Weekly Report

26 September 2019

City
Overall Risk
Tree Pollen
Grass Pollen
Weed Pollen
Mould Spores

Cape Town

Grass concentrations increased to exceed 10 grains/cu M on warm, dry days. Tree pollen increased despite rain as significant concentrations were recorded for cypress, plane,pine,oak and olive. Weeds were low. Fungal spores were low in total but a strong spike was seen for Alternaria. This spore exceeded the significant level on dry days of the sampling period.

Johannesburg

Tree pollen is high. Oak pollen has increased and plane, mulberry and Fraxinus were moderate. Grasses and weeds were low as were mould levels.

Bloemfontein

Fungal spore loads remain low. Tree pollen is still high as Celtis (white stinkwood) Olive, Pine, Eucalyptus, Buddleja and Combretum (Bush Willow) continue to flower. Grass pollen is high but lower than the previous week. No weed pollen was detected.

Durban

Fungal spore concentrations were moderate due to a large spike for ascospores but pollen levels receded to low score. Low numbers of grass, tree (Pine, plane, mulberry and birch and weed (English Plantain) were detected.

Pretoria

Tree pollen remains high as mulberry,plane and oak continue to flower. Grasses and weeds are low as are moulds.

Gqeberha

The fungal spore load increased probably following rain and a spike was seen for ascospores but the overall count was low. Tree, grass and weed pollen levels were low, but pine plane, olive and mulberry tree pollen appeared as did the weed pollen chenopod (fat hen) and Erica.

Kimberley

Fungal spore levels were low, grasses were present but low and tree pollen is low but increasing slightly as gum, mulberry, white stinkwood and pine flower. Weed pollen was low, but occasional grains of chenopod (fat hen) and English Plantain were seen.

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