甘肃景泰杏芽瘿发生规律研究初报

在甘肃景泰危害杏树的杏芽瘿是梅下毛瘿螨,1年发生10代以上,世代重叠。在18℃左右,若螨期5～6d,成螨期3～4d,卵期5～6d,完成一个世代需13～16d。通过室外群体发育进程的观察和室内单体饲养,结果基本一致。在调查的6个杏树品种中,＂安宁18＂受害最重,其次为曹杏、张公园和兰州大接杏,受害最轻的为金太阳杏、凯特杏。一般多年生老杏园、管理粗放的杏园受害较重,幼龄杏园、管理精细的杏园受害较轻。

A Preliminary Study on Occurrence Regularity of Apricot Bud Gall in Jingtai Regions of Gansu

Acalitus phloeocoptes（Nalepa） become harmful bud gall of apricot in Jingtai regions of Gansu.The yearly generation number of this insect pest was over 10 generations,and was alternate of the generations.At 18 ℃ more or less,nymph was 5～6 days,imago was 3～4 days,stage of egg was 5～6 days,A complete generation needed 13～16 days.Both indoor and outdoor experiments were conducted to clarify the development progress of mites.In indoor experiment the single mite was raised.Resistance of the trees was different,six varieties were investigated in which ＂An-ning18＂ was most injured,then the Cao apricot and Zhang-gong-yuan and Dajie apricot of Lanzhou.But golden sun apricot and kate＇s apricot were lightest injured.The general perennial old apricot and the apricot with extensive management suffer injury seriously;The young age apricot and the apricot with fine management suffer injury lightly.