| Titre |
Impact of Climatic and Environmental Factors on the Distribution of Sitotroga Cerealella (Olivier) and Sitophilus Oryzae (Linnaeus) in Benin. |
| Auteurs |
Togola Abou [1],
Nwilene Francis E. [2],
Hell Kerstin [3],
Oyetunji Olumuye E. [4],
CHOUGOUROU CHÈPO DANIEL [5],
|
| Journal: |
European Journal of Scientific Research |
| Catégorie Journal: |
Internationale |
| Impact factor: |
0.63 |
| Volume Journal: |
121 |
| DOI: |
|
| Resume |
Angoumois grain moth (Sitotroga cerealella (Olivier)) and rice weevil (Sitophilus
oryzae (Linnaeus)) are devastating pests of stored cereals throughout the world. This study
aims to establish the effect of the climatic and environmental factors on the distribution and
infestation source of these two species in Benin. For the purpose, 138 farmers’ rice stocks
were monitored and sampled in 52 locations throughout the country. At each location, pest
populations were monitored in storage, in rice fields and in the natural habitat. The
monitoring methods comprised visual observation, monitoring of harvested panicles for the
emergence of adults and use of sex pheromone or aggregation traps. During the inspection,
parameters such as relative humidity, temperature, and grain moisture content were
measured. Finally, collected rice samples were taken to the laboratory to identify insect
species and count the number of individuals. Both species occurred at high population
densities in the southern and central regions of the country where average temperatures
(30.42 ºC to 31.2 ºC) and high humidity (85.2% to 76.8 %) prevailed. However, in the
northern region, the densities of these species were very low due to the dry weather
conditions of the region. Angoumois grain moth was observed in paddy fields and
warehouses, and its initial infestations were observed at rice maturation. Rice weevil was
mostly observed in the storage areas; it was less frequent in paddy fields. These results
helped to identify the distribution and the potential habitats of these two species in relation
to the climatic conditions of the surveyed ecozones and the moisture content of stored
grain. |
| Mots clés |
Habitats, Geographic regions, Initial infestation, Sitotroga cerealella,
Sitophilus oryzae |
| Pages |
112 - 121 |
| Fichier |
 (PDF) |