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雪松主要病害与综合防治-实用技术-农博数据中心

　　主要病害症状与发生规律　　枯梢病　由珠形葡萄孢菌（Botrysis　latebricolaJapp）引起。　　危害症状　雪松的叶、枝梢、主干均受此病危害。　　（1）枯叶型　发病初期，在当年萌发的春梢上，新生针叶从叶尖开始发黄，. ....

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