BLACK STEM RUST OF WHEAT
BOTANY: SEM-II, PAPER-C3T: MYCOLOGY & PHYTOPATHOLOGY UNIT-9: PHYTOPATHOLOGY.
PROF. NANDITA BHAKAT
Assistant professor Department of Botany
Narajole Raj College
OCCURRENCE AND IMPORTANCE
1)Black stem rust disease appears on the wheat crop.
2)This disease also appears in an epiphytotic from many country. –In northern India the disease dose not appear before March. In southern India, the disease, How ever many appear as early as the last week of November.
3)The disease has been extensively studied in Europe,
USA and other country, where it often causes
severe losses in yield.
The causal organism (pathogen)
Pathogen : Puccinia graminis tritici.
Host : Triticum aestivum.
BOTANY: SEM-II, PAPER-C3T: MYCOLOGY & PHYTOPATHOLOGY UNIT-9: PHYTOPATHOLOGY.
Symptom of the disease
Symptom of wheat plant :
The symptoms first
appearance on the stem, leaf
sheaths.
In the early part of season the symptoms are every common on appear glumes and eve the beard.
ii)
BOTANY: SEM-II, PAPER-C3T: MYCOLOGY & PHYTOPATHOLOGY UNIT-9: PHYTOPATHOLOGY.
Irregularly exposing a powdery mass of reddish or rust colored spore called uredospores.
iii)
Telial from oblong to linear lesions and are more frequent on leaf
sheaths than on stem.
BOTANY: SEM-II, PAPER-C3T: MYCOLOGY & PHYTOPATHOLOGY UNIT-9: PHYTOPATHOLOGY.
In severe attacks, plants in
general look sickly and fail to
from normal ears: the grains
become shriveled and lighter in
weight.
BOTANY: SEM-II, PAPER-C3T: MYCOLOGY & PHYTOPATHOLOGY UNIT-9: PHYTOPATHOLOGY.
Disease control
i) Some varieties are very useful to prevent most of the races of stem rust pathogen like – s227, s307, s308, etc.
ii) 4-5 times application of zinc sulphate and nabam.
iii) Avoided the Nitrogenous manures.
iv) Proper drainage in the wheat field be
maintained, as the dampness.
THANK YOU
BOTANY: SEM-II, PAPER-C3T: MYCOLOGY & PHYTOPATHOLOGY UNIT-9: PHYTOPATHOLOGY.
