几种新药剂对苹果斑点落叶病和梨黑星病的防治效果

为了筛选适宜防治苹果斑点落叶病和梨黑星病的药剂和使用剂量,对好力克、福星、世高、安泰生、大生M-45和烯唑醇等6种新农药进行了田间药效试验。结果表明,70%安泰生WP700倍液、80%大生M-45WP800倍液和12.5%烯唑醇1000倍液对苹果斑点落叶病的防治效果分别达到88.41%、85.99%和85.24%;43%好力克SC4000倍液、40%福星EC5000倍液、10%世高WG3000倍液、80%大生M-45WP800倍液、70%安泰生WP700倍液和12.5%烯唑醇WP1500倍液对梨黑星病均有良好防效,防治效果均超过80%。上述药剂在所使用的剂量范围内,对苹果和梨安全无药害,建议在生产中推广应用。

Control Efficiency of Several New Chemicals on the Alternaria Leaf Spot of Apple and Scab of Pear

The several new chemicals of tebuconazole,flusilazole,difenoconazole,propineb,mancozeb and diniconazole were experimented in apple and pear orchard to select suitable bactericides and dosage on control the alternaria leaf spot of apple(Alternaria mali Roberts)and scab of pear(Venturia nashicola Tanaka et Yamamoto).The result showed that the control efficiency of 70% propineb WP 700-fold,80% mancozeb WP 800-fold and 12.3% diniconazole 1000-fold on the Alternaria mali reached 88.41%,85.99% and 85.24%,respectively.The control efficiency of 43% tebuconazole SC 4000-fold,40% flusilazole EC 5000-fold,10% difenoconazole WG 3000-fold,80% mancozeb WP 800-fold,70% propineb WP 700-fold and 12.5% diniconazole WP 1500-fold on the Venturia nashicola was all good,their control efficiency overtook all 80%.The above new chemicals in the dosage of this experiment were safe and not poison on the apple and the pear.So we recommend to use the chemicals in production of apple and pear fruits.