Wheat Rust

1. PUCCINIA
PRESENTED BY:
 DIBYA THAPA MAGAR (17)
 DINESH GHIMIRE (18)
 GAJENDRA BHATTA (19)

2.  SYSTEMATIC POSITION:
 Kingdom: Mycota
Division: Eumycota
Subdivision: Basidiomycotina
Class: Teliomycetes
Order: Uredinales
Family: Pucciniaceae
Genus: Puccinia
 Species : graminis

3. INTRODUCTION:
 The genus includes about 5000 species.
 Some species are autoecious(single host) whereas some are
heteroecious.
 Mainly 3 species are found to be devastating wheat and
other cereals field through rust:
 Puccinia graminis – Stem rust in wheat
 P. recondita –Brown leaf rust
 P. striformis - Yellow stripe rust
 Rust are polymorphic, it means several forms of spores
exist in its life cycle. (Fig. 1)

4. Fig.1. Various stages of Puccinia

5. SYMPTOMS:
 Black stem rust:
 Appear as elliptical blisters/pustules called uredia(Fig.2)
 Infected parts burst out exposing mass of brick-red colored
urediospores.(Fig.3)
 Later on, the blisters turn black as fungus produces
teliospores.
 Uredia are transformed into black telia.

6. FIG.2. STEM RUST

7. FIG.3. T.S. of affected leaf of wheat showing uredospores

8.  Brown leaf rust:
 First seen on upper
leaves.
 Yellow stripe rust:
 Appear mainly on
leaves than leaf sheath
and stem.
 In Barberry, the
symptoms appear as
yellowish to orange
colored spots on
leaves.(Fig.4.)

9. Fig.4. Leaf rust in barberries sps.

10. THANK YOU