"The current study investigated mulberry tree (Morus alba) plantation, silkworm cultivation, and silk production as phytomanagement options."
Is this a problem in China? The reported problem is one of pesticide and nothing has been heard of soil being contaminated.
History has proven the opposite. They proved it was a pesticide problem by using typical non commercial silkworms. This showed that it was not a problem with the GMO silkworms and a food source issue.