75%苯醚·咪鲜胺WP对油茶软腐病防治效果试验

Effect of Difenoconazole-Prochloraz 75% WP against Agaricodochium camelliae

为开发防治油茶软腐病Agaricodochiumcamelliae新药剂,本研究在浙江省桐庐县林场瑶琳工作站马尾松Pinus massoniana林下套种油茶(浙江红山茶Camellia chekiangoleosa)林中,采用1.0 g·L~(-1)、1.5 g·L~(-1)、2.0 g·L~(-1) 75%苯醚·咪鲜胺WP防治油茶软腐病,对照药剂为25%吡唑醚菌酯SC,并设清水为空白对照。结果表明,75%苯醚·咪鲜胺WP对油茶软腐病的防治效果随着药剂浓度的增加而升高,施药后随着时间的增加,防治效果逐渐减弱,用1.0 g·L~(-1)、1.5 g·L~(-1)、2.0 g·L~(-1) 75%苯醚·咪鲜胺WP在油茶软腐病发病期对油茶全株喷雾,施药后10 d时的防治效果分别为66.33%、84.62%和90.81%,施药后20 d时防治效果分别为61.44%、80.28%和86.83%,1.5 g·L~(-1)、2.0 g·L~(-1)75%苯醚·咪鲜胺WP的防治效果与对照药剂25%吡唑醚菌酯SC的防治效果无显著差异。以上结果表明,75%苯醚·咪鲜胺WP可以作为油茶软腐病防治药剂,使用剂量以1.5~2.0 g·L~(-1)为宜。

Five sample plots were established in Pinus massoniana stand interplanted wih Camellia chekiangoleosa in Tonglu Forest Farm,Zhejiang province.On June 26th 2023,experiments were conducted on spraying 1.0 g/L,1.5 g/L,and 2.0 g/L Difenoconazole-prochloraz 75%WP on C.chekiangoleosa with pyraclostrobin 25%SC and water as control against Agaricodochium camelliae.Investigations were implemented on situation of disease 10 days and 20 days later.The results showed that spraying Difenoconazole-prochloraz 75%WP had effect of 66.33%,84.62%,and 90.81%10 days later,and 61.44%,80.28%,and 86.83%20 days later.There was no significant difference between the control effect of Difenoconazole-prochloraz 75%WP and pyraclostrobin 25%SC.The experiment concluded that Difenoconazole-prochloraz 75%WP could be used as fungicide against A.camellia with dosage of 1.5-2.0 g/L.