Mulch with wheat stalks
(Broken Bow, Oklahoma)
Use wheat stalks, after harvesting, as a mulch. They're also known as wheat straw or hay. You usually can buy a bale of it and spread it around your plants, if you don't grow your own.
It works throughout the garden, not just on tomatoes. Wheat stalks keep soil moist and keeps weeds out -- or at least to a minimum.