Evaluation de deux composantes de lutte intégrée (résistance variétale et stockage hermétique) contre le petit capucin des grains, Rhyzopertha dominica Fabricius (Coleoptera: Bostrichidae) dans les stocks de sorgho [Sorghum bicolor (L.) Moench] au Burkina Faso

Abstract

Assessment of Two Components of Integrated Pest Management (Varietal Resistance and Hermetic Storage) against the Small Grain Borer, Rhyzopertha dominica Fabricius. (Coleoptera: Bostrichidae) in sorghum [Sorghum bicolor (L.) Moench] stocks in Burkina Faso This study aimed to assess the effectiveness of two components of integrated pest management against the Small Grain Borer, Rhyzopertha dominica for the implementation of healthy, efficient and sustainable strategies of sorghum 'stocks. Varietal screening and prototypes of 80-micron plastic bags, main components of the Purdue Improved Crop Storage bags in single and double layer were assessed against R dominica. The results showed that the improved white sorghum variety ICSV 1049 was the most tolerant to R. dominica attacks while the local variety of Kon Koos Buuga red sorghum was the most susceptible. The double-layered plastic bags significantly induced adult mortality of R. dominica by 50% and the reduction of their feed activity by 60 days. The growth rate of R. dominica populations is almost zero in sorghum grains bagged in single or double layer of plastic bags. The development of R. dominica larvae was significantly slower in the sorghum grains double layer bagged. The results obtained lead to interesting perspectives in the exploitation of tolerant varieties and PICS bags for an effective and sustainable post-harvest storage of sorghum stocks in the farmers' area in Burkina Faso.

Keywords

• sorghum
• rhyzopertha dominica
• tolerant variety
• triple bagging
• burkina faso