Insect pests are a major problem for many people, as they can cause damage to crops, spread disease, and be a nuisance in the home. Two common insect pests are gnats and BITERS. Gnats are small flying insects that feed on plant nectar and other organic matter. They are often found in large swarms and can be difficult to control. BITERS are larger insects that feed on blood, usually from humans or animals. They can cause painful bites and transmit diseases.