The document discusses disease cycles involving insects and plant diseases. It includes an example of the typical disease cycle of anthracnose caused by Gnomia spp. and a diagram of the disease cycle of barley yellow dwarf virus transmitted by aphid vectors. It also shows the disease cycle of Stewart's bacterial wilt and blight caused by the corn flea beetle gut.

1. Disease Cycles Of Insects In Relation To Plant Diseases
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Figure. Example of a disease cycle.
Typical disease cycle of anthracnose caused by Gnomia spp.
Fig: Barley yellow dwarf Virus
Diagram of an aphid vector feeding on a plant host showing the internal transmit of virus to the
body Where it is multiply within the body and spread disease from one barley plant ton another.

2. Disease Cycles Of Insects In Relation To Plant Diseases
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Fig: Disease Cycle Stewart's Bacterial Wilt and Blight cause by Corn Flea Beetle Gut
RANA SALAH-UD-DIN