These chemicals are called insecticides.
An army of insects is called a swarm. This term is commonly used to refer to a large group of insects, such as locusts or bees, that move together in a coordinated manner.
Entomology is the branch of zoology that deals with insects. One reason it is important is that without insects then plants might be extinct.
Insects must be controlled because they can over populate. Some can be quite harmful to humans and others are just plain pests.
Harmful: ~Mosquitoes/flies can spread diseases like malaria. ~Wasps/Bees/Hornets can sting people ans sometimes kill. Beneficial: ~Silk comes from silkworms. ~Honey bees produce honey. ~Lady bugs eat pests. ~Insects are used by scientists to find out more about life and other things. Plus many more!
- using biological 'weapons': birds, insects, microorganisms to destroy these insects - using pheromones for trapping - using plants cultivars insensible to insects - using ultrasonic or electromagnetic waves emitters
Pesticides are used to keep away insects or other pests.
trying to control pests with chemical
Yes, it helps to get rid of insects pests.
In the United States, exterminators specialize in removing insects and other pests from homes, businesses, and schools. They also employ prevention strategies when working against insects and pests.
Bluebirds help control pests by feeding on insects such as caterpillars, beetles, grasshoppers, and spiders that can harm crops and gardens. They are particularly effective at catching insects in mid-air, making them valuable predators for controlling flying pests. By consuming large quantities of these pests, bluebirds help maintain a balanced ecosystem and reduce the need for chemical pesticides.
AlgicidesControl algae in swimming pools and water tanks.AntimicrobialsKill microorganisms (such as bacteria and viruses).AttractantsAttractants are traps containing a pesticide and food to lure insects or rodents inside. However, food is not a pesticide even though it certainly attracts pests...like ants at a picnic.Disinfectants and sanitizersKill disease-producing microorganisms in the kitchen and bathroom.FumigantsProduce gas or vapor intended to destroy pests in the house or in the ground.FungicidesKill fungi (including blights, mildews, molds, and rusts).HerbicidesKill weeds.InsecticidesKill insects and other arthropods.MiticidesKill mites that feed on plants and animals.Microbial pesticidesMicroorganisms that kill or inhibit pests, including insects or other microorganisms. Sometimes microorganisms get rid of pests simply by growing larger in numbers, using up the pests' food supply, and invading the pests' environment.MolluscicidesKill snails and slugs.NematicidesKill nematodes (microscopic, worm-like organisms that feed on plant roots).PheromonesBiochemicals used to disrupt the mating behavior of insects.RepellentsRepel pests, including insects (such as mosquitoes) and birds.RodenticidesControl mice and other rodents.
AlgicidesControl algae in swimming pools and water tanks.AntimicrobialsKill microorganisms (such as bacteria and viruses).AttractantsAttractants are traps containing a pesticide and food to lure insects or rodents inside. However, food is not a pesticide even though it certainly attracts pests...like ants at a picnic.Disinfectants and sanitizersKill disease-producing microorganisms in the kitchen and bathroom.FumigantsProduce gas or vapor intended to destroy pests in the house or in the ground.FungicidesKill fungi (including blights, mildews, molds, and rusts).HerbicidesKill weeds.InsecticidesKill insects and other arthropods.MiticidesKill mites that feed on plants and animals.Microbial pesticidesMicroorganisms that kill or inhibit pests, including insects or other microorganisms. Sometimes microorganisms get rid of pests simply by growing larger in numbers, using up the pests' food supply, and invading the pests' environment.MolluscicidesKill snails and slugs.NematicidesKill nematodes (microscopic, worm-like organisms that feed on plant roots).PheromonesBiochemicals used to disrupt the mating behavior of insects.RepellentsRepel pests, including insects (such as mosquitoes) and birds.RodenticidesControl mice and other rodents.
Pesticides. What exactly they are.. well, there are various types.
Insects
Crops such as corn, soybeans, and wheat are commonly grown with pesticide or other chemical additives to control pests, weeds, and diseases. Fruits like apples and grapes are also frequently treated with pesticides to prevent damage from insects and fungi.
Anti pest such as Urea, can kill insect pests. but urea can decrease the fertility of soil.
A. K. Bhattacharya has written: 'Survey and study of the bionomics of major soybean insects and their chemical control' -- subject(s): Control, Soybean, Insect pests, Diseases and pests, Ecology