If the pest is very destructive, try to use the least disruptive method of pest control. Injury to plants should be avoided. Cuts, bruises and spots of insect damage are often sites of disease infection. Check plants for injury and insects before purchasing and planting. Weeds and grass often harbor insects and diseases and compete with garden plants for moisture and nutrients.
Mulches can suppress weeds.
Heavy rains can splash soil onto lower leaves and bring them into contact with soil-borne diseases. Mulches can reduce this soil splash. Select disease and insect resistant varieties of plants which are adapted to local growing conditions. Rotate crops, when possible. Crop rotation can reduce the buildup of soil-borne diseases.