新疆柽柳幽柽木虱的生物学特性

Biology and Behavior of Eustigmata tamaricina (Loginova) on Tamarix in Xinjiang

在新疆的柽柳属植物上发现3种木虱,对其中的柽柳幽柽木虱进行了研究。该种木虱在新疆阜康地区1年发生1代,以4龄若虫在柽柳多年生枝条上越冬。越冬若虫翌年4月中旬开始取食,并使枝条顶端形成虫瘿,若虫在虫瘿内发育到5龄,至6月开始羽化,成虫平均寿命7 3d。雌成虫将卵产在花苞内,若虫在花苞内取食形成虫瘿,4龄若虫10月中旬爬出虫瘿转移到多年生枝条上越冬。发现若虫寄生蜂1种。

We found three species of psyllids (Homoptera: Psyllidae, Aphalaridae) on Tamarix spp. (Tamariceae) in Xingjiang. The biology and behavior of Eustigmata tamaricina (Loginova), originally Crastina tamaricina, were observed both in the field and laboratory. One generation occurred a year in Fukang, 80km north to Urumqi. Nymph had five instars and overwintered at fourth instar on the branch of Tamarix. Overwintered nymphs started to feed on shoot tips in midApril and caused shoottip galls wherein they lived to fifth instar. Adults emerged in early June. The longevity of adult is 7.3 d on average. Eggs were laid in the calyx and the nymphs caused flowergalls by feeding into ovaries. Nymphs passed through four instars inside the flowergalls in midOctober and moved out of flowergalls to vivacious branch of Tamarix where they passed the winter. A parasitoid (Hymenoptera: Encyrtidae) was reared from the nymph. 