樟脊网蝽生物学特性观察

Observations on bionomics of Stephanitis macaona Drake

樟脊网蝽是香樟的重要害虫，在上海1年发生4代。4月下旬越冬卵始孵，9月下旬开始出现越冬卵。成虫末见期在11月中旬。经室内饲养，樟脊网蝽第三代各龄若虫历期为：一龄61．45±7．8h，二龄48．00±7．6h，三龄43．43±7．6h，四龄51．00±8．0h，五龄70．50±7．5h，整个若虫期历期为281．92±14．8h。第三代野外雌雄比为1：4．07。第三代每雌产2～96粒。日最高产卵量为34粒／头，孤雌可产卵。10％灭百可2000倍稀释液和50％杀螟松2000倍稀释液喷雾防治效果可达93％以上。

Stephanitis macaona Drake is a serious insect pest on Cinnamomum comphora (L.) Presl.It has 4 generations per year in Shanghai. This insect passes the winter as eggs in the leaves of thehost, the eggs hatch at the end of April. There are 5 nymphal instars in each generation. In thirdgeneration, development of the 1st-5th instars lasts 61．47±17．8h, 48．00±7．6h, 43．43±7．6h, 51．00±8．0h, 70．50±7．5h respectively, the total nymphal stage lasting 281．92±14．8h. The female of the third generation lays 2 to 96 eggs during its life cycle with daily maximum of 34 eggs. The sex ratio(female: male) of the third generation is 1:4．07.