release more zoospores. This process can happen relatively quickly and can act as an important source of secondary inoculum within a field.

Sexual stage

This stage follows a similar pattern to the asexual stage, but with a few exceptions. It is hypothesized that two zoospores fuse together to form a dikaryotic zoospore (with two separate haploid nuclei, n+n) and then infect the roots. Once the infection occurs, the dikaryotic zoospore develops into a binucleate

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