对养蟹稻田主要病虫草害的发生规律进行调查。
Occurrence of major diseases, pest-insects and weeds in rice-crab field were surveyed.
探讨了在养蟹稻田减量使用农药防治病虫草害的可行性。
The feasibility of using mini-dose pesticides to control insect pests in paddy field where crabs were cultured was studied.
棉花病虫草害是制约棉花产量和质量提高的重要原因之一。
The diseases and insect pests and weeds of cotton have seriously restricted to increase the yield and quality of cotton.
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