Learn what insects spread what disease. Improper Varieties Planted. Proper placement of variety is important. Choose a location which gets as much light as needed by the plant for proper growth. Choose the correct variety for your area.
Heirloom varieties are stronger and more suited for organic gardening.
Write to Abundant Life Foundation or Seeds of Change. See Resources Directory for their address. Resources Use Trap crops in addition to various types of traps which attracts the pests away from the garden. Improper Planting Time. Observe the correct planting dates on vegetables, etc for best results.