Earlier this week south-central and central Nebraska were hit by heavy rains leading to flooding. Now farmers are asking: How long will the crop survive in standing water and what does this mean for the rest of the growing season?
Injury to germinating and seedling soybean from flooding depends on several factors, including soybean growth stage, flood duration, and air and soil temperature and varies the varieties. Pythium and Phytophthora are two diseases to scout for after flooding.
The new “Resistance Management Webinar Series” starting this January will feature live presentations from guest speakers on current resistance issues and research. Continuing education credits will be available for certified crop advisers.
Soybean plants are generally able to withstand a fair amount of flooding in the short term; however, diseases favored by wet conditions may become a problem for the rest of the season. Research shows the length of time the soil is wet and the type of soil will affect plant injury and survival.
Ponding or flooding of fields affects corn differently at different stages, depending on duration of flooding and other factors. Growers should assess the potential for nitrogen loss and increase scouting for corn disease in these fields.
October has gotten off to a wet start in most of the state and particularly in northeast Nebraska where some mature soybean fields are now flooded. Considering potential impact on yield and ability to harvest these fields will be critical in the next few weeks.