ISHS Acta Horticulturae 556: V International Congress on Hazelnut
HAZELNUT PESTS IN SERBIA |
| Authors: | S. Milenkovic, M. Mitrovic |
| Keywords: | Corylus avellana, filbert, Monilinia, Curculio nucum, Balaninus nucum, Phytoptus avellanae, insecticides |
| Abstract:
Pests reduce hazelnut yields worldwide, and insect feeding increases the severity of some diseases. Insects are responsible for yield reductions of 15 to over 60% in Serbia, the level depending on the year, growing conditions and control measures. Research was conducted from 1995-2000 on the major hazelnut pests in Serbia: big bud mite (Phytoptus avellanae Nal.), nut weevil (Curculio nucum L.), filbert aphid (Myzocallis coryli Goetze) and twig borer (Oberea linearis L.). Clofentezin and fenazaquin, in addition to the traditional endosulfan, are effective in controlling P. avellanae. In recent years, populations of Myzocallis coryli, previously regarded as a secondary pest, have increased. The systemic aphicides pymetrozine, pirimicarb and dimethoate are effective in controlling the filbert aphid, but fenitrothion and basudin are less effective. In 1997-1999, a sudden increase in the population of the twig borer Oberea linearis L. (Col. Cerambycidae) was recorded. Due to the biological specificity of this pest, only mechanical control in the form of pruning out and burning infested shoots was used. The number of nut weevils (Curculio nucum L.) was monitored by brushing onto a 50 x 50 cm white linen frame, and insecticide applications were timed accordingly. | |
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