新西兰斐济果树的叶子上长黑斑是什么原因
在新西兰
请教大家，两周前种的斐济果树，现在叶子上开始长黑色斑点， 或者是叶子的边缘长一圈黑色的，这是什么原因呢，怎么治疗？
万分感谢！！
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ddddddddddddddddddddddddddddddddddddd
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没人回答，我自己找答案，希望能帮到大家Sooty moulds are fungi which cover plant leaves, stems and twigs in a black sticky substance. In almost all cases, the sooty mould is secondary to an infestation of insects that secrete honeydew. These insects include aphids, scale, mealybugs and white flies. Treating the insects will remove the source of the honeydew and dry up the sooty mould, which will eventually fall or wash off the foliage. The mould itself does not feed on the plant, however as it covers the leaf surface, it is blocking light and reducing photosynthesis, essential for plant growth. 网站上还说用pest oil就可以，我试试看，然后再告诉大家哟
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如果只是一片叶子上有，没太大关系，喷些liquid copper就好了。现在水分大，容易涝，气温有所回升，要防止各种菌类滋生
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非常感谢
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不用管，我种的那颗之前也是，过阵子就会好了。
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发霉了~~也许是根部生长受到阻碍~~~也许是太潮~~总之植株不够强壮~~施施肥剪剪枝移个大盆多晒太阳很快就会好啦~~~
实在不行就去买瓶rose gun 喷个一个星期就会好了~~~
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谢谢，已经喷过药也施了肥，现在正茁长成长呢