Prevention is the organic farmer’s primary strategy for disease, weed, and insect control. By building healthy soils, organic farmers find that healthy plants are better able to resist disease and insects. Organic producers often select species that are well adapted for the climate and therefore resist disease and pests. When pest populations get out of balance, growers will try various options like insect predators, mating disruption, traps, and barriers. If these fail, permission may be granted by the certifier to apply botanical or other non-persistent pest controls under restricted conditions. Botanicals are derived from plants and are broken down quickly by oxygen and sunlight.