- Location
- S E Glos
May not be cold enough then.
Septoria needs to be in the epidemic phase now to keep up with plant development, cold weather will check it (it's a very slow growing fungus anyway) and set it back. Upper parts of plant can emerge and function under no threat of infection. Happened in 1995 and (I think) 2001. 1995 was minus 3-5 deg C in early May though.
Septoria needs to be in the epidemic phase now to keep up with plant development, cold weather will check it (it's a very slow growing fungus anyway) and set it back. Upper parts of plant can emerge and function under no threat of infection. Happened in 1995 and (I think) 2001. 1995 was minus 3-5 deg C in early May though.