摘要
为掌握西宁市白蜡绵粉蚧的发生规律,筛选有效防治药剂,对白蜡绵粉蚧进行了生物学特性观察和药效试验,结果表明,白蜡绵粉蚧在西宁市1年发生1代,2个龄期,以2龄若虫在树皮裂缝、翘皮下、芽鳞间、树杈、侧枝背阴面结茧越冬.用40%氧化乐果500～1000倍液和2.5%天王星500～2000倍液防治白蜡绵粉蚧,防效可达93%以上.
Phenacoccus fraxinus Tang. occurs just one generation and have two instars in a year in Xining City. It's over winter by two ages cocoonnymphs under the raise bark, or within crevicebark, or inside scale and bud, and in the shady place of crotches and branches of the tree (Fraxinus chinensis Roxb.)had controlled by spraying with some insecticides Phenacoccus fraxinus is controlled, the result shows that 40% omethoate is diluted from 500 to 1 000 times, and or 2.5% Tianwangxing is diluted from 500 to 2 000 times which could control Phenacoccus fraxinus, whose effect of control may reach a rate of over 93%.
出处
《湖南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2003年第1期45-46,共2页
Journal of Hunan Agricultural University(Natural Sciences)
