Polyclonal response may be defined as the immune response that ensures the recognition and killing of the antigen. A particular antibody is produced to kill the specific antigen.
Antigens contain epitope that binds with the paratope of antibody.. The polyclonal response is generated due to the presence of multiple epitopes of the antigen. Polyclonal response increases the chances of development of auto immune disease.
That would be beneficial to them because they wouldn't lose as many trees to disease or insects, so they are able to sell more. That's what I got from it at least.