Now is a good time to clean up the garden. Garden clean-up done well is good exercise, aids in sanitation of the area, and is an excellent and effective plant disease control practice. Many disease causing fungi and bacteria can survive the winter on diseased roots, stems, leaves, or fruits and cause problems next year.
Remove all the plants (except cover crops or winter vegetables) from the vegetable garden. Dig up the roots and take them away as well. Roots left to decompose in the soil can release microbes next year.