For which pesticides can 2-PAM be used as an antidote?

2-PAM, or Pralidoxime, is specifically used as an antidote for poisoning caused by organophosphate pesticides. Organophosphates inhibit the enzyme acetylcholinesterase, leading to an accumulation of acetylcholine, which can result in serious and potentially fatal symptoms related to the nervous system. 2-PAM works by reactivating cholinesterase that has been inhibited by organophosphates, effectively reversing the toxic effects and allowing the body to properly regulate nerve signals.

This ability to counteract the impact of organophosphates makes 2-PAM a critical tool in treating exposures to these substances. It is not effective for other classes of pesticides, such as carbamate insecticides, which also inhibit acetylcholinesterase but require different treatment approaches. Organic chlorine insecticides and growth regulator herbicides operate through different mechanisms and do not involve acetylcholinesterase inhibition, making them inapplicable for treatment with 2-PAM. Thus, the focus on organophosphates is what delineates the correct answer.