If you use liquid Sevin and spray in the evening when bees are back in their nests there is little risk to bees. If you use Sevin powder and spread it during the daytime when bees are active, you are possibly going to poison some bees and they may carry dust back to the nest where it will poison more bees. Sevin powder rates a 1 on the the health rating scale:
A cash crop is an agricultural crop which is grown for sale to return a profit. It is typically purchased by parties separate from a farm. The term is used to differentiate marketed crops from subsistence crops, which are those fed to the producer's own livestock or grown as food for the producer's family.
(B) CASH CROPS. (6) Cotton: Cotton is the most important cash crop of Pakistan in terms of area and value addition. It is the main foreign exchange earnings for the country with the production of 13.0 million cash return to the farmers.