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樟个木虱Triozacamphorae是近年来上海地区香樟上发生的一种新害虫。作者对其形态和生物学特性进行了研究。樟个木虱在上海以 1年发生 2代为主 ,偶发 3代。樟个木虱以低龄若虫在叶片上越冬 ,3月下旬至 4月上旬越冬代羽化 ;第 1代开始于 3月下旬 ,羽化高峰在 6月份 ;第 2代开始于 5月下旬 ,并主要以该代若虫越冬 ;第 3代若虫偶发 ,开始于 7月上旬 ,以若虫越冬。樟个木虱第 1代若虫的平均发育历期为 5 0 72d,1～ 5龄若虫的历期分别为 :1 8 .3 1± 2 .2 1d ,1 4. 90± 9. 92d,6 .1 1± 2 . 2 0d,5 .80±3 . 61d ,5 60± 1 5 1d。成虫的寿命为 3～ 1 1d ,平均寿命为 6 41d。樟个木虱的产卵量为 3 9. 1粒 雌虫。2 4℃下 ,卵历期 5～ 7d不等 ,平均为 5. 3 4± 0 . 5 7d ,卵平均孵化率为 83 . 7%。樟个木虱低龄若虫中 3龄若虫最耐高温 ,其次为 2龄若虫 ,1龄若虫最不耐高温。
Triozacamphorae is a new pest occurring on camphora in Shanghai in recent years. The authors studied their morphological and biological properties. Zhangzhipi louse occurred in Shanghai in 1 year, 2 generations, occasionally 3 generations. Larix nymphs in the winter nymphs overwintering on the leaves, late March to early April overwintering on behalf of the emergence of the first generation began in late March, the peak emergence in June; the second generation began in late May and mainly to The generation of nymphs overwintering; 3rd generation nymph sporadically, beginning in early July to nymphs overwintering. The average developmental duration of the first generation nymphs of Campylos locusta was 5072 d, and the durations of nymphs of 1 ~ 5 instar nymphs were 18.131 ± 2.21d, 14.04 ± 9.92d, 6 .1 1 ± 2. 20d, 5.80 ± 3. 61d, 5 60 ± 1 5 1d. Adult life expectancy of 3 ~ 1 1d, the average life expectancy of 6 41d. Zhang Shi psyllid fecundity was 39.1 females. 2 4 ℃, the egg duration of 5 ~ 7d range, an average of 5. 34 ± 0. 5 7d, the average egg hatching rate of 83.7%. Larix nymph Zhangzhe nymphs in the third instar nymphs the most resistant to high temperature, followed by 2 instar nymphs, 1 instar nymphs most resistant to high temperature.