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http://dx.doi.org/10.5656/KSAE.2013.08.0.045

Effects of Humidity and Citrus Leaf Age on the Multiplication of Aculops pelekassi (Acari: Eriophyoidea) and Seasonal Population Abundances in Citrus Orchards  

Seo, Yon Dong (The 21st Century Life Science Foundation, Hankook Life Science Institute)
Kim, Dong-Soon (Faculty of Bioscience and Industry, College of Applied Life Science, SARI, Jeju Nat'l. Univ.)
Publication Information
Korean journal of applied entomology / v.53, no.1, 2014 , pp. 1-6 More about this Journal
Abstract
The pink citrus rust mite, Aculops pelekassi (Keifer) (Acari: Eriophyoidea), is an important pest in the citrus orchards of Jeju, Korea. This study was performed to investigate the seasonal population abundance of A. pelekassi, and the effects of humidity and citrus leaf age on the multiplication of this pest. Relative humidity (RH) significantly affected the longevity and fecundity of A. pelekassi. Longevity was 7.5, 14.5 and 14.6 d and fecundity was 5.4, 21.5, and 27.1 eggs at 33, 75 and 84% RH, respectively. The leaf age of citrus significantly affected the multiplication of A. pelekassi. The population abundance on 40 day-old leaves was much higher more than 3 times that on 10-day old leaves at 4 weeks after introduction. Overwintered A. pelekassi adults between the bud scales of the citrus trees became active in late April; they were found on newly emerged leaves, followed by their settlement on young fruits in mid-June. The population levels of A. pelekassi peaked on the leaves in late June to July, and on the fruits in early August. The results obtained in this study should be useful for the control of A. pelekassi in citrus orchards in Jeju.
Keywords
Aculops pelekassi; Citrus; Humidity; Leaf age; Seasonal abundance;
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