We like growers to plant their corn early, however, we want them to wait until the ground is ready and soil temperatures are 50 degrees and above. When you have a lot of area to cover, you have to plant when the weather will let you. But this can create opportunities for disease organisms and insects to attack the newly emerging plants. This year after planting, it turned cold and the seedling blights had their chance to invade. There have been several reports of seedling root-rot in corn fields. Some of the causes for seedling blights are as follows:
• Seedling diseases are favored by wet and cool soil conditions (50-55 F) after planting. Corn planted early or in no-till ground is more susceptible to these diseases. Recent cool and wet periods were ideal for the pathogens that cause seedling blights.
• The disease organisms that infect corn seedlings are species of Pythium, Fusarium and Rhizoctonia.… Continue readingRead More »