8种杀菌剂对西兰花菌核病的防治效果及对制种产量的影响

摘要

In order to screen effective fungicides for the control of Sclerotinia sclerotiorum of broccoli for seed production,the control effects of eight fungicides were investigated in field.The results showed that all eight fungicides could control S.sclerotiorum.Among which,40％ dimethachlon WP had the highest control effect with control efficacy up to 99.19％.The seed production increased by 167.05％ compared with blank control and the 1 000-grain weight reached up to 5.38 g after application of this fungicide.The control effects of 2 × 108 living conidia/g Trichoderma WP and 50％ procymidone WP were lower than 40％ dimethachlon WP with control efficacies of 82.39％ and 81.69％,respectively.The seed production increased by 147.44％ and 151.70％,the 1 000-grain weight was 5.34 g and 5.36 g,respectively,after application of these two fungicides.The control effects of other fungicides ranged from 51.06％ to 73.23％,and the seed production increased from 76.99 ％ to 107.39％,and 1 000-grain weight varied from 4.73 g to 5.28 g.The 1 000-grain weight of blank control was 3.23 g.In conclusion,40％ dimethachlon WP,2 × 108 living conidia/g Trichoderma WP and 50％ procymidone WP were recommended for the control of Sclerotinia sclerotiorum and should be used by rotation.%本文开展了8种杀菌剂对制种西兰花菌核病的防治效果试验.结果表明8种杀菌剂均有防治效果,以40％菌核净可湿性粉剂的防治效果最好,防效为99.19％,比空白对照增产167.05％,千粒重最高,达到5.38 g;其次为2亿活孢子/g木霉菌可湿性粉剂和50％腐霉利可湿性粉剂,防效分别为82.39％和81.69％,比空白对照分别增产147.44％和151.70％,千粒重分别为5.34和5.36g.其他杀菌剂的防治效果为51.06％～73.23％,比对照增产76.99％～107.39％,千粒重为4.73～5.28 g,空白对照的千粒重为3.23g.综合分析认为,制种西兰花菌核病的防治可选用40％菌核净可湿性粉剂、2亿活孢子/g木霉菌可湿性粉剂和50％腐霉利可湿性粉剂等3种杀菌剂,并交替轮流使用.