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| I know nothing about corn fungicides, but having been involved in wine grapes I have sprayed a lot of fungicides. Sulfur and copper are both considered organic. As well as Stylet oil. From what I know there are 2 Stylet oils available. They are the same but one has been through the certification process, and the cheap one has not been.
If spraying sulfur it could be as often as ever 14 day. Since there was no price advantage for organic wine grapes when and were I was we were not organic. Historically funguses in grape build up resistance chemical fungicides, but not to the organics. So a typical application was mix of a chemical and organic.
Sulfur maybe hard to apply in the Midwest, as we wanted it under 70 degrees to apply. At warmer temperature leaf burn was a problem. I know I pushed the envelope on a number of occasions, and it was 75 to 80 after the last acre was done, and never saw leaf burn.
Kocide was a copper product we used, the label on it claimed 1 to 2 degrees of frost protection as well as the fungicide killing action. I am also not sure if it is organic. Did look and see it is registered on corn. | |
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Is there any worthwhile organic fungicide?
