What happens to gypsy moth populations as a result of tree defoliation?

As gypsy moth populations defoliate trees, they initially thrive due to increased food availability, leading to population growth. However, extensive defoliation can weaken or kill host trees, ultimately reducing available habitat and food sources for the moths. This can result in a population decline over time as the ecological balance shifts and resources become scarce. Additionally, the decline of host trees can promote the growth of other species that may not support gypsy moth populations.