Question

What is the causative agent of the black stem rust?

Answer 1

Black Stem Rust:

1. Puccinia graminis tritici is the causative agent of Black stem rust.
2. Its genus has around 700 species that are known to cause rust infections in a variety of plants, including oats, wheat, barley, and others.
3. Rust is named for the reddish-brown color of spores, which are most commonly found on the surface of the host's stems and leaves.
4. P. graminis is a heteroecious species that requires two hosts, barberry and wheat, to complete its life cycle.
5. The life cycle of P. graminis is divided into five stages based on spore features, and during the teleuto phase, the teliospore develops black to dark brown pustules on the surface of wheat leaves and stems, causing 'black stem rust of wheat.'