摘要
柑桔木虱在浙南平阳一年发生6～7代,以成虫在寄主叶背越冬,翌年3月中、下旬产卵于芽缝间,4月上、中旬出现若虫;第一代成虫始见于5月上旬.世代重叠,7～8月柑桔秋稍期为成虫发生高峰期.卵期2～11天;若虫5龄,若虫期11～36天;世代历或共20～67天.成虫寿命13～246天,产卵前期6～30天.产卵期1～72天,一般连续一个月左右;每雌产卵量3～762粒,每代平均172～277粒.性比为1.06:1.
The citrus psylla, Diaphorina citri Kuwayama is not only the vector insect transmitting the yellow shoot disease of citrus but also an important pest infesting the tender shoots on Rutaceae. It has occurred in 15 countyes in the southern part of Zhejiang Province recently. There are 6-7 generations a year in Pingyang, Zhejiang. The adults overwinter on the back of leaves of citrus. Eggs are laid in the bud scales in mid or late March next year. Nymphs appear in early or mid April. First generation adults appear in early May. There are a number of overlapping generations, the adult population reaching a climax during the autumn shoot stage of citrus between July and August. The period of egg stage lasts 3-11 days. Development through the five nymphal instars is completed in 11-36 days. The length of the life cycle from egg to adult lasts 20-67 days. The period of preoviposition is 6-30 days. The sexual ratio of female to male is 1.06 : 1. An individual adult female has a life span of 13-246 days and may produce 172-277.3 eggs on the average in about one month.
