梨黑星病及其防治梨黑星病在管理差的梨园发生严重，病果率可高达８０％以上，造成早期落叶和减产，并且影响下年的产量。１发病规律梨黑星病以菌丝和分生孢子在芽鳞内或病枯枝、病落叶中越冬。来年芽萌动时，在芽鳞越冬的病原产生分生孢子，再次侵染；在病枝、落叶中越冬... Pear scab and its prevention Pear scab in the poor management of pear orchard serious disease rate can be as high as 80%, resulting in early deciduous and cut, and affect the next year’s output. 1 pathogenesis pear scab with mycelium and conidia in the bud scales or disease dead branches, diseased leaves wintering. Bud sprouting in the coming year, the sprout in the pathogen overwintering produce conidia, re-infection; in diseased branches, deciduous wintering ...