Method for reducing base number of pests in rice field by using entomopathogenic nematodes

A technology of entomopathogenic nematodes and application methods, applied in the field of using entomopathogenic nematodes to reduce the base number of rice field pests, can solve problems such as no control effect, reduce labor costs and material costs, and achieve simple and easy-to-operate application processes and realize the use of pesticides Effect

Active Publication Date: 2020-11-27
HUNAN RICE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method utilizes entomopathogenic nematodes to be limited to the parasitic control of Chilo borer larvae, and there is no report of control effect on the larvae of rice water weevil and other pests and the pupae of parasitic control pests.

Method used

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  • Method for reducing base number of pests in rice field by using entomopathogenic nematodes
  • Method for reducing base number of pests in rice field by using entomopathogenic nematodes
  • Method for reducing base number of pests in rice field by using entomopathogenic nematodes

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Experimental program
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Effect test

Embodiment 1

[0044] From October 2019 to July 2020, experiments were carried out in 80 mu of rice fields in Lingling District, Yongzhou City, Hunan Province.

[0045] 1. When the first season rice (late rice in 2019) is harvested, the rice is harvested with low piles, and the height of the rice piles is 10cm;

[0046] 2. Irrigate the harvested paddy fields so that the depth of the water layer in the paddy fields reaches 1cm, so that the soil in the paddy fields becomes moist; at the same time as the irrigation, add entomopathogenic nematodes to the water inlet for irrigation, and the application rate is 20 million / mu. The average air temperature within 3 days after application of entomopathogenic nematodes is not lower than 25°C;

[0047] 3. Before transplanting the current season rice (early rice in 2020), apply the entomopathogenic nematode for the second time after plowing the field. The application method and application amount are the same as step 2. The average temperature within 3 d...

Embodiment 2

[0051] From October 2019 to July 2020, experiments were carried out in 50 mu of rice fields in Oujiangcha Town, Heshan District, Yiyang City.

[0052] 1. When the first season rice (late rice in 2019) is harvested, the rice is harvested with low piles, and the height of the rice piles is 10cm;

[0053] 2. Spray entomopathogenic nematodes in the harvested paddy fields that have just had light rain, and the spraying rate is 30 million / mu. The average air temperature within 3 days after application of entomopathogenic nematodes is not lower than 25°C;

[0054] 3. Before transplanting the current season rice (early rice in 2020), apply the entomopathogenic nematode for the second time after plowing the field. The application method and application amount are the same as step 2. The average temperature within 3 days after applying the entomopathogenic nematode is not low at 25°C;

[0055] 4. After the rice is transplanted in the current season, if insect damage occurs at the seed...

Embodiment 3

[0058] From October 2019 to July 2020, experiments were carried out in 50 mu of rice fields in Longtan Town, Lukou District, Zhuzhou City.

[0059] 1. When the first season rice (late rice in 2019) is harvested, the rice is harvested with low piles, and the height of the rice piles is 10cm;

[0060] 2. Irrigate the harvested paddy field to make the water layer depth of the paddy field reach 1cm, so that the soil of the paddy field becomes moist; at the same time of irrigation, add entomopathogenic nematodes to the water inlet for irrigation, and the application rate is 25 million / mu. The average air temperature within 3 days after application of entomopathogenic nematodes is not lower than 25°C;

[0061] 3. Before transplanting the current season rice (early rice in 2020), apply the entomopathogenic nematode for the second time after plowing the field. The application method and application amount are the same as step 2. The average temperature within 3 days after applying t...

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Abstract

The invention provides a method for reducing a base number of pests in a rice field by using entomopathogenic nematodes, and belongs to the technical field of green planting of rice. The invention provides a method for low stump harvesting of first season rice and parasitic prevention and control of rice pests through entomopathogenic nematodes by using the biological characteristics that the entomopathogenic nematodes can parasitize larvae and pupae of main pests of rice and combining a rice cultivating and planting process. Before rice planting, the rice field is not shielded by rice plants,the entomopathogenic nematodes are applied to the rice field, the base number of pests in residual rice stumps in the rice field is greatly reduced, and during rice planting, the entomopathogenic nematodes are applied to the rice field along with irrigation water (or spraying), so that the purpose of preventing and controlling the larvae and pupae of the pests, such as chilo suppressalis, cnaphalocrocis medinalis and lissorhoptrus oryzophilus kuschel is achieved. The method provided by the invention is beneficial to promoting large-area application of a rice green prevention and control technology system, and is one of effective ways for realizing ''zero increase'' in usage amount of a pesticide.

Description

technical field [0001] The invention belongs to the technical field of rice green planting, and in particular relates to a method for reducing the base number of rice field pests by using entomopathogenic nematodes. Background technique [0002] Worldwide, the losses of agricultural diseases, insects and weeds avoided and restored by pesticides account for 1 / 3 of the grain output. However, the long-term use of pesticides has not only caused serious environmental pollution, but also severely damaged biodiversity. At the same time, as diseases, insects, and weeds become more and more resistant to pesticides, the control effect of chemical pesticides is also getting lower and lower. Therefore, the research and development of green prevention and control technologies for major rice pests (Chilorrhizae, rice leaf rollers, and rice water weevils, etc.) can greatly reduce the amount of pesticides used while ensuring that rice is not harmed by diseases and insect pests in the proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G13/00A01G22/22
CPCA01G13/00A01G22/22
Inventor 刘洋张玉烛吴晓峰
Owner HUNAN RICE RES INST
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