Since 2010 spongy moth populations have been very low in large part due to natural enemies (Entomophaga fungus, nucleopolyhedrosis virus - NPV, and the Encyrtid Wasp Ooencyrtus kuvanae). The past 2-3 years have seen a marked increase in populations unfortunately. The drought in 2021 and the unseasonably hot weather in 2022 has significantly hindered the fungus as it needs cool, wet conditions to thrive and the virus and wasp have not been able to make a dent on their own.
Current Status in Middleton
Home Treatment Options
Mid-October-Mid-April: Destroy egg masses