Brown spots

[dvencius78]

hello I grow tobacco for my own needs. I'm not sure what it is, I tend to think it's either a lack of phosphorus or brown spot, it is on many plants. I sprayed urea with magnesium sulfate, maybe that's why? I would appreciate your help.

 

[deluxestogie]

Welcome to the forum. Feel free to introduce yourself in the Introduce Yourself forum.

My experience with brown spot (a fungal infection) is many fewer spots, and much larger spots. The pattern suggests an environmental cause. Perhaps the foliar urea spray, or perhaps "weather fleck", which is ozone damage to the leaf. Air quality over Lithuania today looks good. But air quality over Easter Europe is presently rather bad. Since weather fleck develops over an extended time period, just simple shifts in wind patterns could have brought the poor air quality over Lithuania. I would do nothing about the leaf now, and just watch. Brown spot will cause an increase in the diameter of the spots, with concentric circles, while a weather fleck pattern will not likely change with time. If the cause is the foliar urea spray, I would also expect no change with time.

Bob

 

[Red Lime]

hello I grow tobacco for my own needs. I'm not sure what it is, I tend to think it's either a lack of phosphorus or brown spot, View attachment 42921it is on many plants. I sprayed urea with magnesium sulfate, maybe that's why? I would appreciate your help.

I also experimented with 2% urea solution, 2 Times! The second i did it at lunchtime, for reasons of time, the sun burned some leaves, that could bei an explanation.