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Pod wall trichomes and resistance of two wild cowpea, Vigna vexillata, accessions to Maruca testulalis (Geyer) (Lepidoptera: Pyralidae) and Clavigralla tomentosicollis Stal (Hemiptera: Coreidae)


, : Pod wall trichomes and resistance of two wild cowpea, Vigna vexillata, accessions to Maruca testulalis (Geyer) (Lepidoptera: Pyralidae) and Clavigralla tomentosicollis Stal (Hemiptera: Coreidae). Bulletin of Entomological Research, 794: 595-605

Experiments were conducted to investigate the role of pubescence in the resistance of 2 wild cowpea (Vigna vexillata) varieties, TVNu 72 and TVNu 73, to feeding and damage caused by 2 cowpea (V. unguiculata) pests, Maruca testulalis and Clavigralla tomentosicollis. The fine structure of the trichomes was also studied by electron microscopy in order to try to determine the role played by trichomes in the resistance of these varieties to both pests.


Accession: 001912204

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Related references

Oghiakhe, S.; Jackai, L.E.N.; Hodgson, C.J.; Ng, Q.N., 1993: Anatomical and biochemical parameters of resistance of the wild cowpea, Vigna vexillata Benth (Acc. TVNu 72) to Maruca testulalis Geyer (Lepidoptera: Pyralidae). The anatomical and biochemical basis of resistance of Vigna vexillata (Acc. TVNu 72) to Maruca testulalis [M. vitrata] was investigated. An uncharacteristic network of fibrous structures was observed on the petal surface of TVNu 72, but not on tha...

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Olatunde, G.O.; Odebiyi, J.A.; Chiang, H.S.; Jackai, L.E.N., 1991: Identification of sources of resistance in cowpea vigna unguiculata l. walp. to clavigralla tomentosicollis stal. hemiptera coreidae. Thirty-six cowpea cultivars were evaluated for their resistance to the pod-sucking bug, Clavigralla tomentosicollis Stal. in the screenhouse and in field experiments. Absolute resistance was not found in any of them, although cultivars with relati...

Jackai, L.E.N.; Nokoe, S.; Tayo, B.O.; Koona, P., 2001: Inferences on pod wall and seed defences against the brown cowpea coreid bug, Clavigralla tomentosicollis Stal. (Hem., Coreidae) in wild and cultivated Vigna species. Studies were conducted in the laboratory to investigate the different components of the resistance of Vigna vexillata (accession TVnu 72) and several cultivars of Vigna spp. to infestation and damage by the brown cowpea coreid, Clavigralla tomento...

Koona, P.; Osisanya, E.O.; Jackai, L.E.N.; Tamo, M.; Reeves, J.; Hughes, J.D.A., 2002: Pod surface characteristics in wild and cultivated Vigna species and resistance to the coreid bug Clavigralla tomentosicollis stal. (Hemiptera: Coreidae). Several Vigna species were used to determine the role of pod trichomes and pod toughness in the resistance of cowpea to feeding damage by the coreid bug Clavigralla tomentosicollis Stal. The scanning electron microscopy study revealed the presence...

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