HORT 100: Unit 18

Natural controls of insects can be accomplished by using

biological controls biorational controls mechanical controls

Insecticides that remain active in the environment for the longest period of time are

chlorinated hydrocarbons

Emulsifiable concentrates (ECs) are liquid insecticides that must be

diluted with water

Insecticides that come in the form of small pellets are scattered on the soil surface are called

granules

Synthetic compounds are insect controls that are

man-made pesticides

An example of an insecticide that is used as a fumigant is

methylbromide

Wettable powders (WPs) are powdered insecticides that

must be diluted with water

Biorational controls are

non-living materials not man-made synthetics Bad-tasting to the pest so it will not eat the plant

Stomach poison insecticides work best

on chewing insects

The insecticides that are most toxic to human beings are

organophosphates

Systemic insecticides are most effective in killing insects that feed by

sucking or chewing

When buying an insecticide to eliminate a specific insect, one should purchase a chemical

that is recommended for that insect only after reading the label that is safe to use

The proper amount of spray insecticide has been applied to a plant when

the liquid just begins to drip from the leaves

The legs of an insect are attached to the body part known as the

thorax

How many pairs of legs do insects have

three

Biological controls are living things that can attack the pests. One example of a biological control is

Bactius themoginus

An example of a synthetic organic insecticide is

Malathion

An example of a natural organic insecticide is

Rotenone

An example of an inorganic insecticide is

Sulfur

Application of dust insecticides requires

a duster no dilution a quiet day to reduce drift of the insecticides

An insecticide packaged in a pressurized can is called a

aerosol