Is it possible to multiply spider fauna in laboratory for the management of insects?
Probably not. Although some spiders can be reliably reared for research purposes, high quality diets have only been identified for a few species. Even for the species that can be reared, the labor and costs involved would most likely be prohibitive. Additionally, the proclivity for cannibalism among spiders complicates virtually any attempt to rear large quantities.
If you were lucky enough to acquire an egg case for the species you are interested in, you might be able to separate out a few babies. You would need to prepare as many containment devices as the number of spiders you wish to rear. Perhaps you could do some sweeps to get a collection of creatures so that each spider had a good supply of food. In Kashmir, what are the dates during which you could have these containers outdoors? Perhaps you could have fairly large (very fine) nets which you could put over tree branches and zip up to enclose prey and spider, and through which you can insert more prey as time goes on. This might be a very time-consuming project but might be worth doing with some assistance from students. Good luck!
Drosophila could be used to feed smaller species, but as you were told already, it's very time consuming.
Its not worth exercise in terms of time,tediousness and efficacy. Usually they have longer life cycle. In captivity they behave differently.Cannibalism is great issue.
I used to address your question to my grad studentsI, and I agree with Robert Pfannenstiel
Mass rearing of spiders is thought to be or impossible or inefficient. Control based on spider populations can be obtained by augmentation in the field. To get a higher density of spiders, enrichement of hiding and web making facilities as well as overwintering spots can be part of the management. Because when these are limited, cannibalism and migration will keep densities proportional.
Due to cannibalism its futile to think about their mass rearing. You can always go for the recharging (collecting spiders in crop straw), as used in conservation biological control.
Perhaps Akhtar is thinking about predatory mites. These phytoseid mites are produced in the lab commercially for years, like Phytoseiulus persimilis, an effective biological control for use against phytophagous spider mites.
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