Spongy Moth Development

What is phenology?

Phenology is a branch of science dealing with the relations between climate and periodic biological phenomena, such as insect or plant development.

About this phenology model:

The spongy moth phenology information presented here is generated with the GMPHEN model authored by Katherine A. Sheehan with the U.S. Dept. of Agriculture, Forest Service, using weather data gathered by the WI-MN Cooperative Extension.

GMPHEN is a computer model that uses daily temperature and previously published data to predict the timing for spongy moth and host development. This model simulates spongy moth (Lymantria dispar) egg hatch, larval and pupal development, and budbreak and leaf expansion for six eastern hardwoods. GMPHEN reports the percentage of spongy moths in each life stage, mean life stage, mean percent leaf expansion, and for each host species, percent budbreak and leaf expansion.

How to use the information generated from the model:

The data generated by this model can be used for timing pesticide applications for the control of spongy moth. For more information on control of spongy moth contact your UW-Extension Agent or the Wisconsin Department of Agriculture, Trade, and Consumer Protection. For more information visit the DATCP page on spongy moth.

Phenological Indicators of Spongy Moth Development

Indicator Plant Phenological Event Spongy Moth Development
Magnolia X soulangiana Saucer cup magnolia Dropping petals Hatching
Amelanchier Juneberry Blooming Hatching
Cercis canadensis Redbud Beginning bloom Hatching
Prunis X cistena Purple leaf sand cherry Blooming Hatching
Acer plantoides Norway maple Late bloom, leafing out Hatching
Spirea X vanhouttei Bridal wreath spirea Blooming Early instars
Aesculus hippocastanum Horse chestnut Blooming Early instars
Malus ioensis Prairie crab apple Blooming Early instars
Lonicera korolkowi 'Zabelii' 'Zabels' blueleaf honeysuckle Blooming Early instars
Syringa vulgaris Common lilac Blooming Early instars
Quercus spp. Oaks Full leaf Mid instars
Spirea X vanhouttei Bridal wreath spirea Finished blooming Mid instars
Viburnum dentatum Arrowwood viburnam Beginning bloom Mid instars
Viburnum opulus European cranberry bush Blooming Mid instars
Weigela florida Old-fashioned Weigela Blooming Mid instars
Cornus alternifolia Pagoda dogwood Late bloom Mid instars
Spirea nipponica 'Snowmound' Snowmound spirea Early bloom Mid instars