Journal ArticleDOI
Damage to cowpea by the legume pod borer, Maruca testulalis Geyer, as influenced by infestation density in Nigeria
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TLDR
A provisional action threshold of 40% larval infestation in flowers was established, based on the increased damage caused by this level of infestationin flowers and pods and the reduction in yield compared with a > 10% pre‐spray infestation.Abstract:
In experiments at Makurdi, Nigeria, to quantify the damage to cowpea by different densities of the legume pod borer (LPB), Maruca testulalis cypermethrin 10 EC was sprayed at 0.2 kg/ha a.i. to control larvae when its infestation in flowers reached 10, 20, 30, 40 and 50% in 1985 and 10, 20 and 30% in 1986. Larval damage to the flowers and pods increased with the percentage infestation and reduced the yield to 72.1% in 1985 and 48.1% in 1986. A provisional action threshold of 40% larval infestation in flowers was established, based on the increased damage caused by this level of infestation in flowers and pods and the reduction in yield compared with a > 10% pre‐spray infestation.read more
Citations
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Journal ArticleDOI
Bionomics, host plant resistance, and management of the legume pod borer, Maruca vitrata — a review
TL;DR: There is a need to generate information on insect-plant-environment interactions, screening techniques, mechanisms and diversity of resistance, genetic transformation of host plants involving Bt genes, and use of natural enemies for integrated pest management in diverse agro-ecosystems.
The legume pod borer, Maruca vitrata: bionomics and management.
TL;DR: Bionomics, host-plant resistance, natural enemies, cultural practices, and chemical control of the legume pod borer have been discussed to identify gaps in present knowledge and to help plan future strategies for research on this pest on pigeonpea.
Journal ArticleDOI
Influence of mutation induction on the chemical composition of cowpea Vigna unguiculata (L.) Walp
O.F. Adekola,Funsho Oluleye +1 more
TL;DR: Results from the proximate analysis showed significant variation between the plant types for all parameters except crude fibre content, and mutants 7 and 14 which have the highest protein content and the least ash content are recommended for inclusion in cowpea breeding program for improved seed quality.
Journal Article
Spotted pod borer, Maruca vitrata Geyer in legumes: ecology and management.
TL;DR: For screening pigeon pea genotypes for resistance, a comprehensive methodology involving webbing damage, larval density and flower damage was attempted, however, Controlled Droplet Application, strip application and sequential spraying of selected insecticides were effective in reducing pod damage.
Dissertation
Population dyanamics and management of lepidopteran insect pests of blackgram
TL;DR: The blackgram crop suffered less by lepidopteran insect pests (S. litura, H. armigera, M. testulalis and P. orichalcea) and produced higher yield when crop sown in the months of June and July, however, the maximum yield was harvested from 1 week of July sown crop with low pest incidence.
References
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Journal ArticleDOI
Insect Pests of Cowpeas
Louis E. N. Jackai,R.A. Daoust +1 more
TL;DR: Grown mainly as a secondary crop in associa tion with other staples such as maize, sorghum, millet, and cassava, cowpeas constitute the cheapest source of dietary protein and energy for most poor people in the tropical world.
Journal ArticleDOI
Insect Pests of Grain Legumes
S. R. Singh,H. F. van Emden +1 more
TL;DR: A review is presented of the principal arthropod pests of pulse crops in the tropics and information is presented on distribution, damage, the life-cycle and control of leafhoppers, aphids, beanflies, beetles, Lepidoptera, thrips and pod-sucking Hemiptera.
Journal ArticleDOI
Pests of cowpea and their control in Northern Nigeria
TL;DR: The effectiveness of insecticides in the control of the pests that attack after flowering has commenced was investigated in field trials at Samaru, Northern Nigeria, in 1961–63, and results showed that large increases in yield could be obtained by spray treatments starting at the first appearance of the flowers.
Journal ArticleDOI
Relationship between Cowpea Crop Phenology and Field Infestation by the Legume Pod Borer, Maruca testulalis
TL;DR: The onset and fluctuation of Maruca infestation on cowpea terminal shoots, flower buds, flowers, and pods was studied and it is suggested that TVu 946 may possess a low level of resistance that could be utilized in plant breeding programs.
Journal ArticleDOI
Assessment of Losses Caused by Insect Pests to Cowpeas in Northern Nigeria
TL;DR: A method for assessing the damage by insect pests to cowpeas is presented and the potential loss in yield due to insects is over 90%, with 70% of this loss occuring during the flowering and pod formation stages.
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