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油茶煤病由一种名叫绵蚧壳虫(Metacero-nema japonica Mask)的害虫引起的,它能分泌一种蜜汁,蜜汁落到叶面,霉菌就在叶面上生长,形成漆黑菌丝层,落到地被物上,地被物就发黑。绵蚧多分布在高山,所以高山就经常发生煤病。先有虫,后发病,虫绝病退。总起来讲,病虫间的互相关系是:煤病病菌靠绵蚧蜜汁生存,绵蚧又靠油茶树汁为养料。由此可见,绵蚧不仅直接危害油茶,还为煤病发生提供营养条件。因而只有扑灭害虫,才能根治煤病。达到保护油茶的目的。
Camellia is caused by a pest called Metacero-nema japonica Mask, which secretes a nectar that falls to the foliage and mold grows on the foliage to form a black mold Silk layer, fell on the ground, the ground is black. Melastoma multi-distribution in the mountains, so frequent mountainous coal disease. The first worm, after the onset of insects extinction retreat. In general terms, the relationship between pests and diseases are: coal disease by Melanogaster honey nectar survival, cottonseed relies on tea tree sap for nourishment. This shows that cottonseed melanes not only directly endanger the tea, but also provide nutritional conditions for the occurrence of coal disease. Therefore, only the suppression of pests in order to cure coal disease. To protect the purpose of Camellia.