褐背小螢葉甲的生物學特性研究

Study on biological characteristics of Galerucella grisescens (Joannis)

摘要: 褐背小螢葉甲是煙田蓼科雜草的重要天敵, 對蓼科雜草具有良好的自然控制作用,。本文研究了該天敵的生物學特性, 結果表明, 褐背小螢葉甲有卵,、幼蟲、蛹,、成蟲4 個蟲態(tài),。室內強迫取食試驗表明, 褐背小螢葉甲屬于寡食性昆蟲, 只取食蓼科的酸模屬和蓼屬植物, 而對田間的其他農作物和經(jīng)濟作物安全。在三明地區(qū), 1 年發(fā)生4 代, 在田間全年有兩個高峰, 分別在5 月上旬和7 月下旬, 有世代重疊現(xiàn)象,。

Abstract: Galerucella grisescens is an important natural enemy which could significantly control Polygonaceae weeds in tobacco fields. The biological characteristics study showed G. grisescens was holometabolic insect. Compelled feeding to 56 farm crops and economic crops in 14 families showed that G.grisescens was an oligophagous insect, only feeding on Rumex and Polygonum weeds. It occurred four generations in the fields in Sanming, Fujian Province and had two peak annually. The peak appeared in the first ten days of May and the last ten days of July respectively. It had generations overlapping in the fields.