抑霉唑对马铃薯干腐病的防效

Control Efficacy of Imazalil on Potato Dry Rot

马铃薯干腐病(Fusarium spp.)是国内外重要的贮藏期马铃薯病害,近年来内蒙古发生严重,一般可造成损失20%~30%,但目前仍然没有防治马铃薯干腐病的有效方法。2014~2015年通过薯块药剂喷雾进行了杀菌剂10%抑霉唑可溶性液剂、75%抑霉唑硫酸盐可溶粒剂、80%克菌丹水分散粒剂和70%甲基托布津可湿性粉剂防治马铃薯干腐病试验。结果表明,供试药剂10%抑霉唑可溶性液剂100 m L/t薯块、10%/抑霉唑可溶性液剂150 m L/t薯块和75%抑霉唑硫酸盐可溶粒剂20 g/t薯块出库时防效分别为68.5%,79.2%和70.6%,出库后2周防效分别65.4%,74.1%和65.4%,均具有显著的防治作用,可作为防治马铃薯干腐病的有效药剂应用。

Potato dry rot, caused by Fusarium spp., is a worldwide post-harvest potato disease. In recent years, this disease becomes prevalent in Inner Mongolia, usually reducing potato tuber yield by 20%-30%. However, there is no effective control method for this disease at present. This experiment was conducted in potato storehouse during the years of 2014-2015 to assess the efficacy of Imazalil in controlling potato dry rot. The potato tuber was sprayed with four fungicides of 10% Imazalil SL, 75% Imazalil sulphate SG, 80% Merpan WDG and 70% Thiophanate-methyl WP. The results indicated that the control efficacy of 10% Imazalil SL 100 m L/t tuber, 10% Imazalil SL 150 m L/t tuber and 75%Imazalil sulphate SG 20 g/t were 68.5%, 79.2% and 70.6%, respectively, when the treated tubers were just moved out of the storehouse, and 65.4%, 74.1% and 65.4%, respectively, two weeks after treated tubers moved out of the storehouse.Imazalil and its sulphate performed stable control efficacies and could be used in controlling potato dry rot.