Disease Cycle
M. nivale begins by oversummering (surviving the summer) in thatch or soil as haploid mycelium or spores. When cool, wet weather arrives in the fall or winter the mycelium grows from thatch or soil and infects leaves. These environmental conditions also favor the development of asexual spores called conidia on conidiophores. These conidia infect leaf sheaths and blades near the soil. Wind and surface water will help aid in the spread of this disease as it will allow for the spores to contact near by healthy plant. The disease becomes very severe if allowed to spread from the leaf blades to the crown of the plant. This usually only happens under extreme circumstances, particularly if snowfall covers unfrozen ground.
Read more about this topic: Fusarium Patch
Famous quotes containing the words disease and/or cycle:
“Anti-Semitism is a horrible disease from which nobody is immune, and it has a kind of evil fascination that makes an enlightened person draw near the source of infection, supposedly in a scientific spirit, but really to sniff the vapors and dally with the possibility.”
—Mary McCarthy (1912–1989)
“The cycle of the machine is now coming to an end. Man has learned much in the hard discipline and the shrewd, unflinching grasp of practical possibilities that the machine has provided in the last three centuries: but we can no more continue to live in the world of the machine than we could live successfully on the barren surface of the moon.”
—Lewis Mumford (1895–1990)