关键词: 团聚体, 团聚体, 水稳性, 放牧林草地, 黄土高原, 丘陵沟壑区

Abstract: The results of the experiments showed that Chinese Rice Locust (Oxya chinensis) in Zhejiang on biological characteristics, occurrances and environmental factors, and by these chemical contol and other control measures were also studied. The locust was found one generation a year, over winter by eggmass in soil. Mainly damage early rice and single sowing single season latter rice, heavy damage occurred in tillering and heading stages. The adults feeding leaf area in one day was measured as 6.26±1.08cm2, primary results showed that egg laying habits and reproductivity, each female adults can lay 3.5±1.2 eggmass, in which contained 35.1±11.86 eggs. The habitats, chemicals, natural enemies and weather conditions affected integratedly the locust population dynamics, in which the changing of agricultural ecological environment was responsible for the locust damage rised. The best time for spray in field control was the locust nymphes in the 2nd and 3rd instars, 90% effects can be achieved by spraying fipronil and triazophos, new strategesand control technology of “mainly selection control, aided whole spray, smartly control low instar”, which were extended in Zhejiang rice culture area, the locusts were effectively controlled and the significant economical, social and ecological effeciency were acquaired.