DOVER, Del. (June 30, 2020) – Effective July 1, the Delaware Department of Agriculture (DDA) will quarantine New Castle County in its entirety due to established populations of spotted lanternfly found in Odessa. This is an expansion of the quarantine initially enacted in February 2019 and updated in September 2019.
DDA continues to partner with USDA to conduct surveys and property assessments, while USDA oversees treatment of properties identified with tree of heaven. To date, 4,088 acres have been treated including 20,135 trees encompassing 185 properties above the Chesapeake and Delaware Canal.
Tree of heaven is necessary for the spotted lanternfly to reproduce and eliminating this invasive species helps to decrease the population of spotted lanternfly. This tree is often seen in industrial parks, along highways and railways, and in unmanaged areas or vacant lots.
“Due to the mild winter, we have experienced a high hatch rate of spotted lanternfly nymphs. This is consistent with the reports we are receiving from New Castle County residents who are asking how to get rid of this pest,” said DDA Plant Industries Administrator Jessica Inhof. “The treatment program is focused on properties that have tree of heaven present, but we know from surveying that many homeowners are finding the nymphs on other plants in their landscapes as well. We are encouraging homeowners experiencing outbreaks of this pest to use insecticides labeled for planthoppers or leafhoppers to kill nymphs and adult spotted lanternfly. If homeowners don’t feel comfortable applying insecticides themselves, they can hire a commercially licensed turf and ornamental pesticide applicator to conduct treatments.”