Spring/Summer 2021

If you are experiencing an invasive moth caterpillar (LDD) situation, please consider forwarding a description with photos to the following (and copy us in secretary.fottsa@tinycottager.org):


Beginning in August of 2019, FoTTSA has been sharing scientific information with residents about how to identify and take action against invasive moths called Lymantria dispar dispar or LDD for short. FoTTSA wrote to Council about the moths in July 2020, surveyed residents in September, made a deputation in October on behalf of the 93% of respondents who supported spraying with Btk by Tiny, and then wrote again in December 2020. FoTTSA is disappointed that on February 3rd, 2021 the Council of Tiny Township voted 3-2 in favour of a municipal overspray policy directed at private property owners as they attempt to save mature trees at their own expense from the 4th year of infestation by invasive moths, a non-native invasive species. Btk is a bacteria found in soil which has been approved for use by organic farmers and safely used by municipalities around North America for decades to protect mature trees from death by repeated defoliation. It does not enter the food chain, has no effect on bees and when applied at the correct time poses no threat to other moths or butterflies, including the Monarch butterfly.

Quick links:

City of Toronto LDD Moth page – here

FOCA Q and A Invasive Moths August 2020

Map of projected 2021 gypsy moth defoliation

MNRF LDD moth mapping 2020

FAQs about spraying Btk

Canada Health Btk Fact Sheet

Simcoe County LDD Moth webpage

Ontario Invading Species Awareness Program – LDD moths.

Severn Sound Environmental Association Fact Sheet


Tiny is experiencing an infestation of gypsy moths which are an invasive insect. Despite the successful use of insect predators, as well as fungal and viral controls, LDD moth populations do occasionally reach outbreak levels.

LDD Moth caterpillars are dark and hairy, with five pairs of blue dots and six pairs of red dots on the back. They feed on a wide range of coniferous as well as deciduous trees, but show a preference for oak trees. Caterpillars begin by chewing small holes, but as they mature can completely strip a tree of its leaves depending on their age and population. High levels of LDD moth caterpillars can cause trees to experience severe loss of leaves, which could cause them to enter a state of decline and make them more susceptible to further harm from other insects, diseases, and weather fluctuations.

What can you do?

September to beginning of May: Scrape  egg masses off of trees. Soak them in soapy water for a minimum of 48 hours to destroy them.









May to Mid-August: Burlapping: Install burlap wraps around tree trunks and then collect and destroy the caterpillars, pupae, adults, and egg masses. Once moths have hatched, pheromone traps are an effective way of reducing the adult male population. Check local hardware stores for supplies of traps and pheromones.

End of June-Mid-August: Collect, crush or otherwise destroy pupae/cocoons when you see them.

Beginning of May- Mid June: Consider chemical treatments such as Btk-based products or TreeAzin; however, they are extremely time sensitive for them to be effective at controlling invasivemoth. Btk is normally applied through aerial spraying.

Tiny Council and LDD Moths

FoTTSA Letter to Council July 22, 2020 – LDD Moths

Tiny Cottager LDD Moth Survey Summary Results September 2020

Gypsy Moth Survey September 2020 Complete Results

FoTTSA Deputation to Council on LDD Moths – October 19th, 2020

FoTTSA Letter to Council December 15th, 2020 – LDD Moths


Midland Today article January 25th, 2021 Tiny allowing overspray on municipal properties for gypsy moth control

Midland Today article December 2020: Gypsy moth still aflutter in the minds of Tiny residents

Reprint in the Toronto Star January 2021: Gypsy moth still aflutter in the minds of Tiny residents

Midland Today article November 2020: Tiny shoreline group demands township take action against invasive bugs

FoTTSA Flash & Gypsy Moths

FoTTSA Flash August 2019

FoTTSA Flash September 2019

FoTTSA Flash October 2019

FoTTSA Flash April 2020

FoTTSA Flash May 2020

FoTTSA Flash July 2020

FoTTSA Flash August 2020

FoTTSA Flash Late Summer 2020

FoTTSA Flash October 2020

FoTTSA Flash November 2020

FoTTSA Flash December 2020

FoTTSA Flash January 2021

FoTTSA Flash February 2021