[dx87]

According to Wikipedia, some countries use hydrogen cyanide as an ingredient in pesticide.

[cwkoss]

To be a bit more precise: myclobutanil degrades into HCN when heated to vaporization temperature

The process of extracting and concentrating THC can also extract and concentrate this pesticide.

Imidacloprid is another pesticide with harmful effects that has been found on cannabis, but seems to be toxic itself (rather than it's byproducts)

Source: https://www.planetnatural.com/marijuana-pesticides/

[otterley]

Pretty sure they meant "for a product for human consumption" :)