Insect damage also interferes with the carbohydrate movement from the stalk to the ear. This stress also lowers the plant's resistance to stalk rotting fungi. Hybrids resistant to European corn borer usually have healthier stalks and higher yields. Weeds compete directly for light, water and nutrients thus directly stressing the plants and predisposing them to stalk rot. They also often serve as alternative hosts for several stalk-rotting fungi.
All hybrids are susceptible to stalk rot under some conditions.
Hybrids with better standability due to a thicker rind are often perceived as being more resistant to stalk rot. However, their ability to stand longer is a management tool. Weather, directly and indirectly, plays a huge part in the success or failure of crops. While we cannot control weather, we can control the management practices we choose to combat various weather situations.