Well, the outdoor allergy season is almost over and we will soon be finished doing collections and providing information to the public through our reports that we produce.
The pollen in the air is generally at low levels or even absent on many days now. But people may still be suffering for a while in some areas where the temperatures will be remaining high enough for the fungal spores to continue growing and releasing the spores in the air. (more…)
This cold spring brought a late season for the trees but this does not have any impact on what is going to happen in August and the fall for outdoor pollen and mold spores. There are many weeds that cause seasonal allergies. Some of them include plantain, nettles, ragweed and others. But only weeds that are mostly or partially air pollinated are included in outdoor air samples. The weeds do not include ones that have a strong smell, colourful flowers or do not get airborne (Dandelion). These other weeds can cause allergic reactions but only on contact with the skin. (more…)
We hear it all the time. When will winter be over? Well not only are people saying it but so are the trees.
This winter the March weather has been very cold with lots of snow. April has begun with very cold temperatures as well and the temperatures are warming up very slowly. The sampler at our site in Ottawa on April 6th is still surrounded by snow. The winter snow cover is good for the trees since it provides protection for them during the cold winter months. What they don’t like is a stretch of warm weather in the spring followed by a cold snap for several days or even weeks. This can fool the trees into budding and it can have a profound effect on the pollen season to the point of almost eliminating it if the trees have started budding. We don’t have that problem this year so far. (more…)