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Why are there more insects on crop plants than wild plants?
Crop plants are more susceptible to insects
What type of crop is destroyed by insects?
corn
What are the modes by which insects affect the crop yield?
Insects can damage the crop by biting off and eating parts, chewing on it, piercing and then sucking out sap, and by vectoring in disease.
What are the ways that insects attack crop plants?
they eat them.
How much of the worlds crop is destroyed by insects yearly?
~25%
Why does killing insects on crops increase crop yield?
the insects don't eat/ damage crops and it allows to kill insects carrying plant disease.
Why were Sparrows introduced to New Zealand?
To eat crop destroying insects
What do baby sparrows eat?
seeds from their parents crop
One advantage of crop rotation is?
Nutrients in the soil are replenished.
If a famer saw lots of insects on a cereal cropwhy might he or she use an insecticde?
To kill the insects before they eat the crop.
What is the differences between helpfull insects and harmful insects?
Well harmfull insects are those that do damage to crops and helpfull insects are insects that help crops by either A:helping in the pollination of the crop or B: by eating or driving out those insects that are harmfull to the crops
What is the advantage of having a storage organs such as a crop?
it is an worm's bodies of water.
