Rhizoctonia causes a variety of symptoms but the most characteristic is reddish-brown spots that appear at the base of the seedling stem and on roots just below the soil line. These spots can enlarge into sunken lesions which may girdle the stem resulting in damping-off. Seedlings that survive the initial infection have a characteristic reddish band on the stem at or just below the soil line. These lesions will be brick-red in freshly pulled soybean plants. The disease can affect soybeans at any stage of development.
Fusarium wilt is most problematic when soybeans are under stress.
Stress can interfere with the normal activity of the plant's root system and therefore, will affect growth and potentially increase root diseases. Fusarium symptoms include stunting, overall poor growth, wilting and death. 1st trifoliate through to bud up to 25 cm up to 25 cm Top of Page Soybean Replant Worksheet Soybeans have incredible potential to compensate yield potential in thin stands. The following worksheet will help you decide if your final population warrants replanting. Graduate student competitions in crops and soils will be held on Monday afternoon, finishing with a hearty Mennonite-style meeting at the Elora Research Station.