不同药剂对山地橘园柑橘疮痂病的防效及安全性的影响

Effects of Different Medicament on the Control and Safety ofSphaceloma fawcettii in Mountain Orange Garden

柑橘疮痂病是南方山地橘园中发生普遍、危害严重且难以防控的一种真菌性病害.为了筛选安全高效、经济适用的柑橘疮痂病防控药剂,选取氟唑菌酰羟胺、苯醚甲环唑、氟唑菌酰羟胺·苯醚甲环唑、唑醚·代森联、烯肟·戊唑、啶氧菌酯、代森锰锌等7种高效低毒杀菌剂作为供试药剂,依照杀菌剂田间药效试验准则开展田间药效试验,试验结果表明,除80%代森锰锌可湿性粉剂(WP)外,其他6种药剂处理防效均高于75%.其中,60%唑醚·代森联水分散粒剂(WG)防效最佳,可达82.82%;其次为250 g/L啶氧菌酯悬浮剂(SC)、 18%氟唑菌酰羟胺·苯醚甲环唑悬浮剂(SC)、 20%烯肟·戊唑醇悬浮剂(SC)、 200 g/L氟唑菌酰羟胺悬浮剂(SC),防效分别为82.69%, 81.25%, 80.33%和80.14%,此5种药剂适宜在柑橘生产上大面积推广应用.所有供试药剂处理对柑橘安全,无不良影响.

Citrus scab is a common,serious and difficult to control fungal disease in mountain citrus orchard southern China.In order to screen the safe,efficient,economical and applicable agents for prevention and control of citrus scab,seven high efficiency and low toxicity bactericides,pydiflumetofen,difenoconazole,pydiflumetofen·difenoconazole,pyraclostrobin·me-triam,tebuconazole·SYP-1620,picoxystrobin,mancozeb,were selected as the test agents to carry out the field efficacy test according to the guidelines for field efficacy test of fungicides.The test results show that except for 80%mancozeb WP,the control effects of the other six medicaments were higher than 75%.Among them,60%pyraclostrobin·me-triam WG had the best control effect of 82.82%,and followed by 250 g/L picoxystrobin SC,18%pydiflumetofen·difenoconazole SC,20%Tebuconazole·SYP-1620 SC,and 200 g/L pydiflumetofen SC,with the control effects of 82.82%,81.25%,80.33%and 80.14%,respectively.These five medicaments are suitable for large-scale application in citrus production.All the tested medicaments had no adverse effect on the safety of citrus.