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They help our enviorment by killing other harmful insects.
the insect will eat the plant so it will spread through the plant into the insect killing the insect.
There are different methods available for protecting trees from insects. Chemical sprays such as insecticidal soaps and horticultural oils as well as trunk or soil injections help killing insects. Though at long term the best way is releasing other insects that feed themselves with the insects you're battling with.
One example is the use of a bacteria called Bacillus thuringiensis on certain crops such as members of the cabbage family to help control Lepidopteran insects. The insects eat leaves which have the bacteria on them, and the bacteria have a protein which is toxic to the caterpillar, killing it.
A carbon dioxide bug zapper is effective in attracting and eliminating insects, as it uses CO2 to mimic human breath and lure insects towards the device. The combination of CO2 and other attractants can help increase the zapper's effectiveness in trapping and killing insects.
an insecticide is anything that kills insects. if said insect is a crop damaging pest then killing it will help the farmer gain a better crop
Yes, I can help you identify the insects in your garden.
We can help by not killing them
There are many insects that help a garden grow such as ladybugs.
Spiders eat most insects
Bees
It attract insects and insects help in pollination