Effect of sowing dates, intra-row spacings and pesticides on cowpea pod borer, Maruca vitrata (Fab.) [Lepidoptera: Crambidae] populations on cowpea, Vigna unguiculata L. (Walp) in Katsina, Sudan savanna

Muhammad, Abdulhadi; Malgwi, A. M.; Nahunnaro, H.; Adamu, R. S.; Tamò, Manuele; Dannon, Elie Ayitondji; Datinon, Benjamin

doi:10.1007/s42690-021-00576-7

Cited by 3 publications

(5 citation statements)

References 18 publications

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“…)), a dicotyledonous crop belonging to the family Fabacea, is among the most important pulse crops grown worldwide. Cowpea is cultivated across the majority of tropical and sub-tropical countries as a vegetable, fodder, and seed crop [1]. Cowpeas are a vital source of plant-based protein (21-40%) and essential nutrients, including potassium (K, 19,743.74 mg/kg), calcium (Ca, 4175.56 mg/kg), and iron (Fe, 71.43 mg/kg) [2].…”

Section: Introductionmentioning

confidence: 99%

Megalurothrips usitatus Directly Causes the Black-Heads and Black-Tail Symptoms of Cowpea along with the Production of Insect-Resistance Flavonoids

He,

Gao,

Hong

et al. 2023

Plants

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The thrip (Megalurothrips usitatus) damages the flowers and pods of the cowpea, causing “black-heads and black-tails” (BHBT) symptoms and negatively affecting its economic value. However, the mechanism by which BHBT symptoms develop is still unknown. Our results showed that the microstructure of the pod epidermis was altered and the content of the plant’s resistance-related compounds increased after a thrip infestation. However, the contents of protein and free amino acids did not change significantly, suggesting that the nutritional value was not altered. Pathogens were found not to be involved in the formation of BHBT symptoms, as fungi and pathogenic bacteria were not enriched in damaged pods. Two herbivory-induced flavonoids—7,4′-dihydroxyflavone and coumestrol—were found to exert insecticidal activity. Our study clarified that BHBT symptoms are directly caused by the thrip. Thresholds for pest control need to be reconsidered as thrip herbivory did not degrade cowpea nutrition.

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Section: Introductionmentioning

confidence: 99%

Megalurothrips usitatus Directly Causes the Black-Heads and Black-Tail Symptoms of Cowpea along with the Production of Insect-Resistance Flavonoids

He,

Gao,

Hong

et al. 2023

Plants

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“…Given the paucity of information on Ootheca spp., it is necessary to consider perspectives drawn from ecological and biological analogues such as C. trifurcata . Manipulation of planting time is one of the most useful tactics for reducing the impacts of C. trifurcata [ 17 , 18 , 19 ] and has been applied successfully to many pest problems and crops [ 18 , 20 , 21 , 22 , 23 , 24 ]. In the United States, planting of soybean ( G. max ) near the end of the recommended planting period reduced early colonization and subsequent pod injury by C. trifurcata [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

“…In the United States, planting of soybean ( G. max ) near the end of the recommended planting period reduced early colonization and subsequent pod injury by C. trifurcata [ 17 , 18 ]. In Nigeria, varying the sowing date of cowpea ( V. unguiculata ) from 2 July to 18 August reduced populations of Maruca vitrata [ 22 ]. On the contrary, early and late planting of pigeon pea ( C. cajan ) in April and October, respectively, resulted in higher infestation of Helicoperva armigera compared to mid-planting in July in Nigeria [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

“…In Nigeria, varying the sowing date of cowpea ( V. unguiculata ) from 2 July to 18 August reduced populations of Maruca vitrata [ 22 ]. On the contrary, early and late planting of pigeon pea ( C. cajan ) in April and October, respectively, resulted in higher infestation of Helicoperva armigera compared to mid-planting in July in Nigeria [ 22 ]. Furthermore, while delayed planting reduced infestation by M. vitrata and pod-feeding bugs ( Clavigralla tomentosicollis and Anoplocnemis curvipes ) in north-eastern Nigeria, this was not consistent with thrips ( Megalurothrips sjostedti ) [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

“…The use of insecticides is the principal recourse for the control of insect pests in cultivated food legumes [ 22 ]. In cowpeas ( V. unguiculata ), application of insecticides lowered pest densities and improved yields [ 25 , 26 , 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

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Bean Leaf Beetle (Ootheca spp.) (Coleoptera: Chrysomelidae) Management via Planting Timing and Insecticides

Halerimana

Kyamanywa

Olaboro

et al. 2022

Insects

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Bean leaf beetles (Ootheca spp.) (Coleoptera: Chrysomelidae) are one of Africa’s most important pests of the common bean (Phaseolus vulgaris L.). Roots, leaves, floral parts, and young pods are all attacked, leading to a considerable loss in grain yield. In Uganda, there are no comprehensive prescribed management strategies for bean leaf beetles, but farmers typically try to control the pest by delaying bean crop sowing, and to a lesser extent, using insecticides. Although farmers have consistently implemented the two approaches, there is no information on the effects of the approaches in Uganda. To assess the impact of planting timing and insecticide spray regimes on bean leaf beetle populations, concomitant foliar damage, and grain yield, we set up trials in three agro-ecological zones with known presence of the beetles during the second rainy season of 2016 (2016) and the first rainy season of 2017 (2017). The first planting, coinciding with early planting, was conducted within one week after the onset of rains. The second planting, coinciding with mid planting, followed two weeks later, while the third planting, considered late planting in this study, was conducted one month after the second planting. A foliar application of cypermethrin commencing at 7 days after emergence (DAE), 14 DAE, 21 DAE, 28 DAE, and 35 DAE; a soil drench of imidacloprid at planting combined with a foliar spray starting at 7 DAE; and an untreated control were among the insecticide spray regimes evaluated. Higher bean leaf beetle abundance was recorded from mid-planting, while higher foliar damage was recorded from late planting in two of the three agro-ecological zones. However, higher marketable grain yield was recorded from early planting in all agro-ecological zones, suggesting that delayed planting may not be beneficial. Insecticide application reduced foliar damage and increased marketable grain yield, with a combination of soil drench and foliar spray resulting in much less foliar damage and, as a result, higher grain yield. However, this did not result in economic benefits. Furthermore, marketable grain yield was higher when insecticide spray regimes were combined with early planting in all agro-ecological zones during both seasons. Our findings suggest that the common bean should be planted early and that the control of the bean leaf beetle should target both the adults and the juvenile stages in the soil. Therefore, there is a need for farmers to be able to access less-expensive soil treatments.

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Dissipation kinetics, food safety evaluation and decontamination of chlorantraniliprole in cowpea

Majumder

Pandey

Divekar

et al. 2023

Journal of Environmental Science and Health, Part B

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Effect of sowing dates, intra-row spacings and pesticides on cowpea pod borer, Maruca vitrata (Fab.) [Lepidoptera: Crambidae] populations on cowpea, Vigna unguiculata L. (Walp) in Katsina, Sudan savanna

Cited by 3 publications

References 18 publications

Megalurothrips usitatus Directly Causes the Black-Heads and Black-Tail Symptoms of Cowpea along with the Production of Insect-Resistance Flavonoids

Megalurothrips usitatus Directly Causes the Black-Heads and Black-Tail Symptoms of Cowpea along with the Production of Insect-Resistance Flavonoids

Bean Leaf Beetle (Ootheca spp.) (Coleoptera: Chrysomelidae) Management via Planting Timing and Insecticides

Dissipation kinetics, food safety evaluation and decontamination of chlorantraniliprole in cowpea

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