Crop losses in cowpea due to the pod-sucking bugs Riptortus dentipes, Mirperus jaculus, Anoplocnemis curvipes and Nezara viridula
Authors:
- 19 September 2001
- journal article
- research article
- Published by Springer Nature in International Journal of Tropical Insect Science
- Vol. 21 (03) , 237-241
Abstract
The effects of increasing population densities of the cowpea pod-sucking bugs (PSB) Riptortus dentipes, Mirperus jaculus, Anoplocnemis curvipes and Nezara viridula were studied in caged potted cowpea (Vigna unguiculata) plants with infestation levels from 0 (control) to 12 adult bugs per cage. Generally, there was an increase in damage to cowpea (measured as damage to pods and seeds) with increasing in insect density. There was also a highly significant correlation between the number of infesting adult bugs and damage to pods and seeds, and a significant negative correlation between bug numbers and cowpea yield. The results suggest that control measures should be initiated at: 4 bugs (fourth instar and above) per 10 plants for R. dentipes and M. jaculus; 2 bugs per 10 plants for A. curvipes and 6 bugs per 10 plants for N. viridula at podding stage. Les effets de l'augmentation des densités de population des punaises suceuses de gousses de niébé, Riptortus dentipes, Mirperus jaculus, Anoplocnemis curvipes et Nezara viridula ont été étudiés en utilisant des plants de niébé (Vigna unguiculata) en pots, mis en cage avec des niveaux d'infestations compris entre 0 (témoin) et 12 punaises adultes. En général, on constate une augmentation des dégâts (sur gousses et graines) avec l'augmentation des densités d'insectes. Nous avons également pu établir une corrélation hautement significative entre le nombre de punaises adultes et les dégâts sur gousses et graines, et une corrélation significativement négative entre le nombre de punaises et la production de niébé. Les résultats suggèrent que pendant la formation des gousses, les mesures de lutte devraient être initiées à 4 punaises pour 10 plantes pour R. dentipes et M. jaculus, à 2 punaises pour 10 plantes pour A. curvipes et à 6 punaises pour 10 plantes pour N. viridula.Keywords
This publication has 12 references indexed in Scilit:
- Insect Pests of CowpeasAnnual Review of Entomology, 1986
- Economic Injury Levels in Theory and PracticeAnnual Review of Entomology, 1986
- Southern Green Stink Bug and Leaffooted Bug: Effect on Cowpea Production123Journal of Economic Entomology, 1982
- Insect Pests of Grain LegumesAnnual Review of Entomology, 1979
- The life-history ofAnoplocnemis curvipesF. (Coreinea, Coreidae, Heteroptera) A pest of fresh cowpea podsJournal of Natural History, 1975
- The life history ofRiptortus dentipesF. (Alydidae, Heteroptera) A pest of growing cowpea podsJournal of Natural History, 1975
- Southern Green Stink Bug: Influence on Yield and Quality of SoybeansJournal of Economic Entomology, 1974
- Economic ThresholdsAnnual Review of Entomology, 1973
- Observations on the bionomics of Laspeyresia ptychora Meyr. (Lepidoptera, Eucosmidae) infesting cowpea in NigeriaBulletin of Entomological Research, 1965
- The integration of chemical and biological control of the spotted alfalfa aphid: The integrated control conceptHilgardia, 1959