Yellowing in Tobacco
The yellowing you are seeing in tobacco fields is nitrogen deficiency due to earlier rains and extreme heat limiting root volume and up take. With all the rain roots tend to be more shallow and will stress when the heat is turned on. Many of the tobacco producers put on extra nitrogen and if may or may not have helped in most cases it did. What a producer has to watch out for is that to much nitrogen can create a longer growing season with more money spent on curing and the chance of frost damaging the crop. With the excessive rain we are seeing target spot and blue mold and other diseases. Many of the bottom leaves are yellow and have lesions or spots. With these spots it makes the tobacco hard to cure and leaves stick together which is not acceptable.