After a frost, or hail event, the dead tissue is not able to resurrect itself and is eventually sloughed off as the plant continues to grow. Thus a common question is how do I determine corn growth stage when I can no longer count leaves?
The weather took a turn to the cold side over the last week. Across Nebraska, lows at or below 32°F were recorded. Clear conditions coupled with these temperatures favor frost formation especially in low lying areas. So, what does this mean for our crops?
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.
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.
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.