Nope. Dust traps are the key.
You need to show that the farmer used the product improperly. He was negligent when he caused the coat to abrade from the seed.
You can't win in the aerial spraying case because the co defendants won't abandon the farmer.
The evidence isn't as solid. You can't prove the kill there either. You would need something like the dust traps to prove translocation. But, it's not a product defect due to negligence. You're supposed to spray it.