How can an understanding of the "mortality factor" lead to a successful biological control of pests in agriculture & horticulture?

Check these sites.

http://72.14.209.104/search?q=cache:taS99s4LDW0J:cals.arizona.edu/crop/cotton/insects/wf/horticultura0204.html+mortality+factor+insects&hl=en&ct=clnk&cd=1&gl=us&ie=UTF-8

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