Some companies were seen to provide technical assistance to the farmers. Thus, farmers come under considerable pressure from commercial companies to use a variety of products in their farms. There are new products being made available continually and often there is very little information available about their efficacy. There is no doubt that some products are very useful, however, may not perform as claimed and farmers must evaluate the cost and benefits of treatment before investing in any products. Products should not be used at all if they are harmful to the farm workers and leave potentially harmful residues in fish/shrimp at harvest or damage the environment inside and outside the farm. Some of the compounds used can be very harmful to humans. Information on how the product works should be studied. Several products have been sold without any explanation of their action.