It would be really helpful, if you could provide me with some important information regarding cotton crop cultivation. I would like to know whether it is possible to know the outbreak of pest by knowing the environmental parameters like temperature, humidity, sloar radiation etc. in cotton crop cultivation. If possible please provide me with some links which contains the details regarding the pest contol and pest management issues too. It is very urgent for my thesis work.

That's a huge subject, as you probably know. Here's a start on those links:
http://www.google.com/search?num=100&hl=en&lr=&safe=off&q=%22pest+control%22%22cotton+production%22&btnG=Search