Effect of intercropping cowpea with maize on abundance of Megalurothrips Sjostedti Tryb. (Thysanoptera: Thripidae) in south Benin

analyse statistique benin ciclo vital continuous cropping control de insectos crop losses cultivo continuo cultivo intercalado culture continue culture intercalaire ecologia ecologie ecology insect control intercropping life cycle pest resistance plant anatomy resistencia a las plagas statistical analysis thripidae vigna unguiculata zea mays