降香黄檀炭疽病的化学防治研究

Chemical Control of Anthracnose of Dalbergia odorifera

通过室内测定15种杀菌剂对降香黄檀炭疽病菌的毒力,选出5种效果较好的药剂,即多菌灵、咪鲜?戊唑醇、恶醚?咪鲜胺、苯醚?甲环锉和根太阳,5种药剂在稀释500倍时,对菌丝生长抑制效果均是100%,对孢子萌发抑制率接近或达到100%。将此5种杀菌剂对降香黄檀进行保护和治疗试验,发现所有杀菌剂的保护效果均在50%以上,500倍的恶醚咪鲜胺和咪鲜戊唑醇对降香黄檀治疗效果最好,分别是87.59%和83.10%。进一步选取恶醚咪鲜胺和咪鲜戊唑醇进行田间防治试验,500倍液的咪鲜戊唑醇防治效果较好,达到79.28%。

5 effective fungicides against anthracnose pathogen of Dalbergia odorifera were screened through laboratory toxicity tests from 15 chemicals. They are： Carbendazim, Tebuconazole, Prochloraz, Difenoconazole and Gntaiyang. When their concentrations were diluted 500 times, the inhibitory effects of all 5 fungicides on mycelial growth were 100%, and the inhibition rates on spore germination were almost 100%. These fungicides were then used in experiments of leaf protection and cure treatment against the pathogen. The results showed that the protective effects of all fungicides were more than 50%, of which 500 times Prochloraz and Tebuconazole achieved the better cure effect： 87.59% and 83.10%, respectively. Prochloraz and Tebuconazole were further applied in the field control experiment, and the results showed that 500 times of Tebuconazole achieved the best control effect： 79.28%.