gall disease leaves blackboard tree alstonia scholaris infected with pathogens |
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| navigate by keyword : gallinaceous development pauropsylla tuberculate temperature herbivorous irritation blackberry blackboard occurrence outgrowth scholaris psyllidae hemiptera flowering undefined abnormal bacteria majority alstonia crawford seasonal pathogen disease insects psyllid jumping secrete tissue leaves fungus tender infect plant fungi cause tumor stems crown cedar apple aphid flies twigs fauna green gall host rose leaf mite wasp tree lice lerp bug |
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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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