Weather conditions in the St. Johns area can swiftly change, monitor weather conditions closely throughout the day.
If you see anyone spraying pesticides in today's conditions please report the activity.
Elm span outbreaks are often caused by low populations of T.Droozi; a small beneficial insect about the size of a fruit fly. It is a great predator to the elm span worm, killing the elm span in the egg stages before they ever hatch. T. Droozi is almost undetectable by humans and animals, but is very sensitive to many pesticides and can be killed off quite easily, therefore the use of pesticides can worsen the elm span situation as you are killing their best known predator.
Pen State University has used T. Droozi, destroying 80% of elm Span worm in one season.
Elm span outbreaks mostly occur year-after year in urban areas where pesticides are used. The best fight against elm span would be for the entire community to ban together and stop using pesticides and perhaps work with local students and entomologists to bring the ecosystem back into balance by re-introducing the beneficial insects.
For the time being, you may also want to scrape off any eggs that you can before they hatch. Buy a pressure washer, and add some liquid soap such as Dr. Bronners and blast your trees.
Disrupting the ecosystem with chemicals NEVER solves the problem; it only causes stronger breakouts of more resistant insects.
Current provincial weather regulations:
-Wind must be between 2 and 15 km/hr for ground applications
-Winds must be between 2 and 10km/hr for trees taller than 3meters
-Air Temperature must be below 25oC
-It must not raining nor is rain anticipated over the next 2hour period
-The relative humidity must be above 50%
Where to report a violation