(defendant’s herbicide, marketed for use on sweet potatoes beginning in 2005, caused severe damage to plaintiff’s potato crop; plaintiff sued on claims of breach of contract, negligence, negligent misrepresentation, breach of warranty, design defect, and that defendant liable under state Unfair Trade Practices Act and state product liability law; defendant’s summary judgment motion granted as to negligence, negligent misrepresentation and state Unfair Trade Practices Act claim, and denied as to other claims).