Black Rust


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Related to Black Rust: white rust, black iron oxide
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Black Rust

 

a plant disease caused by various fungi, both saprophytes and hemiparasites. It affects fruit and berry crops (including citrus, grape, mulberry), cereal grains, hops, house-plants, hothouse plants, and certain forest trees. It occurs mainly in subtropical and tropical climates. Black and dark brown spots and films (mycelia and spore sacs of fungi) appear on affected plants, decreasing photosynthetic activity and obstructing access of air to the tissues. Black rust is especially damaging to spikes and caryopses of cereal grains, lowering the yield and quality of wheat, rye, and millet grains. Control measures consist mainly in destroying aphids and scale insects, upon whose discharges the causative agents feed.

REFERENCES

See references under CERCOSPORIOSIS.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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References in periodicals archive ?
UG-99, a dangerous kind of Black Rust, has already reached Iran from Yemen and there are apprehensions that it might reach Pakistan.
Food and Agriculture Organization (FAO) recognized that the strain (ug99) which causes the disease of the Black Rust of Wheat Stem, forms a major threat to the cultivation of wheat and now it is widespread in all parts of East Africa, Yemen, the Sudan, and Iran, and it is expected to spread towards North Africa, the Middle East and Asia.
Henderson], black rust (caused by Puccinia graminis Pers.