Method suitable for controlling pests by releasing parasitic wasps in paddy field and release devices

Abstract

The invention discloses a method suitable for controlling pests by releasing parasitic wasps in a paddy field. A counter-weight is injected into a bearing space of a releasing device, and ova used for breeding the parasitic wasps are put into a host ovum space; then a cover is buckled onto each cup to form a whole body; the release devices containing the parasitic wasps are uniformly thrown into the paddy field and float on the water surface automatically, the parasitic wasps climb out from outgoing holes actively after eclosion of the ova of the parasitic wasps and search pest host ova; when the parasitic wasps are released in the field, operators can throw the release devices with certain weights into the paddy field on ridges of the paddy field instead of going into the paddy field, under the action of gravity, the bottom of each release device falls into the water first, and under the action of buoyancy force of the outer edge of each cup, each release device can not sink underwater, each upper space holding trichogramma can float on the water surface, even a little amount of water enters from the outgoing holes, and the water flows into a lower space containing sand through a funnel-shaped clapboard in each release device; the method can be used for preventing a predatism natural enemy from eating the host ova, can prevent rain and water accumulation, and realizing the mechanized production. The release devices are all made from a corn starch biodegradable material which can be degraded within about six months under natural conditions, and can not pollute the environment.

Description

technical field [0001] The invention discloses a method suitable for releasing parasitic wasps in paddy fields to control pests, and provides a corresponding releasing device, belonging to the technical field of biological control of agricultural pests. Background technique [0002] Rice is the main grain crop in my country, accounting for 26% of the total arable land and about 43% of the total grain output. There are more than 30 kinds of common pests that damage rice. Among the major pests of crops in my country, rice pests account for more than half. Among them, some species of pests occur all the year round, such as rice borer, rice borer, rice borer, rice leaf roller, brown planthopper, etc.; some species occur in local areas, such as rice bract moth and rice negative mudworm; Large occurrences, such as armyworm; some are newly introduced pests, such as rice water weevil. Among these pests, most species belong to the order Lepidoptera, which cause serious economic lo...

AI Technical Summary

Problems solved by technology

The design and use of these bee releasers are basically limited to the control of lepidopteran pests on field crops or forestry, without considering the special environment of rice plants and paddy field operations. When using these bee release devices to release Trichogramma in paddy fields, it is necessary to go to the field Manual suspension, very inconvenient to operate

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