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Yellow Rust

Topics Covered: Major crops cropping patterns in various parts of the country.

Yellow Rust

What to study?

For Prelims and Mains: What is Yellow Rust, how it occurs, spread, impact and prevention?

Context: Yellow Rust was recently detected in wheat crops in parts of Punjab and Haryana.

What is Yellow Rust?

It is a disease that appears as yellow stripes of powder or dust on leaves and leaf sheaths of the wheat crop.

How it occurs?

This occurs when the rust colonies in the leaves drain the carbohydrates from the plant and reduce the green leaf area.

Rain, dew and fog favour the disease’s development.

Spread:

The disease can spread rapidly under congenial conditions and affects crop development, and eventually the yield.

Yield due to the disease can affected by between 5 and 30 per cent.

Where else is it observed in India?

In India, it is a major disease in the Northern Hill Zone and the North-Western Plain Zone and spreads easily during the onset of cool weather and when wind conditions are favourable.

Disease management:

Breeding resistant varieties is the most cost-effective method to control this rust.

These resistance genes, however, have become ineffective due to the acquisition of virulence to that particular resistance gene rendering the variety susceptible.

Sources: the Hindu.