Question
What may be causing the roots to disappear? I grow primarily heirloom tomatoes from seed. This year plants are dying and when dug up there are no feeder roots only a woody bare taproot. the soft green outer sheath and all feeder roots and root hairs are missing.
    Should I solarize next years patch before planting?
Jay

Answer
Jay,

Sorry I took so long to answer your question.  It sounds like you have a boring insect like a wireworm in your soil. The solution I would recommend is not to grow tomatoes in that area for 2-3 years.  Make sure the soil is tilled well once or twice a year, that way birds will eat any exposed larve or worms that are exposed and they will not have plants to feed on.  You can grow other vegetables in the area, just not any night shade varieties such as peppers, eggplant, potatoes which the insect could feed on.  You could grow peas, beans, or lettuce.  Rotating your vegetables is essential to keep your soil more fertile and free of pests.  

I hope this helps.  If you have any other questions or comments please let me know.

Catherine
www.your-vegetable-gardening-helper.com