What is the map of corn? What caused it?

There are more than 20 kinds of molds that cause ear rot of corn, which will attach to the diseased parts of corn, such as seeds, stubbles, stalks, ear shafts and so on. After winter, in the second year, under rainy and humid environmental conditions, the ascospores of pathogenic bacteria will grow and mature rapidly, fly away with the wind and land on the filaments of corn, causing diseases, especially in summer, when the temperature is above 25℃ and the humidity reaches 80. If the harvested corn is not sufficiently dried by precipitation and has high water content, and the warehouse is poorly sealed and the temperature in the warehouse is high during storage, these conditions are more conducive to the spread of various molds, causing corn kernels to rot or mold.

Please refer to