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http://dx.doi.org/10.5656/KSAE.2008.47.3.201

Genetic Differentiation of Overwintering Populations of Oriental Fruit Moth, Grapholita molesta, and Their Movement  

Park, Jung-A (School of Bioresource Sciences, Andong National University)
Son, Ye-Rim (School of Bioresource Sciences, Andong National University)
Bae, Sung-Woo (School of Bioresource Sciences, Andong National University)
Kim, Yong-Gyun (School of Bioresource Sciences, Andong National University)
Publication Information
Korean journal of applied entomology / v.47, no.3, 2008 , pp. 201-208 More about this Journal
Abstract
Spring phonology of the oriental fruit moth, Grapholita molesta, was monitored using sex pheromone traps in apple cultivating areas. Their occurrence was earlier in southern areas and their population sizes were significantly different among orchards even in a local cultivating zone. The overwintering populations appeared to move between local orchards, based on the fact that monitoring data obtained at the sites between orchards were similar to those of nearby orchards. However, within orchards, these adult movements appeared to decrease and showed skewed occurrences at the side of upwind direction or close to neighboring orchards. At initial occurrence peak(April 20-25), the ovenvintering populations of the different localities were collected and analyzed in their genetic distances. PCR-RAPD analysis indicated that there were significant genetic differences among the overwintering populations of G. molesta. This genetic differentiation of overwinterin populations may be due to genetic bottleneck following differential selection pressures against the subpopulations of G. molesta during winter on the basis of the RAPD analysis that each early spring population was significantly different to its previous fall population in the same locality.
Keywords
Grapholita molesta; genetic bottleneck; movement; overwintering; pheromone;
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