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Predominant Pollen and Spores

Moncton, New Brunswick

Tree pollen and spore seasons fluctuate from year to year by as much as two to four weeks at this site due to the effect of weather. The pollen and spore seasons described here are generalizations as to when pollination/sporulation occurs.

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Predominant Pollen for Moncton, New Brunswick

Tree pollen seasons fluctuate from year to year by as much as two to four weeks at this site due to the effect of weather. The pollen seasons described here are generalizations as to when pollination occurs.

Alder (Alnus sp.)
Alder season varies greatly from year to year and can be the result of the effect of weather and cyclical patterns. The counts vary from low to high. There is a small early season with low counts from mid to late March. The main season can start from the third week of March to the second week of April and end the first to the last week of June. They are considered to be important allergens.
Ash (Fraxinus sp.)
Ash season can start from the third week of April to early May and ends the third week of May to almost mid-June. Most counts are low with an occasional moderate count observed. May cause allergic reactions.
Beech (Fagus sp.)
Beech season can vary from year to year due to cyclical patterns and the effect of weather. Low counts are generally observed. The season can start the first to the third week of May and end the third week of May to mid-June.
Birch (Betula sp.)
Birch season can start from mid-April to early May and end early to late June. Very high counts are observed. They are considered important allergens.
Cedars, Junipers and Yew (Cupressaceae family)
Cedars, junipers and yews can produce high counts from April to early May. There is a short season mid to late March. The main season can start from the third week of March to mid-April and end late May to the second week of June.
Elm (Ulmus sp.)
Elm season and pollen levels is very dependent on the site location. An early low season can occur from mid to late March. The main season can have moderate and occasional high counts, depending on the site location. Season start is from the first to the third week of April and ends late April to the second week of May.
Grasses (Gramineae family)
Highest counts for the grass season occur from mid-June to the third week of July. The season can start from the second to the third week of May and end late September to early October. They are considered important allergens.
Hemlock (Tsuga sp.)
Hemlocks season can vary from year to year due to cyclical patterns and the effect of weather. Some years only low sporadic counts are observed, other years moderate counts are possible. The season can start the third week of May to the end of may and end the first to the third week of June.
Larch (Larix sp.)

Larch and tamarack can vary a great deal from year to year due to the effect of weather and cyclical patterns. Most years only low counts are observed while other years moderate counts are possible. The season can start from the third week of April to early May and end the first to the third week of May.

Maple (Acer sp.)
Maple season is effected by the weather in when it will occur and how much pollen will be released. The main season, where low to high counts will be observed, lasts almost two months. The season can start late March to mid-April and end late May to mid-June. Very high counts are observed and some species are known to cause allergic reactions.
Nettles (Urticaceae sp.)
Nettles occur only in low numbers. The season can start late June to early July and end late August to mid-September. They are considered important allergens due to their small size.
Oak (Quercus sp.)
Oak season varies a great deal from year to year due to the effect of weather. An early short season may occur from late April to mid-May. The more stable season with moderate and low counts can occur from the second to the last week of May. Some species are known to cause allergic reactions.
Pine, fir and spruce (Pinaceae family)
Pine, fir and spruceseason lasts more than two months with very high counts observed. The season can start from the first to the third week of May and end the first to the third week of July. They are very important allergens for those individuals who are sensitized.
Plantains (Plantago sp.)
Plantain season can start from the first to the third week of June and end the third week of September to early October. The counts are in the low range but they may cause allergic reactions in highly sensitized individuals.
Poplar, cottonwood and aspen (Populus sp.)
Poplar and aspen season lasts well over a month. The season can start late March to mid-April and end early May to the last week of May. Some very high counts are observed and they can cause allergic reactions at these levels.
Ragweed (Ambrosia sp.)
Ragweed season can start from the third week of July to early August and lasts until mid-October or until a hard frost occurs. Mostly low counts are observed with the occasional moderate counts possible.
Willow (Salix sp.)
Willow season can be sporadic with mostly low and rare moderate counts. During warm springs like 201 and 2012 the season can start the second week of April. Generally the season starts the third week of April to early May and ends the third week of May. May cause allergic reactions in highly sensitized individuals.

Predominant Spores for Moncton, New Brunswick

Spore seasons fluctuate from year to year by as much as two to four weeks at this site due to the effect of weather. Spores described here are generalizations as to when sporulation occurs.

Alternaria sp.

Most of the significant counts of alternaria are found from mid-June to the end of September.

Aspergillus sp.

Significant counts of aspergillus occur throughout the whole counting season with high counts occurring from late May to early October.

Boletus sp.

Boletus season is from mid-June to mid-October and very high counts can occur. Considered an important allergen.

Botrytis sp.

Botrytis counts are very sporadic. They can occur in the moderate ranges from late April to October. Possible cause of allergies. The fact that it is found in food is also a method that it could cause allergic sensitivity. May be associated with corneal trauma and infections as it is found in the scrapings.

Caloplaca sp.

Moderate and high counts of caloplaca are observed from April to early October. The counts are very sporadic.

Cladosporium sp.

Cladosporium is found throughout the whole counting season. The highest counts are observed from late March to early October. Certain species can cause deep skin infections and can invade the central nervous system. They can cause sinusitis, respiratory diseases, and subcutaneous mycoses. May also cause keratomycosis and allergies.

Coprinus sp.

Very high counts of Coprinus are observed. Season is from mid-May to late fall. Very high counts are observed from July to Mid-October. Coprinus is considered an important allergen.

Diatrypaceae sp.

Diatrypaceae counts are very sporadic and vary throughout the whole counting season. They are not known to cause allergic reactions.

Epicoccum sp.

Moderate counts of epicoccum are observed from mid-July to early October.Can be the cause of allergies (hay fever and asthma).

Erysiphe (Oospora) sp.

Erysiphe, also know as powdery mildew, season with significant counts runs generally from late April to mid-October. Highest counts are mostly in the moderate range.

Fusarium sp.

Fusarium counts are very sporadic throughout the whole counting season. The majority of the season occurs from May to mid-October with some high counts. It is known to cause allergic reactions.
May be important source of health problems since large numbers do get airborne and they are a common food contaminant. Some species produce potent toxins and when infected food is ingested it can affect the following systems: circulatory, alimentary, skin and nervous. This can also be caused by inhalation of the spores.

Ganoderma sp.

Very high counts of Ganoderma are observed from mid-June to late fall. Considered an important allergen.

Helicomyces sp.

Helicomyces counts fluctuate throughout the season with low to high counts from late April to mid-October.Considered to be saprophytic.

Leptosphaeria sp.

Leptosphaeria season is the end of May to mid-October with great fluctuations in counts from day to day. This is probably due to the effect of weather. The significant counts are mostly in the moderate range.

Myxomycetes

Moderate counts of myxomycetes are observed from mid-June to late September.

Penicillium sp.

Significant counts of Penicillium occur throughout the whole counting season with high counts occurring from late May to early October.

Pithomyces sp.

Moderate counts of pithomyces are observed in August and September. Etiologic agent in immune-compromised patients. Can cause disease in animals. Allergenicity not well established.

Polythrincium sp.

Moderate counts of polythrincium are observed from July to late September.

Uredinales sp.

Uredinales also know as rusts, produce low and moderate numbers from mid-May to mid-October.

Ustilaginales sp.

Ustilaginales or smuts produce low and moderate counts from late May to mid-October.

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