ProfessorPangloss
Amateur Kentuckian
I got the growers' guide from the University of Kentucky extension. They recommend ideally you're supposed to scout the crop and always be looking for signs of infestation, and right as it's about to get serious, you spray. From the manual: Treat if there are five or more hornworms (1 in or longer) per 50 plants and topping is at least 1 week away.
They recommend a whole bunch of brands, but the ones I see that are available to the public (as far as I know) are Dipel, Orthene, and Sevin. I can personally vouch for Sevin's ability to knock Japanese beetles dead right off a plant, but Sevin is murder on honeybees, so you gotta be cautious.
Edit: don't do the powder form of these chemicals. I'm an idiot.
They recommend a whole bunch of brands, but the ones I see that are available to the public (as far as I know) are Dipel, Orthene, and Sevin. I can personally vouch for Sevin's ability to knock Japanese beetles dead right off a plant, but Sevin is murder on honeybees, so you gotta be cautious.
Edit: don't do the powder form of these chemicals. I'm an idiot.
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