Selection of a Cowpea Weevil (Coleopera: Bruchidae) Biotype Virulent to Cowper Weevil Resistant Landrace TVu 2027

Shade, Richard E.; Kitch, L. W.; Mentzer, Paul E.; Murdock, Larry L.

doi:10.1093/jee/89.5.1325

Cited by 16 publications

(11 citation statements)

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“…Several factors, including the physical and chemical, have been used to explain seed resistance to bruchids [37]. Some previous works revealed that physical factors like the seed coat hardness, texture, colour and size might affect oviposition of Callosobruchus [23,38].…”

Section: Resultsmentioning

confidence: 99%

Screening for Resistance Against Pulse Beetle, Callosobruchus analis (F.) in Greengram (Vigna radiata (L.) Wilczek) Accessions

Soumia

Srivastava

Dikshit

et al. 2015

Proc. Natl. Acad. Sci., India, Sect. B Biol. Sci.

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The susceptibility of eighty five green gram accessions were evaluated against pulse beetle, Callosobruchus analis (F.) under laboratory conditions. Accessions which exhibited lesser susceptibility index during the preliminary free choice tests were further subjected to 'force choice' test for confirmation of bruchid resistance. No green gram accession was found immune to bruchid infestation and showed significant difference in terms of oviposition, developmental period, adult emergence and seed weight loss. Two accessions viz, Km-12-5 and P-S-16 revealed lesser per cent adult emergence of 12.22 and 14.29, respectively. Prolonged developmental period (25.67 and 26.00 days, respectively) and lesser susceptibility index (0.042 and 0.044 respectively) in comparison to highly susceptible Ganga 8, which exhibited a survival of 71.67 %, developmental period of 20.67 days and susceptibility index of 0.09. Correlation between GI and other growth parameters of pulse beetle on different accessions indicated that GI had negative relationship with mean developmental period (-0.924) and significant positive relationship with adult emergence (0.931), weigh loss (0.952) and eggs laid (0.734). Hence, these accessions can be effectively used as promising donors for developing bruchid resistant varieties which would ensure food security by reducing postharvest losses under storage conditions.

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Section: Resultsmentioning

confidence: 99%

Screening for Resistance Against Pulse Beetle, Callosobruchus analis (F.) in Greengram (Vigna radiata (L.) Wilczek) Accessions

Soumia

Srivastava

Dikshit

et al. 2015

Proc. Natl. Acad. Sci., India, Sect. B Biol. Sci.

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“…(Messina andRenwick 1985, Shade et al 1996), and common bean, Phaseolus vugaris L. (Schoonhoven et al 1983) after selection through several generations on C. maculatus-resistant seeds. Shade et al (1996) concluded that these bruchid individuals do not represent an emerging C. maculatus biotype but may result from a chance avoidance of the resistance factor by individual larvae, coupled with seed-to-seed variation for the resistance factor. However, after selecting Ͼ53 generations on the resistant seeds, they were able to develop a C. maculatus biotype virulent to the resistant cowpea accession TVu2027 (Shade et al 1996).…”

Section: Discussionmentioning

confidence: 99%

Characterization of Resistance to <I>Callosobruchus maculatus</I> (Coleoptera: Bruchidae) in Mungbean Variety VC6089A and Its Resistance-Associated Protein VrD1

Lin¹,

Chen²,

Horng³

2005

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Characteristics of resistance of VC6089A, a mungbean, Vigna radiata (L.) Wilczek, bred by using a wild Vigna species, V. sublobata (Roxburgh) Verdcourt (accession no. TC1966), and containing a novel protein, VrD1, were investigated against the cowpea weevil, Callosobruchus maculatus (F.). The seeds of VC6089A showed high level of resistance; > 96% of the bruchid eggs failed to develop into adults, whereas 85% of eggs laid on susceptible cultivar VC1973A became adults. Mortality of surviving bruchids raised for five generations on VC6089A remained higher than 96%; however, female adults maintained high fecundity and thus showed a positive population growth through these generations. We therefore cannot exclude the possibility that the beetles could develop resistance to the resistant mungbean VC6089A. The protein VrD1 purified from seeds of VC6089A showed marked toxicity to C. maculatus when beetles were reared on artificial seeds containing varying levels of VrD1. Thorough inhibition of development was observed when artificial seeds containing 0.2% (wt:wt) VrD1 was provided for insect feeding. Our findings demonstrated the insecticidal activity of VC6089A mungbean seeds and VrD1 protein against C. maculatus. These results may facilitate safer control against bruchid infestation.

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“…TVu-2027 is the single source of bruchid resistance, so there are reasons to believe that bruchid could rapidly evolve to break the resistance. According to Shade et al (1996), after selection on resistant cowpea seeds for over 53 generations, C. maculatus was able to develop a new biotype to overcome Tvu-2027. Therefore, for durable insect-resistance, new sources of resistance are necessary for developing multiple resistance lines.…”

Section: Breeding For Bruchid Resistance In Cowpeamentioning

confidence: 99%

Resistance of cowpea to Cowpea bruchid (Callosobruchus maculatus Fab.): Knowledge level on the genetic advances

Kpoviessi¹,

Agbahoungba²,

Agoyi³

et al. 2019

J. Plant Breed. Crop Sci.

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Cowpea [Vigna unguiculata (L.) Walp.] is an important food legume. This crop considered as source of dietary protein is also used as a leafy vegetable in many African countries. Its usage as food and animal fodder is focused on food security and diminishing malnutrition particularly in marginal areas. Bruchid (Callosobruchus maculatus) is the most damaging, cosmopolitan pest of stored cowpea grains especially in the tropical region. Damage caused by this pest in cowpea is irreversible, resulting in significant loss of the grains. Several management approaches including physical barriers and biological or chemical methods are used for controlling bruchid in cowpea. Considering the qualitative and quantitative damages caused by bruchid to cowpea in storage, it is important to tackle the bruchid infestation. Development of cowpea lines resistant to bruchid is the most effective, eco-friendly and durable approach to limit the losses associated with this pest. This paper presents a review of the importance of cowpea grain, the extent of bruchid damage in cowpea and the possible control measures. The advances of conventional and molecular breeding in building resistance against this cowpea pest in cowpea are also discussed highlighting the knowledge gaps and their implications. The knowledge of the status of genetic advances will inform breeders and researchers in the development of bruchid-resistant cowpea lines.

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Selection of a Cowpea Weevil (Coleopera: Bruchidae) Biotype Virulent to Cowper Weevil Resistant Landrace TVu 2027

Cited by 16 publications

References 0 publications

Screening for Resistance Against Pulse Beetle, Callosobruchus analis (F.) in Greengram (Vigna radiata (L.) Wilczek) Accessions

Screening for Resistance Against Pulse Beetle, Callosobruchus analis (F.) in Greengram (Vigna radiata (L.) Wilczek) Accessions

Characterization of Resistance to <I>Callosobruchus maculatus</I> (Coleoptera: Bruchidae) in Mungbean Variety VC6089A and Its Resistance-Associated Protein VrD1

Resistance of cowpea to Cowpea bruchid (Callosobruchus maculatus Fab.): Knowledge level on the genetic advances

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