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默默关注
2018-03-10, 5569 Views
默默关注
大家看看这个花怎么了?还有救吗?
大家看看这个花怎么了?还有救吗?
大家看看这个花怎么了?还有救吗?
大家看看这个花怎么了?还有救吗?
大家看看这个花怎么了?还有救吗?
大家看看这个花怎么了?还有救吗?
大家看看这个花怎么了?还有救吗?
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病害多从叶柄基部开始发生,首先产生黄褐色病斑,并沿叶柄向上扩展到叶片,病叶逐渐凋萎枯死。病斑延及树干产生紫褐色病斑,导致维管束变色坏死,树干腐烂,叶片枯萎,植株趋于死亡。在枯死的叶柄基部和烂叶上,常见到许多白色菌丝体。当地上部分枯死后,地下根系也很快随之腐烂,全部枯死。
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治疗:可用国光英纳、国光松尔500-600倍液喷雾,或刮除病斑后涂药,有一定防治效果
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像侵染了干腐病。
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