The results show that the red pine woods is a weak ecosystem, which may be the cause of spreading plant diseases and pest insects.
指出目前的赤松林是一种脆弱的生态系统，这是病虫害蔓延的原因。
It is necessarily to monitor crop diseases and insect pests in integrated pest managerment.
农作物病虫害监测是有害生物综合防治必不可少的环节之一。
The system will greatly improve the prevention of cotton diseases and insect pest.
此系统的建立将对我国棉花病虫害防治具有现实性的意义。
The main factor that affects population's uniformity is invalid plant including inbred lines, barren stalk rate, diseases and pest insects plant in populations of different yield level.
无效株是影响群体整齐度的重要因素，主要包括：自交株、空秆、小穗株及病虫害株等。
Occurrence of major diseases, pest-insects and weeds in rice-crab field were surveyed.
对养蟹稻田主要病虫草害的发生规律进行调查。
The system collected more than 150 kinds of rice pest insects and diseases and offered many functions, such as data query, diagnosis and forecast.
本系统共收集了150多种水稻病虫害，集查询、诊断、预测和防治多种功能于一体。
The known diseases and insect pests of Cycadaceae in China and their control were summarized, and 4 species of disease and 45 species of insect pest damaging Cycadaceae plants in China were recorded.
对中国苏铁科植物已知病虫害及其防治研究进行综述，整理出已知病害4种，虫害45种。
The known diseases and insect pests of Cycadaceae in China and their control were summarized, and 4 species of disease and 45 species of insect pest damaging Cycadaceae plants in China were recorded.
对中国苏铁科植物已知病虫害及其防治研究进行综述，整理出已知病害4种，虫害45种。
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