Novel method for preventing and controlling brown planthopper

A brown planthopper, a new method of technology, applied in the directions of botanical equipment and methods, chemicals for biological control, insecticides, etc., can solve problems such as decreased control effect

Inactive Publication Date: 2015-07-01
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large and frequent use of chemical insecticides, the brown planthopper has developed resistance to them, resulting in a significant decline in the control effect

Method used

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  • Novel method for preventing and controlling brown planthopper
  • Novel method for preventing and controlling brown planthopper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1: (preparation of Nadiwan water-dispersible granule)

[0011] Nadiba water-dispersible granules are produced by Bayer, and Nadiba water-dispersible granules are dissolved in tap water to make a final concentration of 0.3g / L Nadiba preparations.

Embodiment 2

[0012] Embodiment 2: (Application of Nadivin in the control of brown planthopper)

[0013] Follow these steps:

[0014] (1) For TN1 rice plants at the tillering and jointing stage, remove part of the roots and base leaf sheaths, wash them, and dry them naturally;

[0015] (2) Use clean water as a control, 0.04g / L imidacloprid liquid treatment as a positive control, spraying final concentration of 0.3g / L Nadiba, requires uniform distribution of liquid droplets, high coverage, appropriate amount of liquid, It is advisable to wet the surface of the target object without loss, and let it dry naturally;

[0016] (3) Put the main stems of rice seedlings treated in step (2) into large test tubes filled with 20ml of rice culture solution in advance, one rice seedling in each test tube, and put them into each test tube at the same developmental stage after 12 hours. One first-instar nymph of N. lugens planthopper was sealed with two layers of gauze, and each treatment was repeated 15...

Embodiment 3

[0019] Embodiment 3: (the control effect of Nadimen on nymphs and adults of brown planthopper)

[0020] Follow these steps:

[0021] (1) For TN1 rice plants at the tillering and jointing stage, remove part of the roots and base leaf sheaths, wash them, and dry them naturally;

[0022] (2) With clear water as the control, the final concentration of spraying is 0.3g / L Nadiben. It is required that the liquid droplets are evenly distributed, the coverage rate is high, and the amount of liquid is appropriate. It is advisable to wet the surface of the target without loss, naturally dry;

[0023] (3) Put the main stems of rice seedlings treated in step (2) into a large test tube filled with 20ml of rice culture solution in advance, and insert 3 rice seedlings into each tube, and insert the 3rd instar brown planthopper nymphs (or newly emerged brachypterous female adults) ) 30 heads, with the treatment of rice seedlings after spraying clear water as a negative control, and the treat...

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Abstract

The invention relates to the technical field of biological prevention and control, in particular to a novel method for preventing and controlling brown planthopper. Trifloxystrobin-tebuconazole water dispersible granule (the mass percentage of effective components is 75 percent, wherein the mass percentage of trifloxystrobin is 25 percent, and the mass percentage of tebuconazole is 50 percent) is used for preventing and controlling brown planthopper filial generations. The most remarkable characteristic of the novel method is that yeast-like symbiotes are prevented or inhibited from entering ovarian tissues from the hemolymph of brown planthopper female adults through a trifloxystrobin-tebuconazole sterilizing agent, so that the reproductive systems of the brown planthopper is influenced, the egg laying amount is reduced, and the hatching rate of the laid eggs is remarkably lowered due to the lack of symbiotic bacteria. Thus, the generation of brown planthopper filial generations is effectively controlled.

Description

technical field [0001] The invention relates to the technical field of biological control, in particular to a new method for controlling brown planthopper. Background technique [0002] The brown planthopper is an important rice pest in Asia, and it is also a major pest in the Yangtze River Basin, South China and Southwest China, causing great harm to rice production in my country. The existing control methods mainly control BPH by popularizing insect-resistant rice varieties or by spraying insecticides. Insect-resistant rice varieties have a certain control effect on the population of brown planthoppers in the short term, but brown planthoppers have strong adaptability to insect-resistant rice varieties. Generally, three generations of breeding can adapt to the variety resistance, so insecticides are needed for control brown planthopper. However, due to the large and frequent use of chemical insecticides, the brown planthopper has developed resistance to them, resulting i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N43/653A01P3/00A01P7/04A01G13/00A01N37/50
Inventor 俞晓平许益鹏申屠旭萍
Owner CHINA JILIANG UNIV
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