Bean Binoculars Incident

Manganese Deficiency

Issue: Abiotic Factor

Scouted in Suffolk city, VA on June 21st, 2024

Manganese Deficiency

Details:

Soybeans at the R2 (full flower) growth stage in Suffolk County, Virginia are displaying inter-veinal chlorosis on the younger leaves. Approximately 25-50% of the site is displaying these symptoms of a manganese deficiency.

Conclusion:

Growers who observe these symptoms should confirm the manganese deficiency with a tissue sample to rule out similar problems that may cause similar symptoms (such as nematodes). If the manganese deficiency is confirmed, growers can apply manganese as a foliar spray and monitor the field to confirm if any additional applications are needed. Please check nutrient management guidelines in your state for more information. You can find more information about manganese deficiency in soybeans in Virginia in this article from Virginia Cooperative Extension. 

Contributor:

Carrie Ortel
Virginia Tech

Resources:

Mn Deficiency | Virginia Cooperative Extension

Photo looking down a row of R2 soybeans displaying manganese deficiency. Photo looking down at a R2 soybean plant displaying signs of a Mn deficiency. The interveinal chlorosis is very evident and bright, with the veins of the soybean a darker green than in between the veins. Side photo of a R2 soybean plant displaying signs of a Mn deficiency. The interveinal chlorosis is very evident and bright, with the veins of the soybean a darker green than in between the veins.