Eggplant Integrated Pest Management AN ECOLOGICAL GUIDE

_______________________________________________________________________Key to some common eggplant problemsAffectedplant partGeneralsymptomSpecific symptom(s) Possible cause sectionleaf blight Brown areas on leaves, often on leaf Too much fertilization -marginsleaf blight Brown areas on leaves Pesticide burning -leaf blight Leaves turn brown and die, no Bacterial wilt 8.3.1specific leaf spots visibleleaf blight Leaves turn brown and die Fungal wilt 8.3.2leaf deformation Leaves wrinkle and can remain very Aphids 5.5smallleaf dwarfing Leaves are extremely small Jassid 5.4leaf dwarfing Leaves are extremely small Little leaf 8.2.3leaffeeding Leaf tissue gone, sometimes only leaf Epilachna beetle 5.2damage tissue between the veinsleaffeeding Leaf tissue has been “scraped” Epilachna beetle 5.2damageleaf mosaic Leaves show mosaic pattern of Jassid 5.4yellow and green patchesleaf rolled leaf Leaves are rolled lengthwise, may be Leafroller 5.7brown and dry.leaf rot Soft, watery rot with white, moldy Sclerotinia stem rot 8.4.1growth on stems, petioles, andleaves. Often on leaves touching thesoil.leaf spot Leaf spots: on established plants, Early blight 8.2.2dark brown spots with dark concentricrings develop first on oldest leaves.The concentric rings give the spot atarget appearanceleaf spot Leaf spots are gray-brown, clearly Phomopsis rot 8.2.1defined, circular. Center of the spotturns gray, and black pycnidia (smallpustules, fungus reproductivestructures) develop in this area.leaf spot Water-soaked leaf spots, irregular Root rot 8.1.2shapedleaf spot Brown-black sticky layer on leaves Aphids 5.5and stemsleaf wilting Leaves wilt, sometimes recover or die Fungal wilt 8.3.2leaf window Soft outer leaf tissue gone, thin layer Epilachna beetle 5.2left like a “window”leaf yellowing Leaves: Yellowish area may develop Early blight 8.2.2on leaves containing leaf spots andeventually, the leaves turn brown andusually drop from the plant.leaf yellowing Leaves with dark leaf spots turn Phomopsis rot 8.2.1yellow and die.leaf yellowing Yellowing and wilting of leaves Southern stem rot 8.4.2leaf yellowing Yellowing of lower leaves. Leaves wilt Fungal wilt 8.3.2and defoliation occurs.leaf yellowing Leaves look “silvery” in color,Red spider mite 5.3particularly along the veinsleaf yellowing Leaf edges become yellow Jassid 5.4leaf yellowing Leaves have a silvery appearance, Thrips 5.6may be stuntedleaf yellowing Leaves turn yellow Whitefly 5.8leaf yellowing Older leaves are light green or yellow Nitrogen deficiency -root deformation Enlargement of the roots (root-galls) Rootknot nematodes 8.1.3root rot Roots are rotten, plant dies Root rot 8.1.2seedling leaf spot Dark spots on the seed leaves(cotyledons), and true leaves may killleavesEarly blight 8.2.2164Eggplant Ecological Guide