TITLE:
Damage Associated with Lepidoptera Rice Stem Borers in an Integrated Cropping System in Bama, Western Burkina Faso
AUTHORS:
Delphine Ouattara, Kossi Latevi, Rabiéta Simdé, Fabien Kis-Wend-Sida Tiendrébéogo, Innocent Sibiri Yaméogo, Souleymane Nacro
KEYWORDS:
Insects, Dead Hearts, White Heads, Rice
JOURNAL NAME:
Open Journal of Applied Sciences,
Vol.14 No.11,
November
29,
2024
ABSTRACT: Lepidoptera stem borers cause significant damage in irrigated rice in Burkina Faso. This study was conducted to monitor the damage associated with these insect pests in an integrated cropping system over two consecutive years, 2020 and 2021. We used a randomized split-plot design in a latice design. Two rice varieties (FKR64 and Orylux6) were factors and four types of crop management before rice were used. Mineral fertilization (F0, F1, F2, F3) was distributed in secondary plots as the third factor. Weekly entomological assessments were conducted. Dead hearts and white heads were randomly sampled during the vegetative and the reproductive phases of the rice plant, respectively. Pre-immature populations of stem borers were recorded after laboratory dissection of rice tillers showing symptoms of damage. Chilo spp. was the most represented stem borer, irrespective of rice variety and type of treatment. Lepidoptera damage was higher in plots with higher NPK and legume than previous crops at 42 days after transplanting. The highest average rate of pre-immature stem borer populations was recorded on the Orylux6 variety. Parasitoids associated with stem borers belonged to four families of the order Hymenoptera. The highest yields were recorded in plots with the FKR 64 * F1 combination.