Fig. 6From: Isoprene emission by poplar is not important for the feeding behaviour of poplar leaf beetles C. populi bioassay under field conditions. The experimental scheme shows the days of sampling, harvesting and the release of the beetles (a). A picture of the semi natural experimental cages (b) and C. populi location (c), leaf consumption (d) and laid eggs (e) on isoprene emitting (IE; ■) and non-emitting (NE; □) poplar trees in cages during a 14-day experiment. Consumed leaf area (b) is a visual approximate in which a scale 0-to-5 (0: no damage; 1 < 10 % infested leaf, 2: 20-to-25 %, 3: 25-to-50 %, 4: 50-to-75 % and 5 > 75 % infested leaf) was applied. Mean ± SE of 8 replicates is presentedBack to article page