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Screening of Pyrus Species Resistant to Pear Psylla (Cacopsylla pyricola)  

Shin, Il Sheob (Fruit Research Division, National Institute of Horticultural & Herbal Science)
Kim, Dong Soon (College of Applied Life Science, Jeju National University)
Hong, Seong Sik (Planning and Coordination Division, National Institute of Horticultural & Herbal Science)
Kim, Jeong Hee (Technology Services Divison, National Institute of Horticultural & Herbal Science)
Cho, Kang Hee (Fruit Research Division, National Institute of Horticultural & Herbal Science)
Kim, Se Hee (Fruit Research Division, National Institute of Horticultural & Herbal Science)
Kim, Hyun Ran (Planning and Coordination Division, National Institute of Horticultural & Herbal Science)
Kim, Dae Hyun (Administrative Management & Legal Affairs Officer, Director General for Planning & Coordination, Rural Development Administration)
Hong, Se Jin (Department of Applied Plant Science, Colleage of Life Science, Gangneung-Wonju National University)
Hwang, Jeong Hwan (RDA Relocation Team, Director General for Planning & Coordination, Rural Development Administration)
Hwang, Hae Sung (Fruit Research Division, National Institute of Horticultural & Herbal Science)
Publication Information
Journal of the Korean Society of International Agriculture / v.23, no.5, 2011 , pp. 491-496 More about this Journal
Abstract
Breeding for pear resistance to pear psylla (Cacopsylla pyricola) is one of important objective of the National Institute of Horticultural and Herbal Science breeding program. One hundred thirty three accessions from 15 Asian, Chinese and European pear species were investigated for their resistance against pear psylla. The pear psylla resistance was determined based on the following four characteristics: overwintering adult population, the number of eggs and nymphs, and the degree of soot. The different pear species showed varied resistance to pear psylla. Pyrus calleryana and P. betulaefolia indicated the highest antixenosis as ovipositional preference and antibiosis as nymphal feeding and were the most resistant genetic resources. Likewise the European pears (P. communis), 'Conference' and 'Cascade', exhibited little occurrence and damage by pear psylla. These were proved to be promising genetic materials for breeding resistant cultivars because they had good fruit quality and showed resistance to pear paylla. The observed population of overwintering adult, the number of eggs and nymphs of psylla had significant correlation each other.
Keywords
fruit breeding; insect resistance; antixenosis; nymph; soot;
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