回复：请问父母第一次入境, 可以带些食物象笋干,梅干菜,黄花菜,野核桃吗? 谢谢!

Actually, they could bring whatever they want. If the US officer find them, they'll just throw them away, no penalty. This was the case when my parents arrived here last year.
This year, when they came, they still bring those kind of stuff like vegetable seeds etc, nobody checked them (this is very common), and they got them in here.
Don't be too cautious.