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Journal of the American Pomological Society
(J Am Pom Soc)

American Pomological Society

Volume 64 Number 4 Article 1 Pages: 184-197
Year 2010 Month 10
Title: Differences in Defoliation of Fruit Genotypes by Adult Japanese Beetle Feeding
Authors: D.T. Johnson, C.R. Rom, J. McAfee, J. McKern, E.T. Stafne and J.R. Clark
Since Japanese beetles (Popillia japonica Newman, Coleoptera: Scarabaeidae) were first reported in Northwest Arkansas in 1997, population and geographic distribution have increased significantly accompanied by damage to horticultural crops and other plants. The adult beetle trapping period in Northwest Arkansas counties begins in June and continues until mid-August with the greatest capture from 7 to 30 July. This paper reports observations of adult Japanese beetle (JB) damage during the period of 2003 through 2005 in fruit crops grown in Fayetteville, AR . Adult beetle trap catches increased annually from 1997 until 2004, decreased in 2005 and 2007 but rebounded in 2006 and 2008. The foliage of 262 apple, 27 apple rootstock, 17 crabapple, 21 blueberry, 20 blackberry and 17 grape genotypes was evaluated for adult JB feeding damage by multiple evaluators during two growing seasons (2003 and 2004). The majority of apple, crabapple, blackberry, blueberry, and grape genotypes had moderate to severe foliar feeding damage, but, several apple, blackberry, blueberry, and grape genotypes had minimal damage. When apples of the same cultivar (‘Gala’) on different rootstocks were evaluated, scion foliage damage varied significantly with rootstock. The findings and observations of this study may be useful in future research on the molecular or biochemical basis for variation in feeding preference, for breeding new genotypes with low adult foliar feeding susceptibility, and as a basis for developing recommendations and management strategies for Japanese beetle in fruit plantings in the upper mid-south region.

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