戊唑醇与羟菌唑对小麦赤霉病的田间防效试验

2001~2003年,对不同药剂防治小麦赤霉病的效果进行了田间试验研究。结果表明,接种前2,3 d和接种后2,3,5 d喷施三唑类杀菌剂,与接种未喷药对照相比,戊唑醇可使小麦赤霉病病情指数减少76.47%~78.67%,籽粒中毒素含量减少64.19%~81.39%,增产10.81%~21.15%;羟菌唑可使小麦赤霉病病情指数减少74.64%~82.06%,籽粒中毒素含量减少42.43%~88.01%,增产11.01%~13.35%;大田示范试验中,处理区小麦赤霉病病情指数比对照区平均减少91.92%;对照药剂多菌灵与利德隆对小麦赤霉病也有很好的防治效果。

Chemical control of Fusarium head blight on wheat

The effects of different chemical substances on infection and mycotoxin production of Fusarium graminearum in wheat were investigated in field trials for 2 years.The result showed that,with fungicide treatment either 2 and 3 days before or 2,3 and 5 days post inoculation,Tebuconazole reduced the disease index of the spikes by 76.47%-78.67% and the toxin deoxynivalenol(DON) in the grain by(64.19%-)81.39% as well as increased grain yield by 10.81%-21.15% in comparison to the untreated control.Metaconazole led to decreases of the disease index by 74.64%-82.06% and the DON content in the grain by 42.43%-88.01% and increased grain yield by 11.01%-13.35% compared with the untreated plants.In the large area trials,the disease index reduced 91.92% averagely after treated with metaconazole.Fungicides Carbendazim and Lidelong have good effects in controlling the Fusarium head blight.