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广州市常年水稻播种面积320万亩左右,常年病虫发生面积600～800万亩次,大发生年份达1500万亩以上,主要有稻飞虱、稻纵卷叶螟、三化螟、纹枯病、稻瘟病;某些年份细菌性条斑病、白叶枯病、粘虫、细菌性基腐病等亦有不同程度的发生,成为获得水稻高产稳产的主要障碍。为了尽量减少农药用量,有效控制病虫危害,我市于1987年起研究试行病虫害总体测报技术,指导科学用药,提高病虫防治效益,取得了明显的成效。
The annual perennial rice sown area in Guangzhou is about 3.2 million mu, and perennial pests and diseases occur in an area of 600-800 million mu. The annual occurrence of pests and diseases is over 15 million mu. The main pests include planthoppers, rice leafroller, rice stem borer, In some years, bacterial leaf streak, bacterial leaf blight, armyworm, bacterial base rot also have different degrees of occurrence, and become the major obstacle to high and stable yield of rice. In order to minimize the amount of pesticides and effectively control pests and diseases, the municipality started to study and test the overall measurement and reporting technologies for pests and diseases in 1987, guiding scientific medication and improving the pest and disease control benefits, and achieved remarkable results.