Influence of larvae solidity of cereal leaf beetle (Coleoptera, Chrysomelidae: Lema melanopus L.) on yield decreasing of small grains

Abstract

Flag leaf area in eight winter wheat cultivars (Dicna, NS rana 5, Proteinka, Jugoslavija, Studenica, KG 56-S, Levcanka and Ravanica) and one winter barley cultivar (Partizan) was investigated. The value of flag leaf varied from 10.16 cm2 in barley cultivar Partizan to 29.24 cm2 in Dicna wheat cultivar. Estimation of density of larvae on flag leaf showed differences among analyzed cultivars. The highest average number (1.27) of larvae was in Studenica cultivar and the lowest one (0.46) in Ravanica wheat cultivars and (0.42) in barley cultivar Partizan. Also difference was registered considering damages of flag leaf area which cereal leaf beetle (Coleoptera, Chrysomelidae: Lema melanopus L.) as well as differences in yield decreasing. In average the highest level of damages by larvae of beetle was established in barley cultivar Partizan (75.86%) and Studenica wheat cultivar (72.40%).