Evidence for Ovipositional Preference of
Callosobruchus maculatus
for Cowpea Varieties
1

Nwanze, Kanayo F.; Horber, E.; Pitts, C. W.

doi:10.1093/ee/4.3.409

Cited by 77 publications

(29 citation statements)

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“…was found to be affected by seed size, curvature of the seed, colour of the seed, thickness of the seed coat, and smoothness of the seeds (Nwanze et al 1975;Mphuru 1981). These may relate to the chemical composition of the seed.…”

Section: Resultsmentioning

confidence: 99%

Comparative susceptibility of different legume seeds to infestation by cowpea bruchid Callosobruchus maculatus (F.) (Coleoptera: Chrysomelidae)

G¹,

M²

2009

Plant Prot. Sci.

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The comparative susceptibility of seeds of ten legumes to infestation by Callosobruchus maculatus was studied in choice and no-choice experiments. Cowpea, garden pea and pigeon pea seeds recorded the significantly highest number of eggs oviposited and percentage adult emergence, the shortest developmental period, highest susceptibility indices and the highest weight loss. In a choice experiment, treatments which had a cowpea mixture recorded the maximum number of eggs deposited on that legume. The order for ovipositional preference for all legume seeds remained almost the same irrespective of the host on which C. maculatus had been reared. Also, there was no association between the seeds preferred for oviposition and culture on which the bruchid was reared. Cowpea and pigeon pea seeds were found to be highly susceptible to C. maculatus, whereas common bean, black gram and chickpea seeds were the least susceptible.

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Section: Resultsmentioning

confidence: 99%

Comparative susceptibility of different legume seeds to infestation by cowpea bruchid Callosobruchus maculatus (F.) (Coleoptera: Chrysomelidae)

G¹,

M²

2009

Plant Prot. Sci.

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“…Portanto, a diferença observada entre IT89KD-245 branco (36,5 ovos) e CNCx 409-12F de cor marrom (76,9 ovos) indica que outras causas morfológicas, como a textura do tegumento, afetaram a preferência para oviposição. Nwanze et al (1975) observaram maior oviposição de C. maculatus em grãos lisos, em relação aos rugosos. O tamanho do grão também não influenciou na oviposição, pois genótipos com grãos de diferentes tamanhos não apresentaram variação no número de ovos, estando de acordo com Osuji (1976).…”

Section: Resultsunclassified

Identificação de genótipos de caupi Vigna unguiculata (L.) Walp. resistentes a Callosobruchus maculatus (Fabr.) (Coleoptera: Bruchidae)

Lima¹,

Oliveira²,

Barros³

et al. 2001

Neotrop. Entomol.

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-The present work aimed to identify sources of resistance in 30 cowpea genotypes, from EMBRAPA Meio-Norte, to the cowpea weevil Callosobruchus maculatus (Fabr.). In a no choice test, two pairs of the insect were confined in 30 grains of each genotype, in a completely randomized design with five replications. To evaluate the resistance of the genotypes, the parameters: number of eggs/ female, viability of eggs, duration and viability of the immature phase, natural rate of population increase, and resistance index were used. By this index the genotypes IT89KD-245, TE90-180-10F, CNCx 409-12F, IT86D-716, IT89KD-260 and BR17-Gurguéia were classified as moderately resistant; CNC 0434, CNCx 405-17F, TE90-170-76F, TVu-249, IT89KD-381, BR14-Mulato, TE87-98-8G, TE87-1115-10G, CNCx 955-1F, CNCx 676-51F, TE87-98-13G, TE90-172-42E and TE87-98-9G-2 as susceptible, and Bico de Pato, TE90-180-3E, TE90-179-14E, TE90-170-29F, Monteiro, TE84-27-7G, CNCx 409-11F, TE90-172-33F, TE90-180-88E, TE90-170-40F and TE90-180-13E as highly susceptible. The genotypes IT89KD-245 and CNCx 955-1F showed non-preference for oviposition. The genotype IT89KD-245 was the only one classified as resistant, showing the least natural rate of population increase, the smallest viability and the largest duration of the immature phase, expressing antibiosis.

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“…Lima et al (2001) identifying cowpea genotypes resistant to Callosobruchus maculatus (F.), observed that morphological causes and tegument texture affect the preference for oviposition. Nwanze et al (1975) observed higher oviposition of C. maculatus on smooth grain than rough grain.…”

Section: First Selection Of Genotypesmentioning

confidence: 65%

Resistance of Cowpea Genotypes to Zabrotes subfasciatus (Boheman, 1833) (Coleoptera: Chrysomelidae: Bruchinae)

Toledo¹,

Fontes²,

Barbosa³

et al. 2013

JAS

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Cowpea (Vigna unguiculata (L.) Walp.) when stored is mainly attacked by bruchid Coleopterans. The control of these pests is done primarily through chemicals, however, with problems related to the selection of resistant insects, alternative forms of control are searched. Seeking an alternative control, the objective this work was to evaluate the resistance of cowpea genotypes to the attack of Z. subfasciatus. In the first selection of genotypes were evaluated 35 cowpea genotypes, being observed the variables: number of eggs, number of insects emerged and weight loss (%). In this first selection of cowpea were selected 10 genotypes. In the second selection of genotypes, the 10 most resistant from the first selection were used, but with eight repetitions per genotype, besides evaluating the egg viability (%) and instantaneous rate of population growth. The cowpea genotypes showed significant differences for resistance to attack by Z. subfasciatus. The most resistant to Z. subfasciatus were BRS Tracuateua, 31 MNC03-720C-20, 26 MNC00-553D-8-1-2-2 and 37 MNC05-832B-234-5.

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Evidence for Ovipositional Preference of Callosobruchus maculatus for Cowpea Varieties 1

Cited by 77 publications

References 0 publications

Comparative susceptibility of different legume seeds to infestation by cowpea bruchid Callosobruchus maculatus (F.) (Coleoptera: Chrysomelidae)

Comparative susceptibility of different legume seeds to infestation by cowpea bruchid Callosobruchus maculatus (F.) (Coleoptera: Chrysomelidae)

Identificação de genótipos de caupi Vigna unguiculata (L.) Walp. resistentes a Callosobruchus maculatus (Fabr.) (Coleoptera: Bruchidae)

Resistance of Cowpea Genotypes to Zabrotes subfasciatus (Boheman, 1833) (Coleoptera: Chrysomelidae: Bruchinae)

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