TNAU Agritech Portal
Home | About Us | Success Stories | Farmers Association | Farmers' Innovation | Publications | Contact
Agricultural crops :: Cereals :: Maize

Common Rust: Puccinia sorghi  

Symptoms:    

  • Minute flecks are appeared on both sides of leaves.
  • Circular to elongate cinnamon brown, powdery, erumpent pustules on both leaf surfaces
  • As the crop matures brownish black pustules develop
  • In severe cases infection spreads to sheath and other parts

Pathogen:

  • Puccinia sorghi is a heteroceious rust.
  • Uredospores single celled, echinulate, yellowish brown, pedicellate, elliptical
  • Teliospores reddish or brown in colour, two celled, rounded at the apex
  • Alternate hosts - Oxalis europea, O. corniculata and O. stricta
  • Basidiospores infect Oxalis corniculata, where pycnial and aecial stages occur
  • Aeciospores carried by wind and infect maize

Favourable condition:

  • Cool, warm and moist weather (15 - 25o C)

Survival and Mode of Spread:

  • Primary spread through alternate hosts
  • Secondary spread through wind borne uredospores

Management:

  • Remove the alternate hosts .
  • Collect the remains of the crop and destroy by burning or burying
  • Foliar spray of kresoxim-methyl 44.3% SC @ 1 ml/l or tebuconazole @ 1ml/l orchlorothalonil or mancozeb 2 ml/l at 35 and 50 DAS

Brown pustules on leaf

 

Home | About Us | Success Stories | Farmers Association | Publications | Disclaimer | Contact Us

© TNAU 2008-2024 All Rights Reserved.