西宁地区蜡绵粉蚧寄生蜂绵粉蚧长索跳小蜂的初步研究

Preliminary studies of Anagyrus schoenherri in xining area

2010年至2012年,对西宁地区白蜡树主要害虫蜡绵粉蚧Phenacoccus fraxinus Tang寄生蜂进行了初步研究,结果显示:最主要的寄生蜂优势种为绵粉蚧长索跳小蜂Anagyrus schoenherri(Westwood),寄生率最高达86.55%,羽化高峰期在6月30日左右,雌雄性比为♀:♂=2.23∶1(69∶31);单个寄主寄生数量最低1头,最高11头,平均3.0头。成峰寿命为2-3 d,补充营养后可达到3-15 d。蛹和成虫出现的高峰期分别为为5月29日和6月30日。与寄主若虫盛发期(6月底7月初)完全吻合。

According to the research on scale insects living on Fraxinus chinensis Roxb. from March 2010 to November 2012, the results show that： The dominant population was Anagyrus schoenherri （Westwood） , Parasitic rate up to 86.55% elusion summit period around June 30, ♀ ： ♂ = 2.23： 1 （69： 31） ; The parasitic quantity 1 - 11 of each host, average was 3.0. The adult life for 2 -3days, It＇s life for 3 - 15days after compensatory nutrition. The peak period of pupa and adult respectively for May 29 and 30 June. It＇s in turn with host larva （at the end of June early July）.