emulsions are being sprayed.

In addition, other methods have been devised in view of the contamination of agricultural products by chemicals and the safety of workers.
No. 79 discloses a method for controlling insect pests using a tape-shaped string impregnated and impregnated with an insecticide.

(Problems to be Solved by the Invention) The female adult of the scale insects of the Japanese white scale insects lay eggs under the shell of the wax substance and hatch into larvae in about 10 days. The larva emerges from under the shell and adheres to the trunk in about half a day, secretes wax material to form a shell, and the female becomes an adult after molting three times and lives under the shell, while the male is 2 After molting, it becomes an adult through pupae and flies. Thereafter, generations are repeated three or four times, and females winter in an adult state, but male adults do not survive in winter because they are short-lived for one to two days.

Therefore, the time when the control effect is obtained by spraying the drug is very short, just after the hatching of the larva and the emergence period of the male adult. In addition, both the larvae and the adults of the Japanese scale insects were extremely small, about 1 mm, and it was extremely difficult to determine an appropriate control period.

Furthermore, the white scale insects may be symbiotic (or parasitized) with the genus Septobasidium of the jellyfish family and cause a plaster disease. After the outbreak, the bacteria and shells covering the green scales are scraped off. Therefore, a complicated operation of directly spraying a 40-fold solution of a lime-sulfur mixture on the white scale was required.

In some test sites, suction traps are used to investigate the occurrence of male adults of the scale insects, but these traps are expensive and time-consuming to install. Not popular.

In addition, investigations on the optimal time to control pests are usually carried out by attracting sights, pheromones, bait, etc. by odors and colors, but no effective method for attracting adult males of the Japanese scale insects has yet been created. .

In addition, the method of controlling pests using a tape-like string coated and impregnated with an insecticide as described above does not require an appropriate time period for controlling, and there is no danger of contamination of agricultural products and the like by the chemicals and workers. However, since it was not possible to positively attract and capture male adults of the scale insects, the efficiency of capture was poor and it was not possible to completely control them.

In view of the above situation, there has been a demand in the industry for a method of attracting male adults of the scale insects that can be easily implemented and that is efficient.

(Means for Solving the Problems) According to the present invention, the corrected Munsell value is 5YR to 10YR, 2.5Y to 10YR.
The present invention relates to a method for attracting male adults of the scale insects, which are characterized by attracting with Y, a yellowish colored substance of 1.25 GY to 6.25 GY.

(Constitution of the invention) The method for attracting male adults of the scale insects according to the present invention is a method for attracting male adults of the scale insects, which is characterized by mainly attracting with a yellowish colored body having a specific Munsell value, Yellow means yellow-red, yellow, yellow-green.

As a yellowish colored body, modified Munsell value 5YR to 10YR,
A yellowish colored body of 2.5Y to 10Y and 1.25GY to 6.25GY is used, whereby male adults of the scale insects can be surely attracted. It should be noted that a yellowish colored body whose corrected Munsell value is not included in the above range is not preferable because the effect of attracting male adults of the scale was not sufficiently exhibited.

In the present invention, the yellowish colored body may be a substrate having at least one surface made yellowish, and its shape is not particularly limited to a flat plate, but may be any shape such as a prism, a cylinder, a cone, and the like. Is also good.

The substrate is a plastic plate such as polyvinyl chloride, polypropylene, polyethylene or the like formed by blending and molding the yellow dye, pigment, or the like itself, and other molded products thereof.
Alternatively, similarly colored paper, nonwoven fabric, woven fabric, knitted fabric and the like can be mentioned.

Further, even in a substrate colored other than yellow, at least one surface, the yellow ink, primer,
Colored or laminated with colored paper, cloth, tape, sheet, film, adhesive, etc. to form a yellow colored layer,
In addition, any base material may be used as long as the base color of a single substance is colored other than yellowish which does not affect the attraction effect of the yellowish colored layer at all.

In the present invention, if the purpose is not only to attract male adults of the scale insects, but also to investigate the control and appropriate period of control by performing capture, an adhesive layer may be laminated on the surface of the substrate. .

In this case, as described above, the colored substance having a rubber or a synthetic resin-based adhesive layer colored with the yellow dye or pigment as described above, or when the base itself is already colored yellow, the surface thereof is If a transparent pressure-sensitive adhesive layer is laminated, attraction and capture can be easily performed.

The pressure-sensitive adhesive layer may be directly applied to the substrate. May be.

According to the method for attracting male adults of the scale insects of the present invention, the yellowish colored body is installed within 1 m of the affected crop or site within 1 m so that the yellowish colored body faces the crop. The male adult of the scale is induced by the yellow colored body and flies, and particularly when the yellow colored body has an adhesive layer, the male adult of the scale can be captured.

(Effects of the Invention) In the present invention, the modified Munsell value is 5YR to 10YR, 2.5Y to 10YR.
Y, because it relates to the method of attracting male adults of the scale insects, which is characterized by attracting with a yellowish colored body that is 1.25 GY to 6.25 GY, males of the scaled scales are only required to install the yellowish colored body Adults can be attracted and captured, and can be easily implemented.

In addition, by counting the number of attracted insects, it is possible to determine the emergence time of the male adult of this scale, and to accurately know the time of spraying the drug, and to prevent wasteful use of harmful drugs. Can be.

Further, by laminating the pressure-sensitive adhesive layer on the substrate surface of which at least one surface is yellowish, it is possible to attract and capture male adults of the scale insects. In addition, since this hornworm is breeding only by sexual reproduction and the lifespan of male adults is as short as 1 to 2 days, it also has the effect of reducing the number of the next generation by capturing, and eradicate without using drugs It is also possible.

The effects of the present invention will be further clarified by showing examples.

(Example 1) A yellow polyvinyl chloride plate having a modified Munsell value of 7.5Y was used.
It was installed with a pole 15 cm above the top of the tea ridge.

Twenty-four hours later, the yellow plate was photographed, and the number of male adults of the scale was measured.

As a result, 73 male adult scaleworms were found within an area of 20 cm × 20 cm.

(Example 2) A transparent adhesive was applied to the entire surface of one side of a transparent and thin film, and a double-sided tape was attached to an end of the film, and the film was adhered to the surface of the yellow plate used in Example 1. It was stuck so that the agent surface was on the outside to prepare a yellowish colored body.

This yellowish colored body was placed on a brown ridge in the same manner as in Example 1, and the film with the adhesive was changed every two days to obtain a 20 cm ×
The number of male adult scaleworms captured within a 20 cm area was counted.

 The results are shown in Table 1 below.

From the above results, by the method of attracting male adults of the Japanese scale insects according to the present invention, male adults of the Japanese scale insects are attracted to the yellowish colored body, captured, further, by counting the number of insects captured, the drug It can be seen that it is easy to determine the spraying time.

Claims (4)

(57) [Claims] The modified Munsell value is 5YR to 10YR, 2.5Y to 10Y,
Pseudaulacaspis Pent, which is attracted by a yellowish colored body of 1.25 GY to 6.25 GY
agona Targioni). 2. The male of the scale insects according to claim 1, wherein the yellowish colored body is formed by laminating an adhesive layer on a substrate surface of which at least one surface is yellowish. How to attract adults. 3. The yellow colored body according to claim 1, wherein the yellow colored body is composed of a non-yellow base surface and a yellow colored layer formed on the surface. A method for attracting male adults of the Japanese scale insect. 4. The kwashiro according to claim 3, wherein the yellow colored layer is at least one selected from the group consisting of a yellow ink layer, a yellow adhesive layer, and a yellow laminated layer. A method for attracting male adults of the scale insect.