B. Optional methods are available by choice for people to use. It is best to use a combination of pest controls. Chemicals to destroy pests, control their activity or prevent them from causing damage. Pesticide mode of action Contact Stomach poison Systemic Fumigant Pesticide mode of action Contact Pesticide which kills when it comes in contact with the pest. Fumigant - Substance which produces a gas, vapor, fume or smoke intended to destroy insects, bacteria or rodents.
All pesticides have an active ingredient.
Synergism - Joint action of two or more active ingredients that is greater than the sum of their activity when used alone. Formulations - Pesticide preparations or mixtures. Others must be diluted with water, a petro- leum solvent or by air before they are applied. A formulation that is very low in concentration, used without dilution or mixing, usually a liquid, frequently applied via a trigger sprayer bottle. The labeling for a pesticide includes only the information found on the pesticide label.