Applicabitity of pheromone baited traps in the forest practice
1997
Lakatos, F. (Soproni Egyet., Sopron (Hungary). Erdo- es Faanyagvedelmi Tanszek)
Ips typographus (L.) and Pityogenes chalcographus (L.) are the most important forest pests on Norway spruce (Karst.) in Hungary. The mass outbreak of these beetle species since 1991 occur several damages. Present paper reports the application of pheromone baited traps in forest practice. The investigations were carried out in West-Hungary, in the mountains of Sopron and Koszeg with Theysohn traps and several types of pheromones. The duration was 6 years (1991-1996). The results show, that it is possible, to protect an object by this method or reduce the number of infested trees at least. The tree mortality was 7,9 percent respectively. But this is only practicable, if this the method is associated with the clean-management. The new infestations seems to be good forecasted by the capture characteristics of the first and second generations. The comparison of the different pheromone products shows, that in the Hungarian Norway spruce stands Chalcoprax and Pheroprax are the best applicable attractants for use. All the other investigated odour compound are not propostable for use. The paper present a complete list of insect species captured by the traps behind the major bark beetle species
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