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Pheromones and traps as part of an integrated control of the spruce bark beetle ips typographus some results from a control program in norway in 1979 and 1980



Pheromones and traps as part of an integrated control of the spruce bark beetle ips typographus some results from a control program in norway in 1979 and 1980



NISK (Norsk Institutt for Skogforskning) Rapport (5): 5-39



Pheromone dispensers containing methylbutenol (1500 mg), (S)-cis-verbenol (70 mg) and ipsdienol (10 mg-15 mg) were used with drainpipe traps as part of a control program for the spruce bark beetle, I. typographus L. About 600,000 traps were deployed in south Norway in 1979 and 1980. Approximately 1% in 1979 and 1/2% in 1980 were selected as test traps. The main catches were made before the middle of June, 79% of season total catches in 1979 and 96% in 1980. The average catch per trap was 4701 beetles in 1979 and 7406 in 1980, but the variations in numbers were considerable, depending on trap location and the local size of beetle population. The highest average trap catch, 11,701 beetles, was recorded in Vestfold county in 1980. The damage within 100 m distance of traps was lower in 1980, compared with 1979. The degree of improvement was highest on sites with minor infestation in 1979. New infestation in 1980 was recorded at 30% sites with minor attack (1-5 trees) the year before, whereas 70% of sites with extensive infestation (> 30 trees) had new infestation.

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Accession: 006102843

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