正确育种用种预防白垩病
Journal of Bee（2010）
Abstract
<正>白垩病的病菌与青霉菌等真菌一样,在自然界广泛存在。抗病力强的蜂群接触到病菌不会发病,抗病力差、群势弱的蜂群在气候不正常等外界不良条件下,马上就会得病,轻者群势、产量严重下降,重者
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