CURRENT AFFAIRS

Detailed explanation-1: -Yellow rust life cycle. The pathogen that causes yellow rust - Puccinia striiformis - affects wheat, barley and triticale.

Detailed explanation-2: -Stripe (yellow) rust, caused by Puccinia striiformis f. sp. tritici (Pst), is a serious disease of wheat occurring in most wheat areas with cool and moist weather conditions during the growing season. The basidiomycete fungus is an obligate biotrophic parasite that is difficult to culture on artificial media.

Detailed explanation-3: -The first sign of stripe rust is the appearance of yellow streaks (pre-pustules), followed by small, bright yellow, elongated uredial pustules arranged in conspicuous rows on the leaves, leaf sheaths, glumes and awns (Figure 3). Mature pustules will break open and release yellow-orange masses of urediniospores.

Detailed explanation-4: -The rusts are a group of fungal diseases affecting the aerial parts of plants. Leaves are affected most commonly, but rust can also be found occasionally on stems and even flowers and fruit. The spore pustules produced by rusts vary in colour, according to the rust species and the type of spore that it is producing.

Detailed explanation-5: -Rust diseases are common fungal infections that affect a wide range of floricultural crops, including Carnation, Roses, Chrysanthemums, Hypericums, Fuchsia, Geraniums, Gladiolus, Lilium, Marigold, Poinsettia, Snapdragons, Statice and Viola (including pansy).