Disease Cycle
The disease is primarily spread through contaminated seed or farm equipment, although it may also be carried short distances by the wind. The fungal spores can then remain viable for several years, germinating when weather conditions become favorable for development. Once the spores germinate, they infest the wheat flowers and develop large masses of spores on the embryo end of the kernels (the entire kernel is not usually affected).
Read more about this topic: Karnal Bunt
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