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Beginner Vegetables: Corn Blight Control?

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Forum: Beginner VegetablesReplies: 2, Views: 21
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KathySEFL
Delray Beach, FL
(Zone 10a)

October 30, 2009
10:14 AM

Post #7223521

Hi, I am relatively new to Daves Garden, and have been posting on the self contained garden forum.

I started my first veggie garden in a long time. I am in South Florida. I planted "Bandit" sweet corn on September 29. I interplanted Kentucky Wonder pole beans October 4th when the corn was about 4 inches high. Perhaps I should have waited another week, for my beans are outgrowing my corn at this point.

I think my corn has corn blight, but am not positive. Some lower leaves are browning, and newer leaves have brown elongated spots.

Thinking I had an insect pest, I sprayed last week, one evening, with insecticidal soap. I still think I have a bug, something tiny but perhaps blight as well. It has been very warm and humid here--in the mid to high 70's at night, and near 90 F during the day.


Does anyone have a control, organic preferable, that they recommend? I have posted this on the organic gardening forum as well

I am including a picture of the corn leaf with symptoms when it first appeared last week.

Thumbnail by KathySEFL
Click the image for an enlarged view.

Farmerdill
Augusta, GA
(Zone 8a)


October 30, 2009
12:46 PM

Post #7223876

Sweet corn has a lot of problems in Florida, both insects and disease organisms which would freeze out in colder climates. http://pestdata.ncsu.edu/croptimelines/pdf/FLSweetCorn.pdf Souther corn blight is a good possibilty and while it can be controlled with fungicides, I don't which if any are organic approved. http://edis.ifas.ufl.edu/pg057 http://ipm.illinois.edu/diseases/series200/rpd202/index.html... http://www.cbwinfo.com/Biological/PlantPath/BM.html It would seem that Chlorothalonil available to homeowners as Ortho® Max™ Garden Disease Control is the best bet for home gardeners.
Serenade Garden Disease Control is a broad spectrum organic approved fungicide, but I don't know if it will work on corn blight or rust.
KathySEFL
Delray Beach, FL
(Zone 10a)

October 30, 2009
03:03 PM

Post #7224259

Thanks so much for the useful links, Farmer Dill. I will look for the Serenade locally! I did see it advertised online while I was doing an internet search for controls. I will keep the Ortho Max in mind as well.

Thanks Again
Kathy

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