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• W2015222394 abstract "Abstract: The pine sawfly, Diprion jingyuanensis Xiao et Zhang, is a serious pest of Chinese pine ( Pinus tabulaeformis Carr.) in the northern parts of China. The general biology of this recently described sawfly species is little known and in the present study we used a synthetic pheromone to monitor its flight period and to evaluate the possibility to use pheromone traps as a tool for estimating and predicting population densities. The attractant pheromone of D. jingyuanensis is (1 S ,2 R ,6 R )‐1,2,6‐trimethyldodecyl propionate and in this study we used a four‐isomer threo‐mixture containing the active attractant. Both doses tested, 1 and 2 mg/trap, revealed the same seasonal flight pattern, the higher dosage demonstrating more clear flight peaks. The first flight peak of D. jingyuanensis occurred in mid‐June during all 3 years, 1997–1999, and in 1997 and 1998 a second flight peak was also recorded in mid‐July. The flight period was similar in time for populations located at higher (1400 m) and lower altitude (1100 m), from early June to late July or early August. Temperature was the main weather factor‐affecting trap catches. Diurnal flight activity began at 9.00, peaked at 13.00 and lasted until 20.00. A series of tests with traps in different positions within stands and trees were conducted and the results demonstrated the importance of standardizing the trapping protocol in population monitoring studies. By using traps with 2 mg baits it is possible to detect sawfly occurrence at very low population densities, not detectable by other means. Strong positive correlations between trap catch and relative population density were found in 2000 and 2001, but not in 1998, when only few sites were monitored and the population was in a decreasing phase. The results are promising for future large‐scale use of pheromone‐based monitoring of D. jingyuanensis ." @default.
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• W2015222394 date "2005-07-25" @default.
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• W2015222394 title "Sex pheromone for monitoring flight periods and population densities of the pine sawfly, Diprion jingyuanensis Xiao et Zhang (Hym., Diprionidae)" @default.
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• W2015222394 doi "https://doi.org/10.1111/j.1439-0418.2005.00983.x" @default.
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