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Can you spray corn with cayenne pepper/garlic/onion spray for aphids?

 
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Hundreds of blueish aphids on our top corn tassels. We want to use a cayenne pepper spray that we know works for aphids (worked great on our apple trees) however it totally killed our grapevine buds and leaves (whoops!!!) does anybody use these ingredients on corn--OK or NO? We don't want our corn to be a learning experience like the grapevines! lol!
SO THE QUESTION IS:
Can you spray corn with cayenne pepper/garlic/onion/bio soap spray for aphids?
Or other kitchen remedies that are great for killing blue corn aphids? Anybody got a safe one?
(I've heard neem oil, etc., but I'm looking for something I've got on hand.)
Thanks a bunch!!
 
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Seems to be a boom of this species of aphid this year:  https://www.ag.ndsu.edu/cpr/entomology/corn-aphids-07-27-17

Will be checking our sweet corn and popcorn tonight to see if they are in the garden.  I would *think* you would be safe with that spray combination on corn, but you may wish to test it on just a few tassels or upper leaves.

https://en.wikipedia.org/wiki/Rhopalosiphum_maidis
 
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My thought on testing it was somewhat different than John's.  I would test it on one plant and give it a good overall spraying and see what happens.  Maybe trying each method would be best?
 
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We heard that we should spray a liquid of ashes, chilli pepper and garlic. It didn't really help at all, but did make a mess. I think what helps more with aphids in our greenhouses in the springtime is to improve ventilation and to reduce fertilisation during the winter. And some years you're just gonna get aphids no matter what you do (short of poisons). I don't mind squishing a few, but when the infestation is too big I pull the plants. Phooey! Having a wide variety of plants helps temper the emotional strain of it. Some are more susceptible than others.
 
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