Plants under stress are more apt, to be attacked or damaged. Ideal germination conditions and rapid growth enable plants to out-compete or tolerate damage. Thin young plants to avoid over-crowding and weak growth. Properly identify what is causing the problem. Determine if the pest is a serious threat to the plant.
Most garden plants can tolerate some insect feeding, and pests can be washed off after harvest.
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.