柿伪安瘿蚊生物学特性及其防治研究

柿伪安瘿蚊主要危害浙江省兰溪市的本地品种大红柿。其幼虫在当年生枝条皮上取食并形成虫瘿，严重影响柿子产量。柿伪安瘿蚊在兰溪１ａ发生１代，以１龄幼虫在柿树受害枝条上的虫瘿内越冬。下沉年份５月上旬成虫羽化降雨量的大小可以直接影响发生量，多雨湿润的年份发生量大，干旱少雨的年份尤其是春季干旱可以明显降低虫口数量。实生苗上虫口数量很少，野柿实生苗为砧木，大红柿为接穗的嫁接苗上虫口数量最多，春梢上虫口数量较夏梢

Study on Biological Aspects and Control Strategies of Pseudasphondylia diospyros(Diptera:Cecidomiidae)

Pseudasphondylia diospyros mainly damages the local variety of Diospyros kaki in Lanxi City of Zhejiang Province,the larvae feed on under barks of new branches,form galls,and heavily reduce the yield of fruits.This cecidomiid has only one generation in Lanxi,overwinter by first instar larvae in shoots. The adults hatch normally in the early of May,the adult population density can be affected by rainfall,the high density occurred in wet year,low density occurrs in dry year especially dry Spring season. The population density is higher in grafting seedling when local variety Dahongshi as cion than any other varieties,and it is higher in Spring shoots than in Summer and Autumn shoots.It is found that there are three parasitoids on the cecidomiids,i.e. Eurytoma nigrita,Eupelmus urozonus and Cerambycobius sp..The control strategy is to spray insecticides when the most cecidomiid adults emerge,combined with quarantine,culture control measures, concordant of biological and chemical control measures. The relations between occurrence and environment effects were also discussed.