These photographs (two different fields) show the effect of soil texture and fertility in crop growth and then on crop appearance along with individual varieties inherent ability to deal with moisture stress and the affects the canopy then has on the crops photosynthetic capability.
That means the winter wheat’s have a chance to increase in yield although to be more accurate its not really moisture but years which have seen highest average yields come in a “bright” but not too hot a June, so what else is going on?
The crop needs sunlight to photosynthesis, create carbohydrate and then push this into the grains.
Sunlight capture is down to photosynthetic area. We have lost some of this already. Poor leaf expansion (fertiliser uptake in May) and loss of leaf area down to disease.
It is now possible that further loss of leaf area will occur where fungicide programmes have not been appropriate. Consequently the IDEA of a T4 fungicide is proposed by many within the industry.
As a rule of thumb T4 fungicides need to be applied before 1st July or maybe 7th at a stretch and where the crop has not completed grain fill if the T4 application is to be economically justified.
Skyfall under moisture stress and not under stress. An inappropriate fungicide programme and a more appropriate one in a crop not under moisture stress.