Crop losses in cowpea due to the pod-sucking bugs Riptortus dentipes, Mirperus jaculus, Anoplocnemis curvipes and Nezara viridula

Pitan, O.O.R.; Odebiyi, J. A.

doi:10.1017/s1742758400007633

Cited by 5 publications

(8 citation statements)

References 12 publications

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“…Similarly, data on yield components provided no lucid evidence of compensation by the plant. This observation agrees with the reports of Wein and Tayo (1978), Jackai et al (1989), Pitan and Odebiyi (2001) and Pitan (2003) where compensation was observed to cease as insect Fig. 1.…”

Section: Discussionsupporting

confidence: 93%

“…This observation agrees with the reports of Wein and Tayo (1978), Jackai et al. (1989), Pitan and Odebiyi (2001) and Pitan (2003) where compensation was observed to cease as insect density increased. However, it is possible that the tendency for compensation may be more pronounced during early flowering than podding (Jackai et al.…”

Section: Discussionsupporting

confidence: 93%

“…1974; Schalk and Fery 1982; Jackai et al. 1989; Pitan and Odebiyi 2001). The economic status or capacity of A. armigera to cause significant cowpea yield loss is therefore, the same with C. tomentosicollis and A. curvipes , and higher than R. dentipes , M. jaculus and N. viridula.…”

Section: Discussionmentioning

confidence: 99%

“…Jackai et al. 1989; Pitan and Odebiyi 2001), but such information on A. armigera is still scanty. The knowledge of yield‐loss relationships between a crop and its associated pests is an important aspect of any insect pest management programme (Hammond and Pedigo 1982).…”

Section: Introductionmentioning

confidence: 99%

“…Quantitative assessments of crop losses caused by many other PSBs, for instance, C. tomentosicollis, R. dentipes, A. curvipes, M. jaculus and N. viridula have been extensively studied (e.g. Jackai et al 1989;Pitan and Odebiyi 2001), but such information on A. armigera is still scanty. The knowledge of yield-loss relationships between a crop and its associated pests is an important aspect of any insect pest management programme (Hammond and Pedigo 1982).…”

Section: Introductionmentioning

confidence: 99%

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Yield response of cowpea, Vigna unguiculata L. (Walp), to infestation of Aspavia armigera F. (Hem., Pentatomidae)

Pitan

Odubiyi

Olatunde

2007

J Applied Entomology

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Yield-related responses of cowpea plants to artificial infestation of Aspavia armigera, at the onset of podding, at different densities, 0, 1, 2, 4, 8, 16 and 32 pairs per cage were studied on cowpea in caged pots and field plots. With increasing insect density there was a corresponding significant increase (P < 0.05) in pod and seed damage, and reduction in pod length, numbers of pods per plant and seeds per pod, seed weight and total yield. Pod production was significantly higher (P < 0.05) in infested plants than in the control; at 1-and 16-pair levels, pod production increased by 75% and 81% over the uninfested control in the pot and field experiments respectively. Then again, with increase in insect density there was a progressive high-magnitude increase in pod abortion reaching 252.6% and 200% at the 32-pair level on potted and field cowpea, respectively, resulting in drastic reductions in the number of harvestable pods. Cowpea compensation mechanism was lost completely as insect population increased. The lowest density of A. armigera at which significant reduction (P < 0.05) occurred in total seed yield compared with the control was one pair. The relationship between insect density and pod damage, and yield was best described by a quadratic + linear fit, while that between insect density and seed damage was best fit as polynomial with very high significant r-values. Chi-squared analysis showed that the models derived from pot and field data were similar.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Yield response of cowpea, Vigna unguiculata L. (Walp), to infestation of Aspavia armigera F. (Hem., Pentatomidae)

Pitan

Odubiyi

Olatunde

2007

J Applied Entomology

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Arthropod pests of pulses

Edde

2022

Field Crop Arthropod Pests of Economic Importance

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Comparative assessment of feeding damage by pod-sucking bugs (Heteroptera: Coreoidea) associated with cowpea, Vigna unguiculata ssp. unguiculata in Nigeria

Soyelu

Akingbohungbe

2007

Bull. Entomol. Res.

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Feeding trials were conducted on three (young, mid-fill and mature) developmental stages of cowpea Vigna unguiculata ssp. unguiculata pods in the screenhouse using fourth instar nymphs and adults of Anoplocnemis curvipes (Fabricius), Riptortus dentipes (Fabricius), Mirperus jaculus (Thunberg), Clavigralla tomentosicollis Stål and C. shadabi Dolling. Anoplocnemis curvipes was observed to be the most damaging coreoid species causing a yield reduction of 26.4-51.7% followed by R. dentipes (24.4-29.4%), M. jaculus (21.9-26.9%), C. tomentosicollis (17.9-22.4%) and C. shadabi (15.9-20.4%). The fourth instar nymphs of each pod-sucking bug species caused a significantly higher cowpea yield reduction than their respective adults. Similarly, infestation on young pods compared to mid-fill and mature stages resulted in significantly higher yield reduction. The results suggest that infestation levels of two fourth instar nymphs of A. curvipes or three fourth instar nymphs of the other four pod-sucking bug species per young pod should be adequate for screening of cowpea varieties for resistance to the coreoid bugs.

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Crop losses in cowpea due to the pod-sucking bugs Riptortus dentipes, Mirperus jaculus, Anoplocnemis curvipes and Nezara viridula

Cited by 5 publications

References 12 publications

Yield response of cowpea, Vigna unguiculata L. (Walp), to infestation of Aspavia armigera F. (Hem., Pentatomidae)

Yield response of cowpea, Vigna unguiculata L. (Walp), to infestation of Aspavia armigera F. (Hem., Pentatomidae)

Arthropod pests of pulses

Comparative assessment of feeding damage by pod-sucking bugs (Heteroptera: Coreoidea) associated with cowpea, Vigna unguiculata ssp. unguiculata in Nigeria

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