Biology and distribution of Eusericamurzka (Ram, mas) (Coleoptera, Scarabaeidae) as pest infects Alfalfa plant Medicagosativa (Fabales: Fabaceae) in some farms of Sabha (Libya)

Abstract

This study was aimed to record the biology and distribution of Eusericamurzka (Ram, mas) (Coleoptera, Scarabaeidae) on alfalfa plant. The adults feed on Alfalfa plant, specially, on green and root parts and cause economic effects. The adult (male or female) has brown or bright brown, length 7-9mm, width 4mm, the antenna is not clear from the dorsal side during the sleeping period, eggs are spherical or oval sheep, and white or yellowish in colour located between green and root area. Larvae lives in sand and feeds on roots. Larvae is white colour, 1.5cm length, the head is brown in colour, larvae lives 35days. Eusericamurzka (Ram, mas) has two generations, the first generation from April to June, whereas, the second generation from august to October. The effects were Varity from serve to none, some of effects recorded 50% in Hajara area, whereas, in other area 5%, and last seasons during survey (2014-2015) were absent compared to alfalfa pure plant.