Mineral oil for corn earworm

greenthumbnick(8b)May 30, 2008

I read that you should wait til corn is polinated before applying mineral oil to the ears. How do I know its polinated. I know it looks dry and brown when its ready for harvest but Im sure there's a way to tell when its polinated sooner than that.

Does mineral oil kill existing earworms or is it suppose to prevent them from entering the ears? Or both?

Nick

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Beeone(4 N. Wyo.)

Are you sure you want to use mineral oil? I wasn't aware that corn had problems with ear wax! I use Sevin shortly after bloom with excellent results.

    Bookmark   May 31, 2008 at 3:21AM
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wally_1936(8b)

They drown from the oil

    Bookmark   June 1, 2008 at 12:23AM
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Beeone(4 N. Wyo.)

Thanks. Never heard of that before.

If the oil coats the worm so it can't breathe, I would suspect it works on existing worms and wouldn't necessarily repel new arrivals, although they might detect the presence of the oil and stay away anyway.

I guess I would be concerned that once you got a high enough concentration of oil to suffocate the worms, you would also be suffocating and damaging the plant.

To tell when your corn is pollinating, watch the tassles. When they finish dropping their pollen, you are done with pollination and coming into corn ear worm season.

    Bookmark   June 1, 2008 at 2:38AM
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