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