11. The pathogen persists as oospores in the soil. 12. The oospores germinate to form usually one sporangia. 13. The storage material is starch, except in the oospore , where oil also occurs. 14. The zygote produced is named an oospore . 15. It is also possible for oospores and mycelium to overwinter in the seeds of maize. 16. Once infection season comes to an end, sexual reproduction occurs to form an oospore . 17. The oospores are then left to overwinter in the dead plant s debris and the soil. 18. Oospores are double walled and uninucleate during dormancy, but become multinucleate in preparation for germination.19. Chlamydospores are larger than oospores in size, and are only formed under certain environmental triggers. 20. During the winter, oospores , which are sexual resting spores, survive in the soil.
