Dealing With Vegetable Diseases: Viruses, Parasitic Nematodes, Plus Vegetable Diseases at a Glance


| 9/20/2013 4:47:00 PM


Tags: Vegetable Diseases, Garden Health, Viruses, Nematodes, Bacteria, Fungi, Karen Newcomb,

Karen Newcomb

Viruses are complex single molecules that act like living organisms. There are more than 200,000 of these marauding molecules to an inch. To identify viruses, plant pathologists usually group them together by what they do to the plant. Viral diseases often show up as a distortion (puckering or curling) of leaves, flowers, or fruits; stunted plants; yellow streaking; or mottled leaves.

A few of the viruses that affect vegetables are aster yellows (plants are stunted and yellow), curly top (dwarfed plants with bunched, curled leaves), mosaic (leaves have mottled yellow or light green areas), ring spot (yellow or brown concentric rings), and yellows (plants are uniformly yellow, may wilt and die).


Curly Top Virus. Courtesy T.A. Zitter, Cornell University

Escarole Plant With Mosaic Virus

NebraskaDave
9/26/2013 8:27:24 PM

Karen, I guess I am just very lucky gardener. My new garden spot has not been plagued with any of the things you mentioned in your post. The only thing that's really needed is tilth in the soil. The soil is rich black river bottom soil about two feet deep but lacks the compost to keep it from getting real sticky when wet. It's not clay but what we call gumbo soil. In a couple years I'll have that corrected for sure. There's literally tons of yard waste just from my neighborhood during the fall leaf cleanup. It's a perfect mix from the fallen leaves and the mowed grass that's been mulched up through the lawn mower and bagged for yard waste pickup. Last year I snagged close to 600 bags and hope to do the same this year. Thanks for all the great information that you post. Have a great day in the garden.





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