症状: 1、果实染病:接近成熟的果实染病,一开始呈现紫褐色小斑点,逐渐扩大,边缘褐色,中央灰白色略凹陷。病部继续扩大,致使果实软腐,干缩变为黑色或者灰蓝色僵果,棱角明显,病果上布满清晰的小黑粒点,这就是 ...
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