以蝗虫微孢子虫治理稻蝗的技术

Biological Control of Oxya chinensis by Using Nosema locustae

研究了以蝗虫微孢子虫防治为主 ,协调其它措施持续治理稻蝗的方法。以蝗虫微孢子虫 1 5× 1 0 10 孢子 /hm2 感染蝗虫 ,3 0d后 ,虫口减退率达 6 5 4% ;仿生农药卡死克与微孢子虫条带式协调喷施 ,以间隔喷施面积 3∶1为最好 ,施放后第 7d ,虫口减退率 73 9% ;45d后 ,防治效果仍达 6 1 6 %。

A new tactics for management of rice grasshoppers, mainly with Nosema locustae, integrated with insect growth regulator and chemical pesticide, was developed in Beijing. The results of field experiments showed that when spray of N.locustae at dosage of 1.5×10 10 spore/hm 2 was used, the population of rice grasshopper, Oxya chinensis reduced 65.4% in 30 d. When 5% Cascade was integrated with N.locustae as stripe sprays (every 3 rows∶1 row), the locust population reduced 73 9% in 7 d and was still effective (61.6%) 45 d after application.