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Identification & Biology
Trees Gypsy Moths Like
How Gypsy Moths Harm Trees
Where Gypsy Moths Are
Gypsy Moth Management
History of Gypsy Moths
Asian vs. European Gypsy Moth
Egg StageIdentification And Biology Of The Gypsy Moth In Indiana

Egg Stage - July Through April
Female gy[psy moth depositing eggs

A female gypsy moth depositing
her eggs. (John Obermeyer,
Purdue University)

Female gypsy moths lay their eggs in large fuzzy clumps called egg masses. Each egg mass is around 1-1/2 inches long and contains between 500 to 1,000 eggs.

Gypsy moth eggs must be kept warm and dry before hatching. Females cover their egg masses with a layer of velvety, buff-colored hair pulled from their bodies. These hairs protect the eggs from harsh temperature swings in winter.

Gypsy moth females prefer to deposit their eggs in hidden places. Egg masses are commonly found in cracks in tree bark, under eaves on roofs, in log piles, on rock walls, under picnic tables, and even in wheel wells of mowers and vehicles.

gypsy moth egg mass

Gypsy moth eggs within the mass
(John Obermeyer, Purdue University)

GM egg mass on mail box

GM egg mass on a mailbox
(John Obermeyer, Purdue University)

GM egg mass on old metal tank

...on an old metal tank
(John Obermeyer, Purdue University)

GM eggs on rock crevices

...on rock crevices
(John Obermeyer, Purdue University)

GM eggs on a discarded metal sheet

...on a discarded metal sheet
(John Obermeyer, Purdue University)

in the cracks of bark on a tree the cracks of bark on a tree
(John Obermeyer, Purdue University)

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