不同药剂对晚熟甜瓜霜霉病的防治效果

甜瓜霜霉病对喀什地区中晚熟甜瓜生产威胁极大,如不采取防治措施,可造成重大危害,严重发病田块可能绝收。对7种杀菌剂的田间药效试验结果表明,施用72%杜邦克露可湿性粉剂、72.2%普力克水剂、80%大生可湿性粉剂和72%霜疫必克可湿性粉剂可有效控制这种病害,从发病初期开始每星期喷药一次可使病叶减少65%以上、病指减小90%以上。

Control Effect of Different Medicaments on Late-maturing Sweet Downy Mildew

Muskmelon downy mildew is a threat to the growth of middle and late maturing muskmelon crop in Kashi,Xinjiang.If no control measures were adopted in the field,this disease would cause severe damage for this crop and even a serious shortfall occurred in the yield .Experiments were carried out to control this disease with 7 different fungicides in serotinal muskmelon field.Results showed that 72% Cymoxanil WP,72.2% Propamocarb hydrochloride SL,80% Mancozeb WP and 72% Shuangyibike WP gave very effective control with percentages of diseased leaf and disease index were reduced by over 65% and over 90%,respectively,if the medicaments were sprayed upon the diseased plant once a week at the beginning of the symptoms of downy mildew.