梨瘿蚊在桂林田间消长规律及防治技术研究

2007—2008年对梨瘿蚊在桂林田间消长规律及防治进行了观察研究。结果表明，梨瘿蚊越冬代羽化出土时间是在早春2月中旬～3月上旬；越冬代的羽化高峰（即危害高峰）在2月20日-3月10日；第一代发生高峰在4月10～25日，第二代发生高峰在5月10～25日，第三代发生高峰在6月10～20日。田间防治试验表明，在越冬代羽化出土之前，用40％辛硫磷乳油300倍液泼洒土壤对梨瘿蚊有良好预防效果。同时，在幼虫未老熟脱叶掉地之前，摘除第一批被害春梢并带出园外烧毁，防效更加显著。

Study on the field change rules and its prevention and control technica for Contaarinia pyrivora（Riley） in Guilin

Contaarinia pyrivora （Riley） in Guilin field change years.The results showed that Contaarinia pyrivora（Riley） live rules and prevention was observed in 2007 - 2008 through the winter time is provided and unearthed in early spring mid-February - early March. Winter generation of feather peak （i.e. harm peak） on February 20, March 10. The first generation of peak happened in April 10 to 25 ;The second generation occurred during the May 10 to 25 ;The third generation occurred on June 10 ~ 20 .Tests showed that the control,in the winter and before they unearthed , 40 % of Michael essien sulphur phosphorous 300 times throwing in the soil has good preventive effect to Contaarinia pyrivora （Riley）.At the same time, before the larva maturation and fall down on the ground,the control effect would be better if remove the first spring harmed leaves and burn them outside of the orchard.