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The effects of Empoasca dolichi Paoli (Hemiptera: Cicadellidae) on the performance and yield of two cowpea cultivars

Published online by Cambridge University Press:  10 July 2009

I. A. Parh
I. A. Parh
Affiliation:
Department of Zoology, University of Jos, Jos, Nigeria
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Abstract

The effects of feeding by groups of 0, 15, 30, 45, 60, 75 or 90 adults of Empoasca dolichi Paoli per plant on the growth and yield of caged Prima and Ife Brown cowpea plants infested 14, 21 or 28 days after planting were studied in Ibadan, Nigeria. Caging had no significant adverse effects on yield. E. dolichi caused severe hopper-burn in plants infested 14 days after planting. The mean pre-flower-opening stage lasted 42–1, 38–0 and 39–0 days in Prima and 446, 407 and 423 days in Ife Brown plants infested 14, 21 and 28 days after planting, respectively, the first figure for each cultivar being significantly different from the other two. The mean yields were 23 3, 28 5 and 298 pods per plant for Prima, and 350, 48–1 and 437 for Ife Brown, respectively, the first figure for each cultivar being significantly lower than the other two. The reduction in seed yield in damaged plants infested 14 days after planting ranged from 287 to 413% for Prima and 272 to 56–9% for Ife Brown, the reductions being significantly correlated with scores for feeding damage by E. dolichi.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 73 , Issue 1 , March 1983 , pp. 25 - 32
Copyright
Copyright © Cambridge University Press 1983

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