Complex sentence: Upon favorable moist and warm conditions, conidia (the primary inoculum) are released from lesions of an infected corn plant and carried to nearby plants via wind or splashing rain.
Split into simpler sentences: Upon favorable moist and warm conditions, the fungus will release conidia, its primary inoculum, to infect other plants. These conidia are released from lesions of an infected plant and carried to surrounding corn plants via wind or splashing rain.