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Inheritance of resistance to the cowpea aphid in cowpea
Theoretical and Applied Genetics, 1987Inheritance of resistance to cowpea aphid, Aphis craccivora Koch, in three resistant cultivars of cowpea, Vigna unguiculata (L.) Walp, was studied. The parents, F1 and F2 population were grown in an insect-proof screenhouse. Each 3-day-old seedling was infested with 10 apterous adult aphids. Seedling reaction was recorded when the susceptible check was
Ombakho, GA, Tyagi, AP, Pathak, RS
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The ultrastructural appearance of cowpea mosaic virus in cowpea
Journal of Ultrastructure Research, 1975Cowpea mosaic virions (CPMV) were present in large numbers in cowpea tissue, both in dispersed and crystalline aggregates. Virion aggregates were found after buffered glutaraldehyde or chromate fixation at pH 7.2. Five to 10 min in 5% glutaraldehyde was sufficient for good fixation and yielded sections of greater electron-density than prolonged ...
W G, Langenberg, H F, Schroeder
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Infection of cowpea mesophyll protoplasts with cowpea mosaic virus
Virology, 1975Mesophyll protoplasts were isolated from the primary leaves of cowpeas by a one-step procedure using a mixture of Macerozyme and Cellulase. The protoplasts were inoculated with cowpea mosaic virus and virus multiplication was shown to occur by measuring the virus infectivity at various times after inoculation.
T, Hibi, G, Rezelman, A, Van Kammen
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Crystalline cowpea mosaic virus
Virology, 1980Crystals of Cowpea mosaic virus displaying a high degree of order have been grown in two different forms. Hexagonal crystals, space group P6(1)22 or P6(5)22 with a = 450 A and c = 1038 A containing six virus particles per cell, have been grown in sodium citrate buffer at pH 4.9. Each particle has four nearest neighbors at 284 A.
J M, White, J E, Johnson
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Environmental Entomology, 1994
Seeds of cowpea, Vigna unguiculata (L.) Walp, line ‘TVu 2027’ are moderately resistant to the cowpea weevil, Callosobruchus maculatus (F.). C. maculatus larvae exhibit higher mortality and take longer to develop in ‘TVu 2027’ than in more susceptible seeds. Claims have been made (Gatehouse, A.M.R., J. A. Gatehouse, P. Dobie, A. M.
Keyan Zhu +3 more
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Seeds of cowpea, Vigna unguiculata (L.) Walp, line ‘TVu 2027’ are moderately resistant to the cowpea weevil, Callosobruchus maculatus (F.). C. maculatus larvae exhibit higher mortality and take longer to develop in ‘TVu 2027’ than in more susceptible seeds. Claims have been made (Gatehouse, A.M.R., J. A. Gatehouse, P. Dobie, A. M.
Keyan Zhu +3 more
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Archives of Virology, 2017
The full-length genome sequences of two novel poleroviruses found infecting cowpea plants, cowpea polerovirus 1 (CPPV1) and cowpea polerovirus 2 (CPPV2), were determined using overlapping RT-PCR and RACE-PCR. Whereas the 5845-nt CPPV1 genome was most similar to chickpea chlorotic stunt virus (73% identity), the 5945-nt CPPV2 genome was most similar to ...
Palanga, Essowé +10 more
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The full-length genome sequences of two novel poleroviruses found infecting cowpea plants, cowpea polerovirus 1 (CPPV1) and cowpea polerovirus 2 (CPPV2), were determined using overlapping RT-PCR and RACE-PCR. Whereas the 5845-nt CPPV1 genome was most similar to chickpea chlorotic stunt virus (73% identity), the 5945-nt CPPV2 genome was most similar to ...
Palanga, Essowé +10 more
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Plant Disease, 1993
Blackeye cowpea mosaic potyvirus (BICMV) was seedborne in four cowpea seed lots (two genotypes) at incidences of 0.4-50%. Fully mature seeds were hydrated and separated into testae and embryos. Each embryo was separated further into two cotyledons and the embryo axis.
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Blackeye cowpea mosaic potyvirus (BICMV) was seedborne in four cowpea seed lots (two genotypes) at incidences of 0.4-50%. Fully mature seeds were hydrated and separated into testae and embryos. Each embryo was separated further into two cotyledons and the embryo axis.
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