Sunflowers are well in flower with the later sown crops catching up in the sun and heat, currently 30 degrees plus during the day.
Should we spray a fungicide against sclerotinia and botrytis?
Many are recommending that we do; my feeling is that it is unrealistic to expect a few grams of active to penetrate and translocate through such a large plant to do any good.
Also the average yield for nine of the top producers in Ukraine was 2.3MT/HA over the last two years with a range from 2.1 to 2.6MT/HA.
I just can’t see applying $60 to $70 worth of chemicals at this stage will be economic.
I would appreciate any thoughts from those who have been growing SF for longer that I have, drop me a line at Agronomy.ukraine@yahoo.co.uk