Spotted lanternflies hatch in April, meaning their egg sacs must be removed in March. The invasive species is now found across 20 U.S. states. Spotted lanternflies attack tree groves, hardwood forests ...

In a region where the scale of the problem can feel overwhelming, 431 is a significant breakthrough.

Each mature spotted lanternfly can lay one or two sacs per season, and these numbers add up by the time they hatch in the spring. At this point, it’s too late to control the population, and the damage ...