Screening of cowpeas for resistance to Clavigralla tomentosicollis Stal (Hemiptera: Coreidae)
A laboratory screening method was developed for evaluating resistance of cowpea, Vigna unguiculata (L.) Walp, to Clavigralla tomentosicollis Stål. The technique uses dry cowpea seeds, which were judged better than fresh seeds or fresh pods, to identify protracted nymphal development and high cohort...
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| Format: | Journal Article |
| Language: | Inglés |
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Oxford University Press
1990
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| Online Access: | https://hdl.handle.net/10568/101840 |
| _version_ | 1855515686340657152 |
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| author | Jackai, L.E.N. |
| author_browse | Jackai, L.E.N. |
| author_facet | Jackai, L.E.N. |
| author_sort | Jackai, L.E.N. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | A laboratory screening method was developed for evaluating resistance of cowpea, Vigna unguiculata (L.) Walp, to Clavigralla tomentosicollis Stål. 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. |
| format | Journal Article |
| id | CGSpace101840 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1990 |
| publishDateRange | 1990 |
| publishDateSort | 1990 |
| publisher | Oxford University Press |
| publisherStr | Oxford University Press |
| record_format | dspace |
| spelling | CGSpace1018402024-05-15T05:11:16Z Screening of cowpeas for resistance to Clavigralla tomentosicollis Stal (Hemiptera: Coreidae) Jackai, L.E.N. insecta cowpeas pest resistance screening ecology A laboratory screening method was developed for evaluating resistance of cowpea, Vigna unguiculata (L.) Walp, to Clavigralla tomentosicollis Stål. 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. 1990-04-01 2019-06-25T17:09:14Z 2019-06-25T17:09:14Z Journal Article https://hdl.handle.net/10568/101840 en Limited Access Oxford University Press Jackai, L.E. (1990). Screening of cowpeas for resistance to Clavigralla tomentosicollis Stål (Hemiptera: Coreidae). Journal of Economic Entomology, 83(2), 300-305. |
| spellingShingle | insecta cowpeas pest resistance screening ecology Jackai, L.E.N. Screening of cowpeas for resistance to Clavigralla tomentosicollis Stal (Hemiptera: Coreidae) |
| title | Screening of cowpeas for resistance to Clavigralla tomentosicollis Stal (Hemiptera: Coreidae) |
| title_full | Screening of cowpeas for resistance to Clavigralla tomentosicollis Stal (Hemiptera: Coreidae) |
| title_fullStr | Screening of cowpeas for resistance to Clavigralla tomentosicollis Stal (Hemiptera: Coreidae) |
| title_full_unstemmed | Screening of cowpeas for resistance to Clavigralla tomentosicollis Stal (Hemiptera: Coreidae) |
| title_short | Screening of cowpeas for resistance to Clavigralla tomentosicollis Stal (Hemiptera: Coreidae) |
| title_sort | screening of cowpeas for resistance to clavigralla tomentosicollis stal hemiptera coreidae |
| topic | insecta cowpeas pest resistance screening ecology |
| url | https://hdl.handle.net/10568/101840 |
| work_keys_str_mv | AT jackailen screeningofcowpeasforresistancetoclavigrallatomentosicollisstalhemipteracoreidae |