Yellow or strip rust of wheat

  C/O: puccinia striformis f.sp. tritici

Symptom:

• Mainly occur on leaves than the leaf sheaths and stem.
• Yellow-orange color , Individual pustules are small and circular but develop into yellow stripes on upper leaf surfaces, leaf sheaths and awns and inside glumes. It can be seen from a distance in patches known as ‘hotspots
• Uredospores severely attack leaf lamina.
• Uredosori: small, do not usually run together, brust late and with little fringes of the epidermis, always arranged in long stripes with yellow color.
• Telia: form later in the season, dark black in color, do not brust through epidermis.

Etiology:

Urediospore: nearly round, binucleate and unicellular.

Favorable condition:

• high relative humidity
• average temperature of 15-20 degree Celsius

Survive and spread:

• Survive : teliospore as resting spore.
• Spread: urediospore as a infective stage of spore and dissemination by wind.

Disease cycle:

• Polycyclic disease

Management:

• resistant varieties like Lerma Rojo, Safed Lerma, Sonalika and Choti Lerma
• Spray plantavax @0.1%