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Effect of harvest seasons on the incidence of seed-borne mycoflora of three Amaranthus cultivars

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Abstract

Fifteen fungal species were found to be associated with seeds of three cultivars ofAmaranthus cruentus L. There was a seasonal variability in the frequency of isolation, distribution and quantity of these seed-borne fungi among cultivars. The wetness, high temperature and air humidity that accompanied harvests of the first and second seasons greatly increased the number and amount of seed-borne fungi. Least number and mean percentage seed infection were recorded for NHAc100 while NHAc30 and NHAc33 carried highest percentage inoculum of these pathogens. The seed testa of all cultivars was found to harbour the highest number and amount of some of these pathogens also in the second season. These seed-borne fungi,Choanephora cucurbitarum, Rhizoctonia solani andPythium aphanidermatum were highly pathogenic on seedlings of NHAc33 and NHAc30. Five of these seed-borne mycoflora have not been recorded onAmaranthus in Nigeria.

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Correspondence to A. Adebanjo.

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Adebanjo, A., Ikotun, T. Effect of harvest seasons on the incidence of seed-borne mycoflora of three Amaranthus cultivars. Mycopathologia 128, 25–32 (1994). https://doi.org/10.1007/BF01104275

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Key words

  • Amaranthus
  • Harvest seasons
  • Mycoflora
  • Seed-borne