Vol. 6, Issue 4 (2018)
Influence of some factors on the fecundity of the female Bruchidius atrolineatus (Coleoptera-Bruchinae), cowpea pest (Vigna unguiculata Walp.) In the Sahelian area
Author(s): Moumouni Dan Mairo Adamou, Salamatou Abdourahamane Illiassou, Haoua Bori
Abstract: Bruchidius atrolineatus Pic. Is the main pest of cowpea in the field and at the beginning of storage in Niger. Some factors that may affect spawning in the female B. atrolineatus such oviposition behavior in the presence of the three varieties (local variety, TN5 / 78, HTR) on one hand and on the other hand, the influence of number seeds and generations on fertility are studied. To do this the adults used come from the variety TN5 / 78 (red color). The analysis of the results obtained a show that, in a choice situation, the female B. atrolineatus shows a greater preference for the local variety compared to the other two improved varieties. In a non-choice situation, B. atrolineatus prefers TN5 / 78. The fertility analysis based on the number of seeds seems shown that the more seeds is increasing fertility increases. Our results show that the daily fertility varies generations where 90% of eggs are laid in four days for the first generation and only 89% of eggs are laid between two and six days for the second generation. The daily fertility is much more spread out in time for the second generation (J8).