They are, they keep bugs off of crops such as corn and tobacco.
A useful young man
biology is useful in every one
giraffes useful to mankind ?
yes , i think insecticides are irritant substances
"Insecticides" is a plural noun.
mountains are useful to man because they are rich in minerals and the water over there is fresh and it has fertile soil.
sulfur is used in the production of gun powder, explosives, insecticides, fungicides, fertilizers and some medicines.
There are many animal products that are very useful to man. Five of the most useful are beeswax, leather, pearls, feathers, bone, and fur.
Yes. It is the plural of insecticide, as in, "There are various insecticides from which to choose."
CFC's are useful to man. They act as coolants.
yes
Asphalt, gasoline, fuel oil and insecticides. Also: all types of plastics, fertilizers, rubber, perfumes, and many more useful things.