Request for a scientific term

Nancy Chan ac10157 nachan at
Wed Feb 7 20:43:11 EST 1996

I would like to ask a scientific term:
If we use a population of insect to reduce another population of a certain
insect which is harmful to our crops.
How can we describe it?
Any E-mail reply will be apperciated!
Thank you very much! =)

With best wishes, 

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