Zea mays ssp. Necrosis begins at the leaf tip and moves rapidly down each leaf to its full length in 24 hours.
Necrosis is accompanied by drops of dark brown exudate on leaf tip and on underside of leaf blade.
Lethal, but under cool moist conditions and favorable genetic background some mutants survive to produce plants with many longitudinal necrotic streaks on leaf blade. References Contents Reference Genelist Neuffer, MG and Beckett, JB. 1987.