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Harmful insects include aphids, whiteflies (eat our crops), mosquitos (carry disease), fleas and lice (suck blood). However, the insects that eat our crops mostly only do so because we practise too much monoculture and kill off their predators with insecticide. The herbivores such as aphids and whiteflies reproduce fast enough to build up resistance, whereas their predators such as ladybugs do not.
Useful insects include those ladybugs (eat aphids etc), parasitic wasps (kill many harmful insects), and bees (pollinate plants and make sure they can reproduce and bear fruit).
What else can I help you with?
What is 1 harmful affect for erimin-5?
1 harmful affect for erimin-5 = -4
How many moths in the year have 28 days on them?
Moths are insects and insects do not have days on them. So there!
Heather had to collect insects for her biology project She was able to collect 126 total insects She collected 5 times as many insects that could fly as insects that couldn't fly. How many could fly?
Flying insects = f Non-flying insects = n n+f=126 f=5n n+5n=126 6n=126 n=21 non-flying insects f=5*21 = 105 flying insects
What is the density of an object with a mass of 16 grams and a volume of 5?
The density is 16/5 grams per some unknown unit of volume - not a particularly useful measure of anything!The density is 16/5 grams per some unknown unit of volume - not a particularly useful measure of anything!The density is 16/5 grams per some unknown unit of volume - not a particularly useful measure of anything!The density is 16/5 grams per some unknown unit of volume - not a particularly useful measure of anything!
Importance of statistics in your daily life?
I'd say 4/5 of the time they are 92% useful
How are birds useful in gardens?
By destroying large numbers of harmful insects.
5 useful and 5 harmful drugs?
All drugs can be useful or harmful, if not taking correctly or for the right reason.
How is cobalt-60 radiation useful in preseving fresh fruits and vegetables?
Gamma radiation destroy harmful microorganisms and insects.
Are lions harmful or useful?
lion are useful and harmful
Is a ameoba harmful or useful?
It is not harmful. Also it is not useful
What are non harmful insects called?
they have no particular name,they are called non harmful insects
What are Useful and Harmful Changes?
The changes talking place in our surroundings and which are useful to us are called Useful changes. The changes which are not useful but harmful are called Harmful changes
Is a butterfly useful or harmful?
useful
Why do you have wasps?
Wasps kill an enormous amount of insects like flies, cockroaches and aphids. They eat a lot of caterpillars and small white larvae that feed on vegetables. They maybe harmful sometimes but generally are useful insects.
You cook some chips in the oven useful or harmful?
i think its both harmful and useful
Which are harmful and useful to human being?
Ozone at ground level is harmful. It is useful in stratosphere as it protects us from harmful UV rays.
Is oxygen useful or harmful?
It is useful because we can breathe it.
