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African Crop Science Journal
African Crop Science Society
ISSN: 1021-9730
EISSN: 2072-6589
Vol. 9, No. 4, 2001, pp. 693-697
Bioline Code: cs01087
Full paper language: English
Document type: Short Communication
Document available free of charge

African Crop Science Journal, Vol. 9, No. 4, 2001, pp. 693-697

 en Fungi associated with maize seed discolouration and abnormalities in south western Nigeria
Owolade, B.F.; Fawole, B. & Osikanlu, Y.O.K.

Abstract

Three seed samples of maize showing different forms of discouloration and abnormalities were screened for associated fungi. Fusarium moniliforme check for this species in other resources and Aspergillus flavus check for this species in other resources were isolated from all the categories of seed tested. The percentage incidence of F. moniliforme was significantly higher on seeds which showed white streaks, purple/pink discolouration, discoloured germ end and wrinkling than that of any other fungus. Cephalosporium acremonium check for this species in other resources and Nigrospora oryzae check for this species in other resources were also associated with purple/pink discolouration while Dreschslera maydis check for this species in other resources , Fusarium semitectum check for this species in other resources , Curvuluaria lunata check for this species in other resources and Colletotrichum graminicola check for this species in other resources were observed on seeds with brown spots. Botryodiplodia theobromae check for this species in other resources was more predominant on blackened seeds. Cephalosporium acremonium, B. theobromae, D. maydis and F. moniliforme were mainly associated with seeds with discoloured germ ends while wrinkled seeds were observed to harbour F. moniliforme, D. maydis and C. graminicola.

Keywords
Discolouration; incidence; maize; seed-borne fungi; wrinkled seeds

 
 fr
Owolade, B.F.; Fawole, B. & Osikanlu, Y.O.K.

Résumé

Trois échantillond de graines de maïs montrant differentes formes de décoloration et d'anomalies ont été évaluées pour les champignons associés. Fusarium moniliforme check for this species in other resources and Aspergillus flavus check for this species in other resources ont été isolés de toutes les catégories de graines testées. Le pourcentage d'incidence de Fusarium moniliforme était significativement plus élevé sur les graines qui ont montré des raies blanches, une décoloration purpre/rose, un bord du germe décoloré et une entorse plus que d'autres champignons. Cephalosporium acermonium check for this species in other resources et Nigrospora oryzae check for this species in other resources ont été aussi associés avec une décoloration purpre/rose alors que Dreschslera maydis check for this species in other resources , Fusarium semitectum check for this species in other resources , et Collecttrichum graminicola check for this species in other resources étaient sur les graines avec des tâches brunes. Botryodiplodia theobromae check for this species in other resources était plus dominant sur des graines noircies. Cephalosporium acremonium, B. theobromae, D.maydis et F. moniliforme étaient principalement associes avec les graines ayant des fins des germes decolores alors que les graines tordues etaient observees chez F. moniliforme, D. maydis et C. graminicola.

Mots Clés
Décoloration; incidence; maïs; graine issue des champignons; graines tordues

 
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