Soybean Rust in the U.S.

Soybean rust is a serious disease causing crop losses throughout the world. It is caused by two fungal species, Phakopsora pachyrhizi and Phakopsora meibomiae. The USDA says yield losses have been reported from 10-80% in locations that have had outbreaks.

There are a large number of legume hosts that can harbor soybean rust. Soybeans are the largest crop affected... some other common hosts are kudzu, yellow sweet clover, vetch, medic, lupine, green and kidney bean, lima and butter bean, and cowpea or backeyed pea.

Soybean rust forms tan or reddish brown lesions on leaves, consisting of small pustules with masses of tan colored spores on the surface or reddish brown necrotic areas surrounding the pustules.

The most important element in managing soybean rust is staying ahead of the disease with well-timed, well-chosen preventive* fungicide applications. Soybean rust is so virulent that once the disease is established - especially in the mid- and upper-canopy - it can be extremely difficult to manage with a curative approach. (*Preventive is defined as 0-<2% incidence of rust in lower canopy; 0% in mid or upper canopy. A preventive application generally should be made at R1/R2.)


Soybean Rust Info & Observations From The USDA Website

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Fungicide Application With An A1 Mist Blower

Directly spray legume hosts and crops using 1/10th the water and less fungicide. The smaller mist droplets cover more surface area of the leaf.

Mist Spraying Versus Hydraulic or Dilute Spraying

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Other Mist Blower Uses

Spray your crops directly and spray roadside ditches, waterways, fencerows, field perimeters and hard to reach areas using 1/10th the water and less chemical!