Some diseases can be controlled by changing the planting date. Warm-season vegetables, like peas and okra, should be planted after soils warm sufficiently to avoid seedling disease. Obtain Disease-Free Planting Stock. It is advisable to check transplants such as cabbage, tomatoes, peppers, and others for root knot nematode galls. Certified Irish seed potatoes are less likely to harbor a disease such as black leg.
Cultural practices Select the best site .
Choose a site with deep, well drained soil. Plant on raised beds. Raised beds improve drainage. They also warm up faster than level soil which aids in faster emergence. Slow emergence increases chances of seedling disease.