2023年7月18日 · Nutrient deficiency: yellow soybean leaves can be caused by a nutrient deficiency, most notably nitrogen (N), iron (Fe), potassium (K), or manganese (Mn). Disease: premature yellowing can be caused by several common soybean diseases. Some of these diseases include sudden death syndrome (SDS), brown …

2022年2月10日 · Yellowing soybean leaves can be caused by several factors, though most often the first suspect is plant pathogens. Below we provide several factors that may cause soybean plants to yellow at this time in the growing season.

2014年8月19日 · There are six things that could cause the yellowing of soybeans, according to Anthony Bly and Connie Strunk, SDSU Extension field specialists. 1. Nitrogen deficiency -- Lower leaves usually lighter green or chlorotic (yellowing) with upper leaves darker green. Dig roots and check for nodulation.

2021年7月15日 · Brown spots may coalesce and infected leaves may turn yellow, creating leaves that appear golden with brown spots or patches (Figure 2, middle image). Symptoms are first found on the lower canopy and appear to work their way up the plant (Figure 2, right image). The disease is favored by warm and wet weather.

2020年8月20日 · There are several factors that can cause soybean leaves to turn yellow and drop. Diseases such as sudden death syndrome (SDS) and brown stem rot (BSR) are often noticeable later in the season when the leaves of the soybean plants begin showing symptoms of chlorotic or yellow leaf tissue leading to interveinal necrosis (dead tissue between veins).

2020年9月8日 · Soybean fields beginning to turn color are an indication that harvest is fast approaching, yet yellowing or leaf senescence can be caused by a variety of agronomic issues in addition to being a natural maturation process. Let’s explore what causes soybean leaf senescence and how to identify some of the causes of premature leaf senescence.

2021年7月27日 · SCN at high population density in the field can cause soybean plants to be stunted and yellow. The top leaves tend to be affected more than older leaves. Plants likely to be infected are those in low areas, at field entrances and …

2022年2月10日 · Some of the soybeans that were planted early or are early maturing varietes are starting to show color change. Color change around this time of the year indicates natural senescence where leaves progressively turn yellow and eventually drop off.

2020年7月10日 · Soybean plants can go through a period when their leaves are a light-green color before the nodules supply adequate N and a dark-green color returns. If proper nodulation, sufficient nutrients, and moisture are present, soybean can recover from this yellow phase at a fairly rapid pace as the season progresses (Figure 1).

The whole plant i.e. stems, leaves, and pods are hairy. Pods extend from 1-4 inches long in clusters of three to five. Each pod contains 2-5 seeds. Flowers are small white or purple. Soybean seed color ranges from black to grey, brown, green, yellow, white, and striped.