Important Insect Pests in Madicago sativa L. in Bulgaria

Abstract This paper describes common insect tormentors in forage alfalfa in Balkan country and their seasonal dynamics. the strategy of sweeping with the entomologic web was used. The degree of infestation (attack) of Otiorrhynchus ligustici was established by taking soil monoliths. the foremost common insect pests of alfalfa from order Coleoptera are Hypera postica, Sitona spp., Apion seniculus, and Otiorrhynchus ligustici. the subsequent species belongs to orders animal order and order Thysanoptera. Therioaphis maculata was the most harmful coinage, followed by Acyrthosiphon genus Pisum from Aphidodea, additionally Adelphocoris lineolatus and genus Lygus rugulipennis (Hemiptera – Heteroptera). Economic importance species from Hemiptera: Fulgorormorpha and Cicadomorpha were Empoasca pteridis and Agallia ribauti, additionally Thrips tabaci and T. atratus (order Thysanoptera). Apion seniculus is reported for the primary time in our country as harmful species in alfalfa. the most insect pests, counting on the order to that they belong, were found in high numbers through the various regrowth of alfalfa vegetation amount. The determination of the population dynamics of economically necessary tormentor species within the alfalfa fully grown for forage, helps confirm the foremost acceptable time for management and management.

Keywords: Alfalfa, insect pest, seasonal dynamic, Bulgaria

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