中华稻蝗发生规律与防治技术研究

研究了浙江地区中华稻蝗生态习性、发生消长规律与影响因子，并以此为依据，对药剂防治等多种措施进行了研究。结果表明：在浙江中华稻蝗年发生一代，以卵在土壤中越冬，主要为害早稻和单播单季晚稻，以水稻分蘖期至破口抽穗期受害重，成虫单体日食叶面积平均为6.26±1.08cm2；初步探明了中华稻蝗产卵习性和生殖力，雌成虫每头平均产卵3.5±1.2块，产卵量35.1±11.86粒；生境、药治、天敌、气象等因子综合影响其种群消长，其中农业生态环境的改变是中华稻蝗上升的主要原因。大田防治以2~3龄蝗蝻为适期，锐劲特、三唑磷防治效果在90%以上；提出了“挑治为主、普治为辅、巧治低龄”的治蝗新策略和综合防治技术，在浙江水稻主产区的推广应用，有效地控制了中华稻蝗发生为害，取得显著的经济社会和生态效益

Study on Occurance and Control of Chinese Rice Locust

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.