嘧霉胺对采后柑橘绿霉病的防治效果

Efficacy of pyrimethanil in controlling green mould of postharvest citrus

在实验室和贮藏库条件下,对嘧霉胺单剂、嘧霉胺与抑霉唑或嘧霉胺和咪鲜胺混剂防治柑橘绿霉病的效果进行了评价。室内实验结果表明:采用500或1000mg/L嘧霉胺单剂、500mg/L嘧霉胺+500mg/L抑霉唑或500mg/L嘧霉胺+500mg/L咪鲜胺混剂在接种后12～18h进行浸果处理,对由抑霉唑抗性或敏感菌株引起的绿霉病均有显著的防治效果,防效超过94%;500或1000mg/L的抑霉唑对敏感菌株的防效在93%以上,但对抗性菌株的防效低于70%。贮藏库防效试验结果表明:在具抑霉唑抗性菌系的贮藏库中,上述质量浓度的嘧霉胺单剂、嘧霉胺与抑霉唑、或嘧霉胺与咪鲜胺混剂对绿霉病的防治效果明显优于抑霉唑单剂;而在不具抗抑霉唑菌系贮藏库中的防效则与抑霉唑相当。由此认为:嘧霉胺可作为抑霉唑的替代药剂应用于柑橘的采后处理,其推荐使用质量浓度为500～1000mg/L,可单独使用,也可与抑霉唑或咪鲜胺混合使用。

The efficacy of pyrimethanil alone,pyrimethanil-imazalil or pyrimethanil-prochloraz mixtures were evaluated in controlling the green mould of postharvest citrus both under the conditions of laboratory and farmer s storage houses.In laboratory,aqueous fungicide solutions were applied by soaking citrus 12 to 18 h after inoculation.Pyrimethanil alone(at 500 or 1 000 mg/L),pyrimethanil-imazalil or pyrimethanil-prochloraz mixtures(at 500+500 mg/L)showed higher than 94% efficacy in controlling green mold regardle...