10/06/2025
Not dog related...but I suspect my followers are like minded and would value this information as much I do. The little things we do (or don't do) matter. 🍂
Fall is here. Can you find ways to leave the leaves? Our obsession with raking and removing fallen leaves drastically reduces both the number and types of insects in our human controlled spaces. Many species feed internally in leaves as larvae, overwinter as larvae, or overwinter in senesced leaves. With tens of millions of acres of lawn across the United States and Canada, raking leaves and discarding them as yard waste creates a staggering loss of biodiversity every year. It's time to change our habits.
A recent scientific study in Maryland found the following:
➡Autumn leaf raking for yard waste decreased the abundance of spring emerging arthropods (moths and butterflies, beetles, wasps, flies, and spiders ) by 17 %.
➡Raking and removing leaves reduced Lepidoptera (moths and butterflies) species richness by 40 % and abundance by 45 %.
➡Raking changed the composition of Lepidoptera and parasitic wasp communities . Parasitic wasps provide free, non-pesticide pest control for our gardens, and birds rely on caterpillars to feed their young.
➡Leaf mining moths and their associated parasitic wasps were most adversely affected.
➡Retaining leaves supports arthropods in both high and low maintenance yard areas.
Source: Science of the Total Environment, Volume 970, 20 March 2025, 178821, authors Max Ferlauto, Karin T. Burghardt