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Disease of Wheat: Black Rust and Loose Smut

Black rust of wheat

 

Host

  • Triticum aestivum

Pathogen

  • Puccinia graminis-tritici

Symptoms

  • Rust infection is observed in leaves, leaf sheaths, stems, floral structures in the form of rust pustules.
  • Reddish brown pustules appear during the formation of urediniospore.
  • Black pustules appear during the formation of teliospore.
  • On maturity, the teliospore bursts out and then masses of dark brown teliospores are seen on the stem, so called black rust.
  • In case of severe infection, the diseased plant is stunted.
  • Small spikes and shrivelled grains can be produced or no grains at all.

Control measures

  • Resistant variety should be used.
  • Burning of infected crop varieties.
  • Proper sanitation.
  • Spraying fungicide.

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Loose smut of wheat

Host

  • Triticum aestivum

Pathogen

  • Ustilago hordei

Symptoms

  • Loose smut manifests itself only when the ears emerge from the leaf.
  • All spikelets are affected and transformed into a mass of black powder spores.
  • Each smutted spikelet is covered by a thin silvery membrane.
  • The powdery mass of spores is blown off by wind, leaving behind only the central rachis.
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About Abulais Shomrat

Currently in 4th year (Hons) in the Department of Botany, University of Dhaka. Planned to have multiple careers one by one but promised to be with 'Plantlet' as long as it's primary stage remains unfinished. Email: abulaisshomrat@gmail.com. Minimum monthly resolution - Publish (1), Revise (3), Share (5)

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