应用1.2%苦参碱·烟碱乳油防治黄栌胫跳甲幼虫试验

Control of Ophrida xanthospilota with nicotine·matrine 1.2% emulsible concentrate

应用不同浓度1．2％苦参碱·烟碱乳油喷雾防治黄栌胫跳甲Ophridaxanthospilota幼虫，结果表明：1．2％苦参碱·烟碱乳油500，1000倍液喷药2d后幼虫校正死亡率均为100％；1500倍液的防治效果随着时间的增加而增加，喷药后8d幼虫校正死亡率最高，达到87．4％；2000倍液对黄栌胫跳甲1—2龄幼虫的校正死亡率在喷药后6d达到最高，只有10．9％；生产上宜采用1500倍液进行防治．

Nicotine-matrine 1.2% EC at different concentration was sprayed against Ophrida xanthospilota（Baly）. The result showed the mortality of larvae was 100% 2 days after the spray of 500 and 1000 time dilution. In the treatment of 1500 time dilution,the control effect increased with the time and the mortality reached 87.4% 8 days after the spray. The corrected mortality of the 1st and 2nd instar larvae was 10.9% 6 days after the spray of 2000 time dilution. 1500 time dilution is suggested for the control in the field.