Abstract
Three-year field trials were conducted to examine the efficacy of insecticides of different modes of action in the control of
green peach aphid (Myzus persicae Sulzer) on nectarines, at the localities of Smederevo and Topola in Serbia. Insecticides
from the group of neonicotinoids exhibited high efficacy in the control of M. persicae. The efficacy of imidacloprid ranged
between 92.09% and 99.86%, while the efficacy of thiamethoxam was between 53.95% and 94.15%. During the entire trial
period, organophosphate insecticides exhibited very low efficacy in the control of green peach aphid. The efficacy of
dimethoate was poor in each evaluation term, ranging between -0.41% and 20.60%, while the efficacy of chlorpyrifos was
between -17.24% and 30.96%. Deltamethrin and lambda-cyhalothrin, from the group of pyrethroids, also exhibited poor
efficacy, which ranged from -41.94 to 60.68% and from -39.68 to 35.38%, respectively. Pymetrozine had poor initial efficacy
(54.13%), although it was very good at later evaluations (98.48% and 99.14%). Similarly, the initial efficacy of flonicamid
was poor (66.01 – 69.38%), while it was high at later evaluations (95.96 – 99.88%). Sulfoxaflor, a novel compound from the
group of sulfoximines, exhibited high efficacy in the control of the green peach aphid in all evaluation terms (90.17 – 99.95%).
According to the results of this research, flonicamid, pymetrozine, sulfoxaflor and neonicotinoids can provide effective
protection of nectarine trees against M. persicae while the use of organophosphates and pyrethroids is not justified due to their
very poor efficacy.
