Studies on the legume pod-borer, Maruca testulalis (Geyer)—VI. Cowpea resistance to oviposition and larval feeding

MacFoy, G. A.; Dąbrowski, Z. T.; Okech, S.

doi:10.1017/s174275840000415x

Cited by 15 publications

(16 citation statements)

References 9 publications

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“…Total soluble sugars were higher in the pods of cultivated pigeonpea than in the wild relatives, and this may be one of the factors leading to greater feeding by H. armigera larvae on the pods of cultivated pigeonpea compared to that on the accessions of wild pigeonpeas. MacFoy et al (1983) recorded high concentrations of sugars and amino acids in the cowpea cultivar Vita-1, which is susceptible to spotted pod borer, Maruca testulalis (Geyer).…”

Section: Discussionmentioning

confidence: 99%

Morphological and chemical components of resistance to pod borer, Helicoverpa armigera in wild relatives of pigeonpea

Sharma

Sujana

Rao

2009

Arthropod-Plant Interactions

174

158

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Host plant resistance is an important component for minimizing the losses due to the pod borer, Helicoverpa armigera, which is the most devastating pest of pigeonpea. An understanding of different morphological and biochemical components of resistance is essential for developing strategies to breed for resistance to insect pests. Therefore, we studied the morphological and biochemical components associated with expression of resistance to H. armigera in wild relatives of pigeonpea to identify accessions with a diverse combination of characteristics associated with resistance to this pest. Among the wild relatives, oviposition non-preference was an important component of resistance in Cajanus scarabaeoides, while heavy egg-laying was recorded on C. cajanifolius (ICPW 28) and Rhynchosia bracteata (ICPW 214). Accessions belonging to R. aurea, C. scarabaeoides, C. sericeus, C. acutifolius, and Flemingia bracteata showed high levels of resistance to H. armigera, while C. cajanifolius was as susceptible as the susceptible check, ICPL 87. Glandular trichomes (type A) on the calyxes and pods were associated with susceptibility to H. armigera, while the non-glandular trichomes (trichome type C and D) were associated with resistance to this insect. Expression of resistance to H. armigera was also associated with low amounts of sugars and high amounts of tannins and polyphenols.Accessions of wild relatives of pigeonpea with non-glandular trichomes (type C and D) or low densities of glandular trichomes (type A), and high amounts of polyphenols and tannins may be used in wide hybridization to develop pigeonpea cultivars with resistance to H. armigera.

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Section: Discussionmentioning

confidence: 99%

Morphological and chemical components of resistance to pod borer, Helicoverpa armigera in wild relatives of pigeonpea

Sharma

Sujana

Rao

2009

Arthropod-Plant Interactions

174

158

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“…MacFoy et al [50] recorded high concentrations of sugars and amino acids in the cowpea cultivar "Vita-1", which is susceptible to spotted pod borer/Maruca. Low amounts of polyphenols in the cultivated pigeonpea might be another reason for their high susceptibility to pod borer [32].…”

Section: Biochemical Basis Of Resistance To Insectsmentioning

confidence: 99%

Conventional and Molecular Approaches towards Genetic Improvement in Pigeonpea for Insects Resistance

Choudhary¹,

Raje²,

Datta³

et al. 2013

AJPS

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Pigeonpea [Cajanus cajan (L.) Millspaugh] is an important food legume of the semi-arid tropics (SAT) sustaining livelihood of millions of people. Stagnant and unstable yield per hectare all over the world is the characteristic feature of this crop. This is primarily ascribed to its susceptibility/sensitivity to a number of biotic and abiotic factors. Among biotic factors, insects such as pod borer (Helicoverpa armigera), pod fly (Melanoagromyza obtusa) and spotted borer (Maruca vitrata) substantially damage the crop and result in significant economic losses. Management of these insects by genetic means has always been considered environment friendly approach. However, genetic improvement has always been impeded by limited genetic variability in the primary gene pool of pigeonpea. Wild species present in the secondary and tertiary gene pools have been reported to carry resistance for such insects. However, transfer of resistance through conventional backcrossing has not been much successful. It calls for gene introgression through marker assisted backcrossing (MABC) or advanced backcross breeding (AB breeding). In this review, we have attempted to assess the progress made through conventional and molecular breeding and suggested the ways to move further towards genetic enhancement for insects resistance in pigeonpea.

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“…TVu 946 is resistant to attack by the pod borer, Maruca testulalis (Geyer) (Lepidoptera: Pyralidae) (Jackai, 1982;MacFoy et al, 1983 andOkech, 1986), but is susceptible to aphids. IT81D-1137 is used as a susceptible check and IT82D-812 as a resistance check.…”

Section: Source Of Plant Materialsmentioning

confidence: 99%

Components of resistance to Aphis craccivora in some cowpea cultivars

Firempong

1988

Entomologia Exp Applicata

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Experiments were conducted to determine in six cowpea cultivars the modalities of resistance to the cowpea aphid. The resistance modality in IT82D-812 is mainly due to antixenosis, even though reproduction was minimal on this cultivar. Both antixenosis and antibiosis were found to operate in ICV 12, with antibiosis operating in the area of high nymphal mortality and low reproduction. It is suggested that when studying the modality of resistance among crop cultivars, studies of both antixenosis and antibiosis be made in order to determine where the resistance modality lies.

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Studies on the legume pod-borer, Maruca testulalis (Geyer)—VI. Cowpea resistance to oviposition and larval feeding

Cited by 15 publications

References 9 publications

Morphological and chemical components of resistance to pod borer, Helicoverpa armigera in wild relatives of pigeonpea

Morphological and chemical components of resistance to pod borer, Helicoverpa armigera in wild relatives of pigeonpea

Conventional and Molecular Approaches towards Genetic Improvement in Pigeonpea for Insects Resistance

Components of resistance to Aphis craccivora in some cowpea cultivars

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