摘要
1985～1988年在贵州省各柑桔产区调查矢尖蚧的天敌种类,经鉴定,捕食性天敌12种,寄生性天敌5种,病原微生物2种。矢尖蚧蚜小蜂为优势种天敌,不同柑桔园的天敌优势种有差异。南街柑桔园以矢尖蚧蚜小蜂的种群数量为最高,10月高峰期,每叶可达10头;二双斑唇瓢虫的虫口较多,8月高峰期每枝有3.4头。小山的蚜小蜂每叶为2.5头。两处桔园还有湖北红点唇瓢虫及日本方头甲,每枝均在0.5头以下。
Results of field investigations conducted in main citrus growir.g areas of Gaizhou Province during 1985-198S indicated rhat U. yananensis was attacked by 12 species of predators, 5 species of parasitoids, and 2 fungal pathogens. The dominating natural enemy species differed in different citrus groves. For example, in Nanjie Citrus Orchard, Aphytis yanonensis [Hym.:Aphelinidae] had the highest population density of 10 per leaf at its peak in October. Chilocorus bijugus [Col.:Coccinellidae] had 3.4/leaf in August. In Xiaoshan Citrus Orchard, the population density of A. yanonensis in October was 2.5/leaf. C. hupehamis and Cybocephalus nipponicifs [Col.:'Nitidulidae] had low numbers of less than 0.5 per branch throughout the year.
关键词
柑桔
矢尖蚧
天敌
种群动态
Unaspis yanonensis Aphytis yanonensis Chilocorus bijugus Chilocorus hupehanus Cybccephalus nipponicus citrus pest
