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冬季在广东南繁大豆,主要有两个内容,一是繁殖优良品系以便进行产量鉴定,二是增代,加速选育过程。南繁过程中,大豆食心虫及潜根蝇危害极大,一般由食心虫引起的虫食率都在20%以上,多者可达70%以上,甚至达到百分之百。即使防治也都在10%以上,其结果是少收甚至无收。如何降低其危害程度呢?1984年冬我们在广东省惠来县南繁大豆,采取了有效的防治措施,取得了显著效果,当年的虫蚀粒率仅在0.5%。我们的做法:
Winter in Guangdong Fanfan soybean, there are two main contents, one good breeding line in order to carry out the identification of the output, the second is to increase the generation, to speed up the breeding process. South Fanfan process, soybean borer and potential root-flies great harm, generally caused by the worm-eating insects are more than 20% of the rate, more than 70% of up to even reach 100%. Even if the prevention and treatment are also above 10%, the result is less or no income. How to reduce the extent of its harm? In the winter of 1984, we Huolei County, Guangdong Province, Fanfan soybeans, to take effective control measures, and achieved remarkable results, the year worm eradication rate was only 0.5%. Our approach: