摘要
莲缢管蚜是危害泽泻生长的重要害虫之一。药效试验结果表明,2.5%菜喜SC、1.5%普乐CS、25%阿克泰WG、3%莫比朗EC和20%康福多EC对莲缢管蚜具有良好的防效,适宜在泽泻生产上使用。莲缢管蚜虫口数量与块茎产量损失率之间相关式:在生长前期,Y=-0.331 8+0.397 8X(r=0.993**);在生长中期,Y=0.041 2+0.247 4X(r=0.950*);在生长后期,Y=-0.003 6+0.113 9X(r=0.922*)。根据经济阈值的计算公式,结合莲缢管蚜虫口数量与块茎产量损失率之间的相关式,制定出了不同时期选用不同药剂的防治指标。
Rhopalosiphum nymphaeae L is one of the important pests in Alisma orientale （Sam.） Juzep. The results of field trial for the pesticide efficacy showed that 2.5% Spinosad SC , 1.5% Gamma - Cyhalothrin CS, 25% Actara WG ,3% Mospilan EC ,20% Confidor EC had good effects on Rhopalosiphum nymphaeae L, useful in production of Alisma orientale （Sam.） Juzep. In addition, the relationship between the amount of Rhopalosiphum nymphaeae L and the yield loss rate of the tuber of Alisma orientale （ Sam. ） Juzep. was investigated, their relations fitted to the formula ： Y = - 0. 331 8 ＋ 0. 397 8X（ r = 0. 993 ^＊＊ ）, for earlier stage ; Y=0.0412＋0.2474X（r=0.950^＊）,forlater period; Y= -0.003 6 ＋0. 113 9X（r= 0.922^＊）,at the later stage. According to the formula, the control indexes of differenf kinds of pesticides at different stages were finally determined.
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2005年第6期847-851,共5页
Acta Agriculturae Universitatis Jiangxiensis
基金
福建省科技厅重大课题资助项目(2001Z145)
关键词
泽泻
莲缢管蚜
药效试验
经济阈值
防治指标
Alisma orientale （ Sam. ） Juzep
Rhopalosiphum nymphaeae L.
field trial of pesticide efficacy
economic injury level
control index
