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梨树受赤、黑星病菌侵害后 ,如果不认真防治 ,危害甚大。采用药物防治措施是必要的 ,但易复发 ,难绝其后。笔者通过实验 ,采取一种特异的免疫防治方法 ,获得了极其显著的效果。 本实验在幼树上进行。春季当从幼树的叶片上观察到疫病斑点及在增生时 ,先用除锈剂(三唑酮 )把病
Pear by red, black star bacteria attack, if not serious prevention and treatment, is very harmful. The use of drug control measures are necessary, but easy to relapse, hard-won. The author through experiments, to take a specific method of immune control, obtained extremely significant results. The experiment is carried out on saplings. In spring, when spotting of blight on the leaves of saplings and in hyperplasia is observed, first with the rust remover (triadimefon)