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Effect of trap height and spacing in relation to crop height on catches of the millet stemborer, Coniesta ignefusalis Males

Published online by Cambridge University Press:  19 September 2011

O. Youm ,
P. S. Beevor ,
L. J. McVeigh  and
A. Diop
O. Youm*
Affiliation:
International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) Sahelian Center, B.P. 12404, Niamey, Niger
P. S. Beevor
Affiliation:
Natural Resources Institute, Central Avenue, Chatham Maritime, ME4 4TB, UK
L. J. McVeigh
Affiliation:
Natural Resources Institute, Central Avenue, Chatham Maritime, ME4 4TB, UK
A. Diop
Affiliation:
International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) Sahelian Center, B.P. 12404, Niamey, Niger
*
*Corresponding author: OY.
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Abstract

Studies were conducted using a water-based trap baited with the synthetic female sex pheromone to gain further understanding on the effect of trap height and spacing in relation to crop height on catches of males of the millet stemborer, Coniesta ignefusalis (Hampson) (Lepidoptera: Pyralidae). Regardless of crop height, catches were greatest at trap heights of 0.10 and 0.50 m when the traps were stacked vertically. When traps were sited singly at 50 m spacing there was no significant difference in catches at the different heights. When trap spacing was varied from 50,15, 5,1 to 0 m, male moth catches in traps increased at lower trap heights, regardless of crop height. Comparison of catches in light traps and pheromone-baited traps showed a significant positive correlation. These findings have implications for both monitoring and development of millet stemborer control systems through mating disruption and mass trapping.

Résumé

Des études ont été menées utilisant un piège à eau appâtée avec la phéromone sexuelle afin de mieux cerner l'effet de la hauteur des pièges et de leur espacement par rapport à la hauteur des plantes de mil sur la capture des mâles du foreur de tige de mil, Coniesta ignefusalis (Hampson) (Lepidoptera: Pyralidae). Les résultats montrent que la capture était meilleure avec les hauteurs de pièges de0.10 à 0.50m, quelque soit la hauteur des plantes, si ces pièges sont positionnés verticalement à un site. Un espacement des pièges de 50 m indique généralement une différence de captures non significative selon les hauteurs de pièges et de plantes. Cependant, une variation progressive de l'espacement entre pièges allant de 50 m, 15, 5,1, à 0 m (pièges empilés verticalement en un site) entraine des captures plus importantes au niveau des pièges du bas. Une comparaison entre les captures au piège lumineux et au piège à phéromone montre une correlation positive. Ces résultats ont une portée dans la surveillance et le dévelopment des méthodes de lutte se basant sur le piègeage en masse et la perturbation des accouplements par methode de confusion.

Keywords

pheromonestemborerConiesta ignefusalismillettrappest managementphéromoneforeurs de tigesConiesta ignefusalismilpiègelutte intégrée
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 17 , Issue 2 , June 1997 , pp. 235 - 240
Copyright
Copyright © ICIPE 1997

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References

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