5种杀菌剂防治山药炭疽病的效果

Preventing and Controlling Efficiency of 5 Fungicides on Yam Anthracnose

分别在山药炭疽病发生前、发生初期和中期施药,测定爱苗、施保功、世佳、炭息、代森锰锌5种杀菌剂对山药炭蛆病的防治效果。结果表明,30%爱苗是防治山药炭疽病的最好药剂,其5 000倍液在发病前、初期、中期施用的防效分别为98.72%、95.27%、90.61%,且持效期较长。50%施保功1 500倍液在山药发病前、初、中期喷施也有较好的防治效果,为84.32%～95.20%,但持效期较爱苗短。10%世佳1 500倍液和40%炭息500倍液在发病前、初期喷施有一定的防效,但在中期喷施防治效果较差,仅为78.27%和61.42%。70%代森锰锌500倍液作为保护性杀菌剂,在发病前使用对山药有一定的保护作用,不宜在发病期使用。

The preventing and controlling effects of five kinds of fungicides,Aimiao,Shibaogong,Shijia,Tanxi and Daisenmengxin were studied in the field before or in the early and middle stage of the yam anthracnose disease.The result showed that 30% Aimiao was the best fungicide to control yam anthracnose.Its control effect was 98.72%,95.27% and 90.61% when diluted 5000 times by water before,in the early and middle stage of the disease,and the lasting period was long.50% Shibaogong diluted 1500 times was also effective,with the efficacy of 84.32%-95.20% when used before,in the early and middle stage of the disease,but the lasting period was shorter.1500 times of 10% Shijia and 500 times of 40% Tanxi had effects when used before and in the early stage of yam anthracnose,but the effects were just 78.27% and 61.42% in the middle stage of the disease.As a protective agent,500 times of 70% Daisenmengxin showed certain protective function before disease happening,but it was not suitable for use in the intermediate stage of yam anthracnose developing.