General
Fungicide
In drought conditions does it pay to apply fungicide?
1
5
I did not see any real ROI on fungicide last year during a mild drought with the exception of maybe one variety on corn on corn ground. Average year I see a good yield increase on older numbers without the disease packages of the newer numbers. Beans more than paid off on fungicide last year though.
This is quoted from the K-State Research & Extension book Soybean Production Handbook....."The strobilurin group of fungicides has certain growth-promoting effects and has been vigorously marketed for use even in the absence of disease."
I apply fungicide to my corn and soybeans every year.
1
(edited)
Part of how an Azoxystrobin fungicide works is that it constricts the stoma on the leaf surface. This keeps the opening small enough that some fungal spores can't pass through to enter and infect the leaf. When the weather gets hot and dry, this stomatal constriction can help keep excessive water from transpiring out of the plant. And that will help the plant regulate limited water supplies during...
More1
it’s been our experience we only apply fungicides when the disease is prevalent and getting close to the ear leaf unless the corn isn’t going to make at all. Only time we stray from that is if we are spraying for something else early and can add the fungicide cheap enough on varieties that are prone to the disease. We have had grey leaf spot come on and untreated it destroyed plant health and th...
More1
following
1