Forest Ecosystem Monitoring Cooperative(802) 656-0683femc@uvm.eduwww.uvm.edu/femc705 Spear StreetSouth BurlingtonVermont05403United States of AmericaVermont Agency of Natural Resources Vermont Department of Forests, Parks and RecreationleadForest Tent Caterpillar Egg Mass Surveys and Tree Health 1977-1980During the forest tent caterpillar outbreak in the late 1970s, sequential egg mass surveys were conducted to predict outbreaks. At each site, up to 10 branches on up to 10 trees were examined to count the number of forest tent caterpillar egg masses. Once a threshold number of egg masses was reached, defoliation was predicted and no more branches needed to be surveyed. In 1978, additional data were collected on root starch and root sap sugar content to help predict risk to tree health from past and future defoliation.Forest Tent Caterpillar Egg Mass Surveys and Tree Health 1977-1980WilmotSandradefoliationforest tent caterpillaroutbreakForest Tent Caterpillar Survey Stand Data1977-01-011980-12-31The characteristics of the stands sampled during the survey.Z1141_2385_I23DULVMC.1141.2385mySQLMatthew Gorton (2017) Forest Tent Caterpillar Survey Stand Data. FEMC. Available online at: https://www.uvm.edu/femc/data/archive/project/Forest_tent_caterpillar_egg_mass_surveys_and_tree_health_1977-1980/dataset/forest-tent-caterpillar-survey-stand-datahttps://vmc.w3.uvm.edu/vmcdevel/CI4/data/archive/project/Forest_tent_caterpillar_egg_mass_surveys_and_tree_health_1977-1980/dataset/forest-tent-caterpillar-survey-stand-dataAspectAspectintAverage_diameterAverage_diametertextAverage_heightAverage_heightintBeech_(%)Beech_(%)intBirch_(%)Birch_(%)intBush_AcresBush_AcresintCountyCountytextDateDatedateM/D/YYYYDensityDensitytextElevationElevationtextField_crewField_crewtextGrazedGrazedtextMaple_(%)Maple_(%)intNotes_Notes_textOther_species_(%)Other_species_(%)intOwnerOwnertextPlot_No_Plot_No_intReproductionReproductiontextSlopeSlopeintTownTowntextUnique_site_IDUnique_site_IDtextYearYearintYears_defoliatedYears_defoliated