Under these conditions the shadow mask (13) is covered with a layer of Fe3O4, also referred to as 'black rust'.

This thing has immense potential for social and human destruction.

It has been suggested that the mildew mentioned in the Bible is black stem rust (Puccinia graminis).​—1Ki 8:37.

The Digalu (TIFTTF) race of stem rust continues to devastate wheats in Ethiopia, while the most well-known race of stem rust - the highly potent Ug99 - is now present in 13 countries.

The Digalu (TIFTTF) race of stem rust continues to devastate wheats in Ethiopia, while the most well-known race of stem rust – the highly potent Ug99 – is now present in 13 countries.

The Digalu (TIFTTF) race of stem rust continues to devastate wheats in Ethiopia, while the most well-known race of stem rust - the highly potent Ug99 - is now present in 13 countries.

The Digalu (TIFTTF) race of stem rust continues to devastate wheats in Ethiopia, while the most well-known race of stem rust – the highly potent Ug99 – is now present in 13 countries.

Tan markings vary in shade from creamy beige to dark rust, with no preference.

48:15: "Does stem rust in oats affect seed health?

The wheat stem rust (Puccinia graminis), also known as wheat black rust, is capable of causing severe losses and can destroy entire wheat fields.

Little Gem magnolias may become infected with blight, scab, black mildew and leaf spot, particularly if conditions that favor the formation of these diseases are present.

  The black rust can be easily formed by applying an acid solution to the molding surface and heat-treating the resulting molding surface.

The most common control method for stem rust, caused by Puccinia graminis, is the use of resistant cultivars.

These four mutations of Ug99 have acquired the ability to defeat two of the most important stem rust-resistant genes.

In the 1950s, the last major outbreak destroyed 40% of the spring wheat crop in North America.