Spotted alfalfa aphid Therioaphis trifolii (Monell) (Hemiptera, Aphididae) is one of the most important alfalfa pest on the world. Also, it is the most abundant alfalfa aphid in Serbia. This aphid cause damage to alfalfa directly by feeding and indirectly by vectoring plant-pathogenic viruses. Some notes of morphology, host plants, damage, biology, vector role and distribution of spotted alfalfa aphid are given. Abundance of this aphid on alfalfa, influence of climates changes on its abundance, as well as the most important natural enemies (Coleoptera: Coccinellidae and Hymenoptera: Aphidiidae) in Serbia were analyzed.
Medical Subject Headings: food and beveragesbiochemical phenomena, metabolism, and nutritionfungi