Evaluation of Pheromone Lure of Grapholita molesta (Lpidoptera: Torticidae) and Forecasting Its Phenological Events in Suwon

복숭아순나방 성페로몬 미끼 평가 및 수원지역에서 주요 발생시기 예찰

  • Kim Dong Soon (Faculty of Bioscience and Industry, College of Applied Life Science, Cheju Natl. Univ.) ;
  • Boo Kyung Saeng (School of Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul Natl. Univ.) ;
  • Jeon Heung Yong (Horticultural Environment Division, National Horticultural Research Institute, RDA.)
  • Published : 2004.12.01

Abstract

The sex pheromone blend (28-12AC : E8-12AC : Z8-12OH = 95 : 5 : 1) of oriental fruit moth, Grapholita molesta (Busck), was evaluated with reference to its male attractivity at different dosage and lure longevity of 1.0 mg in a field condition. Also, degree-days (DD) were calculated up to major phenological events of G. molesta using seasonal adult flights monitored by pheromone traps and egg population densities in early season in Suwon peach orchards. In the range of 0.1-4.0 mg dosage examined, G. molesta males caught in pheromone trap decreased with increasing total pheromone doses. The highest number of G. molesta males were attracted in traps baited with 0.1 mg-lure, and there were no significantly differences among 0.5 to 4.0 mg-lure. In longevity test with a 1.0 mg-lure, there was no difference in mean numbers of G. molesta males caught between traps with fresh-baited lures every 20d and field-lasted lures up to ${\approx}50d$ after trap installation, but thereafter more G. molesta males were attracted in the field-lasted lures than in the fresh-baited lures. Accumulated degree-days (DD) from January 1 to the first adult emergence (biofix) were 39DD at a lower threshold temperature $8.1^{\circ}C$. Degree-days from the biofix up to the 1st adult peak through 4th peak were 98DD, 620DD, 1233DD, and 1916DD, respectively. Required degree-days from the 1st adult peak to the 1st egg peak were 130DD, while the 2nd egg peak timing was simultaneous with the 2nd adult peak. Further, management strategies of G. molesta were discussed in peach orchards.

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