Comparative seed resistance in eighty cowpea accessions to the seed bruchid,Callosobruchus maculatus(Fabricius) (Coleoptera: Bruchidae)

An integrated pest management scheme involving seed resistance and the application of powder of Cymbopogon citratus, Alstonia boonei, Hyptis suaveolens, Azadirachta indica, Loranthus braunii and Lycopersicum esculentum as protectant against the seed bettle, Callosobruchus maculatus (Fabricius), was evaluated in the laboratory at ambient temperature (29±3°C) and relative humidity (65±5%). Six resistant cowpea accessions selected from previous studies were treated with the six plant powders at 1.25% w/w in a 6×7 factorial arrangement fitted into a completely randomized design with five replicates. Seed treatment with any of the six plant powders on six accessions resulted in significantly higher adult mortality, lower oviposition rate, adult emergence inhibition, lower seed damage and higher seed germination over the control, Protection ability of the plant powders was influenced by the cowpea accessions used.

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The inheritance of seed resistance to Callosobruchus maculatus F. in cowpea (Vigna unguiculata L. Walp.). I. Analyses of parental, F1, F2, F3 and backcross seed generations

Australian Journal of Agricultural Research ◽

10.1071/ar9830681 ◽

1983 ◽

Vol 34 (6) ◽

pp. 681 ◽

Cited By ~ 30

Author(s):

RJ Redden ◽

P Dobie ◽

AMR Gatehouse

Keyword(s):

Callosobruchus Maculatus ◽

Major Gene ◽

Genotypic Effect ◽

F1 Hybrid ◽

Major Gene Effect ◽

Cowpea Seeds ◽

Maternal Genotype ◽

Genotype 2 ◽

Hybrid Seeds ◽

Seed Resistance

Bioassays for bruchid emergence on cowpea seeds were conducted on the parent, hybrid F1, F2, F3, and backcross seed generations of five crosses between susceptible cowpea lines and the resistant accession TVu 2027. The study was repeated with reciprocal F1 hybrid seeds, and reciprocal backcross hybrid seeds. For the latter, the mean day of bruchid emergence was also measured. F3 seed from individual F2 plants of one reciprocal cross were also bioassayed. Trypsin inhibitor determinations were made on the parental, reciprocal F1 and reciprocal and non-reciprocal F3 seed generations. The results indicated: (1) that the expression of resistance is mainly determined by the maternal genotype; (2) that resistance may be inherited as a major gene effect, with resistance recessive, and with the presence of modifier genes of different effects in different crosses; (3) that a cytoplasmic effect appears to be absent; (4) that a paternal or embryo genotypic effect on seed resistance can be detected in a certain backcross combination; (5) that trypsin inhibitors are partly associated with expression of resistance, but are uncorrelated in F2 segregation, and appear to be quantitatively inherited and variable between crosses. Thus additional mechanisms so far undetected may also be implicated in the expression of seed resistance to bruchids.

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Automatic, rapid screening of seed resistance in cowpea, Vigna unguiculata (L.) Walpers, to the seed beetle Callosobruchus maculatus (F.) (Coleoptera: Bruchidae) using acoustic monitoring

Journal of Stored Products Research ◽

10.1016/s0022-474x(02)00025-5 ◽

2003 ◽

Vol 39 (1) ◽

pp. 117-129 ◽

Cited By ~ 10

Author(s):

A.D. Devereau ◽

I. Gudrups ◽

J.H. Appleby ◽

P.F. Credland

Keyword(s):

Vigna Unguiculata ◽

Callosobruchus Maculatus ◽

Acoustic Monitoring ◽

Rapid Screening ◽

Seed Beetle ◽

Seed Resistance

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Inheritance of pod and seed resistance to the cow-pea seed beetle (Callosobruchus maculatus Fabr.)

The Journal of Agricultural Science ◽

10.1017/s0021859600080096 ◽

1987 ◽

Vol 108 (3) ◽

pp. 655-660 ◽

Cited By ~ 12

Author(s):

D. G. Rusoke ◽

T. Fatunla

Keyword(s):

Callosobruchus Maculatus ◽

Susceptible Cultivar ◽

Seed Beetle ◽

Land Races ◽

Land Race ◽

Cytoplasmic Factors ◽

Recessive Genes ◽

Seed Resistance ◽

Pea Seed

SummaryTwo seed-resistant land races were crossed to a seed-susceptible cultivar to produce Fl, F2, BC1; and BC2 generations. It was observed that seed resistance was conditioned by two unlinked recessive genes and cytoplasmic factors. Similarly, generations derived from a pod-resistant, seed-susceptible cultivar with a seed-resistant, pod-susceptible land race demonstrated that seed and pod resistance are independently inherited.

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The inheritance of seed resistance to Callosobruchus maculatus F. in cowpea (Vigna unguiculata L. Walp.). II. Analyses of percentage emergence and emergence periods of bruchids in F4 seed generation of two reciprocal crosses

Australian Journal of Agricultural Research ◽

10.1071/ar9830697 ◽

1983 ◽

Vol 34 (6) ◽

pp. 697 ◽

Cited By ~ 6

Author(s):

R Redden

Keyword(s):

Vigna Unguiculata ◽

Callosobruchus Maculatus ◽

Adult Emergence ◽

The Other ◽

Recessive Character ◽

Reciprocal Crosses ◽

Bruchid Resistance ◽

F2 Generation ◽

Mean Time ◽

Seed Resistance

Seed from F3 generation plants of two reciprocal crosses were evaluated for bruchid resistance, over 28 F3 families of four plants each plus an additional five plants each in 10-11 families. The variables, percentage adult emergence for a specified period and mean time to emergence, agreed with respect to describing segregation in the resistant, intermediate and susceptible categories. Resistance was expressed as a recessive character. No differences between families from reciprocal crosses were detected. There was evidence for digenic control of resistance in one cross and for monogenic control in the other, in conjunction with one, or more, modifier or minor gene loci. There was general agreement between the results for the F3 generation study and a previous study on the F2 generation.

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