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Journal of Applied Sciences
  Year: 2006 | Volume: 6 | Issue: 7 | Page No.: 1621-1624
DOI: 10.3923/jas.2006.1621.1624
 
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Screening of Cowpeas for Resistance to the Flower Bud Thrips, Megalurothrips sjostedti Trybom (Thysanoptera: Thripidae)

Mumuni Abudulai, A.B. Salifu and Mohammed Haruna

Abstract:
Seventeen cowpea cultivars were screened for resistance to the flower bud thrips, Megalurothrips sjostedti Trybom in field trials during 2003 and 2004. In 2003, the results showed that ITH 98-20 and TVu 1509 (resistant control) supported significantly (p<0.05) lower thrips populations than Vita 7 (susceptible control) and most of the cultivars except ITH 98-49 and Sanzi. Significantly lower thrips damage ratings were recorded for 11 cultivars including TVu 1509 and Sanzi than Vita 7. Sanzi and ITH 98-47 also had significantly lower yield losses due to thrips compared with Vita 7, the susceptible control. In 2004, no significant differences in thrips populations were detected among the cultivars. However, thrips damage ratings were significantly lower in 5 cultivars including Sanzi and TVu 1509 than Vita 7. Significantly lower yield losses also were recorded for 8 cultivars including Sanzi than Vita 7, the susceptible control. There were positive, but nonsignificant, correlations between thrips populations and damage ratings and also between damage ratings and yield loss in both years. The above results show the potential of finding resistance sources in the cultivars tested.
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How to cite this article:

Mumuni Abudulai, A.B. Salifu and Mohammed Haruna , 2006. Screening of Cowpeas for Resistance to the Flower Bud Thrips, Megalurothrips sjostedti Trybom (Thysanoptera: Thripidae). Journal of Applied Sciences, 6: 1621-1624.

DOI: 10.3923/jas.2006.1621.1624

URL: https://scialert.net/abstract/?doi=jas.2006.1621.1624

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