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Influence of headbugs (Eurystylus sp.) on sorghum grain mould in the Nigerian savanna

Published online by Cambridge University Press:  01 February 1999

P. S. MARLEY  and
A. M. MALGWI
P. S. MARLEY
Affiliation:
Department of Crop Protection, Institute for Agricultural Research, PMB 1044, Samaru, Zaria, Nigeria
A. M. MALGWI
Affiliation:
Department of Crop Protection, Institute for Agricultural Research, PMB 1044, Samaru, Zaria, Nigeria
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Abstract

The interaction between headbugs (Eurystylus sp.) and grain mould (GM) on sorghum was examined in field trials carried out at Samaru, Nigeria in the 1995 and 1996 wet seasons. The results obtained show that in all three sorghum cultivars tested, insect damage increased the number of fungal colonies associated with the grain. This resulted in lower germination, 1000-grain mass and yield in such treatments. Insect damage also altered the relative abundance of the common fungal flora species as, following insect damage, Fusarium moniliforme (≡Gibberella fujikuroi), Phoma sorghina and Curvularia lunata (≡Cochliobolus lunatus) were the most common fungi in decreasing order of frequency as against the normal order of P. sorghina, F. moniliforme followed by C. lunata. These results are the first clear evidence of interactions between headbugs and GM in Nigeria.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 132 , Issue 1 , February 1999 , pp. 71 - 75
Copyright
1999 Cambridge University Press

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