Complex sentence: By late spring, conidia (asexual spores) are produced by "Cercospora zeae-maydis" in the debris through wind dispersal or rain the conidia are disseminated and eventually infect new corn crop.
Split into simpler sentences: By late spring, conidia (asexual spores) are produced by "Cercospora zeae-maydis" in the debris through wind dispersal or rain. The conidia are disseminated and eventually infect new corn crop.