蚬木曲脉木虱的生物学特性及室内药效试验

STUDIES ON THB BIOLOGICAL CHARACTERISTIC AND CONTROL OF SINUONEMOPSYLLA BURREDIODENDRI

蚬木曲脉木虱经鉴定为一新种。此害虫常以若虫群集于嫩芽、嫩叶上为害,在日均温度28.8℃时,卵期最短为5天,最长6天,平均5.24天。若虫期17天,脱皮4次;每雌产卵量212粒,产卵前期5～6天,产卵期8～14天,卵聚产或散产。其一生可交尾多次;完成一个世代约需30天,世代重迭,无明显越冬现象。虫口密度年消长与抽梢密切相关,春梢虫口密度达全年最高峰,与降雨量呈负相关,但不达显著。

Some of the biological characteristics of a new species, Sinuonemopsylla burrediodendri Li et Yang, were reported. The nymphae of the insect aggre- gate on and attack the tender buds and leaves of Burretiodendron hsienmu Chun et How. The egg-hatching takes 5 to 6 days with an average of 5.24 days at 28.8℃ of mean daily temperature. The nymph stage is 17 days with 4 moults. The preoviposition period is 5 to 6 days and the oviposition lasts 8 to 14 days. Female can mate several times throughout its life and lays eggs in together or separately. An entire generation needs about 30 days and generations overlap. No overwintering phenomenon was observed. The popu- lation density reaches the greatest when host plants are budding in the spring.