Direct-sown rice field weed control method for delaying or preventing barnyard grass from developing resistance
A direct-seeding paddy field, pesticide resistance technology, applied in botany equipment and methods, chemicals for biological control, biocides, etc., can solve the problems of rice and subsequent crop phytotoxicity, affecting crop yield and quality, etc., to achieve The design is reasonable and novel, the control effect is improved, and the effect of increasing rice yield
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[0022] The present invention is further illustrated below by way of examples.
[0023] 1. Demonstration in Yuanjiang County, Hunan Province
[0024] The demonstration site is a hilly double-cropping rice area. The paddy field soil is sandy loam, pH 7.2, organic matter content 2.1%, and soil fertility is uniform. The rice varieties planted include Xiangzaoxian 6, Xiangzaoxian 45, Xiangzaoxian 143, Xiangwanxian 11, Huanghuazhan, Hualiangyou 105, etc. Live cultivation is adopted.
[0025] The occurrence of weeds in the paddy field is relatively large. The control area without weeding was investigated 60 days after rice sowing, and it was found that the main weeds were barnyardgrass 189-242 plants / m 2 , Qianjinzi 12-18 plants / m 2 , 47-60 plants / m 2 , 54-71 plants / m 2 , Heterogeneous sedge 43-75 plants / m 2 . Reduce rice yield by 47.8-63.4%.
[0026]In the first year, use amide-type pretilachlor (containing the safener chlorpyramid, the weight ratio of pretilachlor to clopy...
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