Screening of Bambara groundnut ( Vigna subterranea ) lines for Callosobruchus maculatus resistance in the Far North Region of
2014
Habiba, Kouninki | Gonné, Sobda
Callosobruchus maculatus Fabricius (Coleoptera: Bruchidae) is a serious pest of Vigna subterranea (Bambara groundnut). In the Far North region of Cameroon, this Bruchidae infests unprotected stored crops resulting in substantial damages. The reaction of nine lines of Vigna subterranea to Callosobruchus maculatus was assessed in the laboratory using grain damage symptoms (number of holes and weight losses of the grains) and beetle population growth (number of eggs and adults as well as infestation rate). The trial was conducted in a completely randomized block design with five replications. Each replication consisted of 250 grams of bambara groundnuts in a glass jar, in which the 20 couples of adult bruchids were added. The results showed that the lines Hossere, Kodek and Swahi are relatively less infested (0.6%, 5% and 7.2% respectively) and witness lower damage from the bruchid attack compared to the rest of the lines. Andrangongang and Adir minew lines were recorded as relatively high-levels of infestation (40.6% and 22.8% respectively). These results indicate the presence of varietal differences for the reaction of bambara groundnut to Callosobruchus maculatus. The use of resistant lines could be a viable and promising component for the integrated pest management of bruchids on bambara groundnuts in the Far North Region of Cameroon. In addition, the three promising lines (Hossere, Kodek and Swahi), could be used as source of resistance or tolerant genes for further breeding program.
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by Sciknow
