1Département d’Écologie et Génie de l’Environnement, Faculté des Sciences de la Nature et de la Vie et Sciences de la Terre et de l’Univers, Université 8 Mai 1945 Guelma, BP 401, Guelma24000. Algeria
2Laboratory of Silicates, Polymers, and Nanocomposites, University 8 Mai 1945 Guelma, BP 401, Guelma24000, Algeria
3Laboratory of Agriculture and Ecosystem Functioning, Department of Agronomy Sciences, Faculty of Natural and Life Sciences, Chadli Bendjedid University El Tarf, BP 73, EL Tarf36000, Algeria
4Higher School of Saharan Agriculture, National Road N° 06, Adrar01000, Algeria
5Department of Agronomy; University of Ghardaïa, BP 455, 47000Ghardaia, Algeria
6Directorate of Agricultural Services, Bara Lakhdar District, Sedrata Road, Guelma24000, Algeria
*Email: khaladi.omar@univ-guelma.dz (corresponding author):
This study reports the first comprehensive survey of insect pests associated with oilseed rape (Brassica napus L., InVigor variety) in the Guelma region, eastern Algeria, with a focus on the parasitism of the cabbage aphid Brevicoryne brassicae (Linnaeus, 1758). Sampling was conducted over a 6-hectare plot using yellow traps (pre-flowering), beating (full bloom), and direct sampling (post-flowering). The pest complex included the pollen beetle Brassicogethes aeneus (Fabricius, 1775), the flea beetle PsyUiodes chrysocephala (Linnaeus, 1758), Ceutorhynchus spp., Tropinota spp., the bird cherry-oat aphid Rhopalosiphum padi (Linnaeus, 1758), the green peach aphid Myzus persicae (Sulzer, 1776), and B. brassicae. During fruit maturation, two dominant primary parasitoids of B. brassicae were recorded: Diaeretiella rapae (McIntosh, 1855) and Lysiphlebus testaceipes (Cresson, 1880). Hyperparasitoids, including Pachyneuron aphidis (Bouche, 1834), Asaphes vulgaris (Walker, 1834), and Syrphophagus sp., were also detected and may reduce the effectiveness of biological control.
Brassica napus, InVigor variety, yellow traps, field survey, coleopteran pests, aphids, aphid parasitoids, hyperparasitoids, Diaeretiella rapae, Lysiphlebus testaceipes, Pachyneuron aphidis, Asaphes vulgaris, Syrphophagus sp., Guelma, eastern Algeria
