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Transplantation paddy field weed control method for retarding or preventing cockspur grass from producing drug resistance

A drug resistance and paddy field technology, applied in botany equipment and methods, chemicals for biological control, biocides, etc., can solve problems such as rice and subsequent crop phytotoxicity, affect crop yield and quality, and achieve barnyardgrass Improved grass control effect, improved weed control effect, reasonable and novel design effect

Inactive Publication Date: 2013-01-02
CHINA NAT RICE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If you continue to use quinclorac to prevent and control resistant biotype barnyardgrass, its control effect is less than 60%. If you increase the dosage of quinclorac, it will cause serious phytotoxicity to rice and subsequent crops, affecting crop yield and quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The present invention is further illustrated below by way of examples.

[0022] 1. Demonstration in Fangzheng County, Heilongjiang Province

[0023] The paddy field soil in this demonstration area is white pulp meadow soil with an organic matter content of 3.2%, pH6.2, and medium soil fertility. The rice variety planted is Dongnong 425, and the seedlings are transplanted around May 20, and the seedlings are 40-45 days old. Use manual or mechanical transplanting cultivation methods.

[0024] The occurrence of weeds in the paddy field is relatively large. 50-60 days after rice sowing, the control area without weeding was investigated, and it was found that the main weeds were barnyardgrass 563-927 plants / m 2 , Arrowhead 527-830 plants / m 2 , Triangle grass 14-28 plants / m 2 , Langbacao 277-351 plants / m 2 , Alisma 245-320 plants / m 2 . Reduce rice yield by 41.5-53.9%.

[0025] In the first year, use organophosphate glyphosate 41% water solution 2767.5ga.i. / hm 7 days b...

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PUM

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Abstract

The invention discloses a transplantation paddy field weed control method for retarding or preventing cockspur grass from producing drug resistance, belonging to the technical field of plant protection. The invention adopts different types of herbicides in the same year as well as adopts different types of herbicides in different years and utilizes the characteristic that different herbicides have different acting loca to control weeds in the paddy field. The transplantation paddy field weed control method has reasonable and novel design, single-year weed control effect by utilizing transplantation paddy field weed control method of the invention can be above 95%, and the weed control effect of one cycle period or multiple cycle periods can also be above 90%. Compared with the prior art, the invention can improve the cockspur grass control effect by 30-40%, improve the control effect of other weeds by above 10% and increase paddy yield by 5-15%.

Description

technical field [0001] The invention belongs to the technical field of plant protection, and in particular relates to a method for preventing and controlling weeds in transplanted paddy fields for slowing down or avoiding barnyardgrass resistance. Background technique [0002] Barnyardgrass is a global malignant weed in rice fields, which has the greatest impact on rice yield, and chemical herbicides can be used to control this weed. However, chemical herbicides have been used in my country for more than 40 years, and chemical herbicides have been applied on a large scale for more than 20 years. In recent years, the biotypes of resistant weeds have increased significantly, resulting in a significant increase in rice yield loss. The emergence of weed resistant biotypes is caused by the long-term continuous use of a single type of herbicide and the same site of action. For example, the resistance ratio IC of barnyardgrass to quinclorac in Anxiang County, Hunan 50 (Resistance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N57/20A01N43/824A01N43/78A01N37/22A01N43/90A01N43/42A01N39/04A01N37/26A01N43/88A01N47/36A01P13/00
Inventor 陆永良余柳青
Owner CHINA NAT RICE RES INST