摘要
乌副盔蚧Parasaissetia nigra(Nietner)是柑桔及许多园林植物的一种重要害虫,在广州一年发生8～9代,各代历期变化为28～66天。雌成虫产卵量为64～208粒,卵的孵化率高达95～100%。第1龄爬行若虫的出壳高峰在上午10时左右。该虫的种群数量秋季明显上升。调查得到寄生性和捕食性天敌共9种,5种寄生蜂中,以胶蚧红眼啮小蜂Tetrastichus purpureus和日本软蚧蚜小蜂Coccophagus japonicus两种为最主要。杀虫剂试验表明,用2.5%溴氰菊酯1:2000倍液喷雾或以40%氧化乐果1:6倍液涂干可防治此虫。
(Dcpartmcnt of forestry.South China Agricltural Univrsity)
Black coffee scale (Parasaissetia nigra (Nietner) is an important pest of citrus as well as ornamental shrubs and trees. It appeared 8 to 9 generations a year in Guangzhou, Guangdong Province. Duration of each generation varied from 28 to 66 days. Generally, a female adult lays 64-206 eggs. The hatchability of eggs was 95-100%. The peak occurrence of wandering time of the crawlers was at 10 a. m. The population rose in fall. A field survey showed that it has 10 species of natural enemies including parasite and predators. Among 6 hymenopterous parasites Tetrastichus purpureus and Coccophagus japonicus are the most important two. Insecticidal tests showed that the pest may be controlled by spraying with 2.5% Decamethrin in 1:20000 dilution or by painting the trunk with 40% Omethoate in 1∶6 dilution.
出处
《昆虫天敌》
CSCD
1991年第3期101-106,共6页
Natural Enemies of Insects
关键词
乌副盔蚧
生物学
天敌
防治
Parasaissetia nigra (NiCtner)
bionomics
natural enemy
control
