Insecticides used in the garden come either in solid or liquid form. Dusts, baits and granules are applied dry. Baits are mixed by the manufacturer with a pest attractant; dusts and granules are mixed with an inert carrier. Three types of insecticides are applied wet emulsifiable concentrates (EC), soluble powders (SP), and wettable powders (WP). These last are mixed with water and transferred to spray apparatus.
When applying either dusts or sprays, it is important to make sure that they cover all surfaces of the infested plants. It's also important not to apply them to yourself or to anyone else. Cover your body with protective clothing; wear a broad-brimmed hat and gloves too. Try not to get any of the liquid or powder on your skin; if you should, wash it off right away.
The chemical insecticides most frequently used in the garden are carbaryl, malathion and diazinon. (These are generic names; different manufacturers may give them different brand names. For instance, a popular make of carbaryl is Sevin.) Two other chemicals, trichlofon and methoxychlor, are also used at times, along with a host of minor preparations. Some manufacturers put out preparations combining two or more ingredients.
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