为掌握玉米病虫害发生种类和农药使用情况，制定玉米病虫害防治规范。采用定点调查方法，对陇西县玉米病虫害及农药使用情况进行了调查。调查发现，该县玉米主要病害有茎基腐病、锈病、大斑病和小斑病，虫害有玉米螟、蚜虫、红蜘蛛、蓟马、黏虫和地下害虫等。将农药使用情况录入全国农药信息管理系统进行分析，表明在玉米整个生育期，按其类型，除草剂用量最大，其次为杀虫剂和杀菌剂，生长调节剂用量最小；按毒性，低毒农药用量最大，其次为中毒农药，微毒农药用量最小；按种类，以化学农药为主、生物农药为辅；按农药成分，辛硫磷、莠去津用量较大。

In order to master the occurrence regularity of diseases and insect pests and the application of chemicals in maize for the development of prevention and control specifications of maize diseases and insect pests, fixed point investigation method was applied to investigate the maize diseases and insect pests as well as the application of agricultural chemicals at Longxi County. Results showed that the main diseases of maize were stem rot, rust, large leaf spot and small leaf spot. In addition, the main pests, including corn borer, aphid, red spider, thrip, armyworm and underground pests, occurred in maize. According to the analysis of chemicals application in the national agricultural chemicals information management system, the dosage of herbicides applied was the largest, followed by insecticides and fungicides, and the dosage of growth regulators was the smallest during the whole growth period of maize. According to the toxicity, the dosage of low toxic pesticides was the largest, followed by toxic pesticides, and the dosage of micro toxic pesticides was the smallest. Chemical pesticides were dominant and biological pesticides were the auxiliaries. According to the composition, the amount of phoxim and atrazine applied was the largest.

S435.13