| Life history and natural enemy associations of calico scale (Homoptera: Coccidae) in Kentucky. | |
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MedLine Citation:
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PMID: 16156572 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Seasonal phenology of calico scale, Eulecanium cerasorum (Cockerell), was monitored for 3 yr on various deciduous tree species in central Kentucky. Infestations were found on 16 host species in six plant families. Calico scale is a univoltine parthenogenic species that overwinters as second instars on bark. Nymphs molted to adult females around mid-April and began producing eggs in late April. Mean fecundity ranged from 3,728 to 4,654 eggs per female, depending on host plant species. Date of first crawler hatch in 2001-2003 ranged from 21 to 26 May, corresponding to a mean accumulation of 818 +/- 2 Celsius degree-days (DDC), calculated from 1 January and a base of 4.4 degrees C. This value predicted crawler hatch within 2 d in Lexington, KY, in 2004. Crawler dispersal lasted 2 to 3 wk. Upon hatching, crawlers move to leaves where they feed during summer. Crawlers primarily settled on the abaxial side of leaves and their within-leaf distribution varied between different tree species. Settled crawlers molted in mid-July and second instars remained on leaves until late September through mid-October, when they returned to bark to overwinter. On hackberry, Celtis occidentalis L., they were concentrated toward the basal end of shoots, primarily because leaf flush continued beyond the end of the crawler dispersal period. Crawler distribution did not differ between upper and lower canopy zones. Fourteen species of parasitoids and a coccinellid beetle were reared from individual scales. Monitoring with sticky traps in tree canopies confirmed that targeting crawlers with insecticides during late May or June would not coincide with peak flight activity of the scale's primary parasitoids. |
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Authors:
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J L Hubbard; D A Potter |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of economic entomology Volume: 98 ISSN: 0022-0493 ISO Abbreviation: J. Econ. Entomol. Publication Date: 2005 Aug |
Date Detail:
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Created Date: 2005-09-13 Completed Date: 2005-10-06 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 2985127R Medline TA: J Econ Entomol Country: United States |
Other Details:
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Languages: eng Pagination: 1202-12 Citation Subset: IM |
Affiliation:
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Department of Entomology, S-225 Agricultural Science Center N., University of Kentucky, Lexington, KY 40546-0091, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Hemiptera / parasitology, physiology* Host-Parasite Interactions Insect Control Kentucky Life Cycle Stages Seasons Temperature Trees / parasitology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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