B. Sampling techniques - Direct Estimates 1. In situ counts - in place counts a. Not used for livestock sampling 2. Knockdown a. Insects removed by jarring plant material, using chemicals or heat. Washing plants for aphids 3.
Trap is set and left alone, obtain sample later.
Continuous sampling techniques. Attractive or passive in nature. Black light 2. Black light and CO2 - mosquitoes 3. Visual Traps - apple, yellow, baits f. Passive Traps 1.