Ah yes, because insects have nothing to do with leaves... And glyphosate is the only chemical in it. Wait, neither of those are actually true, are they? Let's

Ah yes, because insects have nothing to do with leaves... And glyphosate is the only chemical in it. Wait, neither of those are actually true, are they? Let's have a goo at the top three search results for "round up effect on insects"... > "The chemical compound glyphosate, the world's most widely used herbicide, can weaken the immune systems of insects, suggests a study from researchers at the Johns Hopkins Bloomberg School of Public Health" > "The active ingredient in Roundup, glyphosate, does not affect insects in the same way it impacts plants, but it does kill insects, either directly -- as in the case of a small number of honeybees in Monsanto's research -- or as a consequence of killing weeds." > "Glyphosate—the most widely used herbicide globally—inhibits melanin production, which could have wide-ranging implications in the health of many organisms, including insects. ... Glyphosate also increased the burden of the malaria-causing parasite Plasmodium falciparum in A" This doesn't seem like such an "unlikely" candidate to be playing a role to me.