Abstract
A laboratory screening method was developed for evaluating resistance of cowpea, Vigna unguiculata (L.) Walp, to Clavigralla tomentosicollis Stal. The technique uses dry cowpea seeds, which were judged better than fresh seeds or fresh pods, to identify protracted nymphal development and high cohort mortality. Two wild cowpea relatives, TVNu 72 and TVNu 73, were highly resistant to C. tomentosicollis . Insect mortalities were >85% on the resistant lines as compared to <25% on the susceptible lines. Survivors on the resistant lines had extended developmental times. The resistant lines are highly pubescent but pubescence may not be the major factor responsible for this resistance. Laboratory results compared well with those obtained from greenhouse findings and field tests, giving correlation coefficients ( r ) of 0.96 and 0.85, respectively. The laboratory screen is accurate, fast, and inexpensive.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
