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Go to:85. Evaluation of Silvicultural Treatments to Minimize Gypsy Moth Impact (WVU Study)

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Catalog of Long Term Research Conducted by the Northeastern Research Station

Catalog #84

IPS - Intensive Plot System
To describe gypsy moth population dynamics in different habitat types.
NY:Whitehall, Lake George area. 
MA:Harwich, Hawkness State Forest, Cape Cod. 
MA: Ludlow, Ludlow Reservoir. 
NJ:New Lisbon, Lebanon State Forest. 
Locations were in woodlands that contain extensive acreages of varying mixtures of host and non-host tree species. Areas chosen all had potentially defoliating populations at the beginning of the study. Areas chosen have a network of roads to permit access to the sites. Sites are relatively homogeneous with respect to soil, soil moisture conditions, and plant cover. Less than 50' elevation difference exists within a site.
Six 12-hectare study areas, each divided into six 2-hectare sites with five 0.5-acre plots in each site; actual number of sites per area varied from 5 to 8. Design and selection of study areas per plot by Robert Campbell.
None besides natural defoliation from gypsy moths.
Visual determinations were made of egg masses each winter and percent defoliation the following summer.
Dependent: Defoliation, diameter, dominance & condition of trees in plots. Gypsy Moth egg mass and locations.
Each plot was marked with a metal stake, maps exist of some plot locations. Numerous subsets of the IES data were produced; the 9-track tape at Hamden has documentation attesting to its reliability and that it is the "best" version; however, it does not contain all the variables measured in the IES plots.
Three file cabinets at Ansonia, CT. contain hardcopy of original tally sheets and summary statistics. One 9-track tape in Hamden, CT. contains corrected, verified egg mass, defoliation, tree health, and site variables. One 9-track tape and 1 diskette in Morgantown, WV. (M.J. Twery) contains tree condition and egg mass counts for the Ticonderoga, Dresden, and Whitehall, NY areas.
Studies of Ecosystem Processes Model Development and Application
partially 1994 
Campbell, R.; Sloan, R.J. 1978. Natural maintenance and decline of Gypsy Moth outbreaks. Environmental Entomology, June 1978. 7(3): 389-395. 

R.C. Rearden. 1976. Parasite incidence and ecological relationships in field populations of Gypsy Moth larvae and pupae. Environmental Entomology, October 1976. 5(5): 981-987. 

M. Montgomery. 1990. Chapter 7 - role of site and insect variables in forecasting defoliation by the Gypsy Moth. In: Watt, A.D.; Leather, S.R.; Hunter, M.D.; Kidd, N.A.C., eds. Population dynamics of forest insects. Intercept, Ltd. 73-84.

Mike Montgomery, USDA Forest Service, 51 Mill Pond Rd., Hamden CT 06514. (203) 230-4331
Numerous cooperators existed during active data collection years.



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