Author(s)

Rabieta Simde¹, Delphine Ouattara¹, Elias Mano², Georges Kambou¹, Georges Kambou¹, Souleymane Nacro^3*

¹Institute of Environment and Agricultural Research (INERA), Central Horticulture Laboratory of the Regional Center of Excellence in Fruits and Vegetables of Bobo-Dioulasso, Bobo-Dioulasso, Burkina Faso.
²Institute of Research in Applied Sciences and Technologies (IRSAT), Laboratory of Natural Substances and Technologies of Natural Products and the Environment (LABTECH-PRONE), Ouagadougou, Burkina Faso.
³Kamboinsé Environmental, Agricultural Research and Training Center, Ouagadougou, Burkina Faso.

The effect of Capsicum annuum and Strophantus hispidus formulations was evaluated on Diachasmimorpha longicaudata. The formulations were obtained from the crude total extracts of C. annuum; S. hispidus and the adjuvant previously developed. The formulations were prepared according to three concentrations of extracts of each plant species (low, medium and high). These concentrations were calculated on the basis of 1.5 mg/mL of each formulation causing 18% and 15% mortality respectively in Ceratitis cosyra within 72 h. The effect of the formulations on D. longicaudata was tested using a Fisher block design with 8 treatments (C. annuum (3.75; 7.5; 12.5 g/L); S. hispidus (4.5; 9; 15 g/L); Success bait 2.4 g/L; control) and 5 replicates. For each formulation, 1.5 mL was poured into a vial containing 0.25 g of cotton. Then 20 adults of the parasitoid were added and the whole was covered with muslin and held in place with rubber bands. The parasitoids were examined after 24 and 72 hours, and those that did not react to the touch of a fine brush were considered dead. The results showed a difference between the treatments. After 24 hours of exposure, the parasitoid showed high mortality at the S. hispidus concentrations (15 g/L; 4.5 g/L) followed by the Success bait. These concentrations resulted in mortality rates of 22.50% for S. hispidus and 20.50% for Success bait. After 72 h, low parasitoid mortality (35.81%) was obtained with 3.75 g/L C. annuum, but high mortality was observed with S. hispidus (59.95%; 64.20%; 57.15%) and Success bait (54.80%). The use of C. annuum formulations at 3.75 g/L could be recommended for conserving D. longicaudata in the nature.

Concentrations, Exposure, Mortality, Parasitoid, Formulations

Simde, R. , Ouattara, D. , Mano, E. , Kambou, G. , Kambou, G. and Nacro, S. (2024) Efficacy of Botanicals on Parasitoids of Mango Fruit Flies in Burkina Faso. Advances in Entomology, 12, 24-37. doi: 10.4236/ae.2024.121003.