gall disease leaves blackboard tree alstonia scholaris infected with pathogens |
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| navigate by keyword : gall disease abnormal development outgrowth host plant tissue irritation bacteria fungi insects cause tumor leaves stems crown blackberry rose cedar apple leaf fungus aphid mite wasp flies majority blackboard tree alstonia scholaris tender twigs gallinaceous pauropsylla tuberculate crawford seasonal occurrence pathogen temperature psyllid psyllidae jumping lice infect bug hemiptera flowering herbivorous fauna secrete lerp green |
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| Gall disease is an abnormal development or outgrowth of plant tissue resulting from an irritation caused by bacteria, fungi, or insects. Bacteria may cause tumors on the stems and crowns of such plants. There are various types of galls, for example crown gall, Oak apple gall, Cedar apple leaf galls and oak hedgehog galls etc. Insects like aphids, mites, wasps, and flies cause the majority of plant galls. |
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