Weekly Report

31 December 2020

City
Overall Risk
Tree Pollen
Grass Pollen
Weed Pollen
Mould Spores

Due to logistical challenges related to the Covid-19 pandemic, count data from the same week in 2019 were used for this week’s report except for Cape Town where current data is displayed.       

Cape Town

Moderate grass levels were obtained at times. Trees were low and included pine (Pinus), gum (Myrtus), waxberry (Morella), and white stinkwood (Celtis). Weeds were low and dandelion (Taraxacum) the daisy family (Asteraceae), English Plantain (Plantago) slangbos (Stoebe) Erica (Ericaceae) and sedge (Cyperus) were detected. Moulds were low with small spikes for Alternaria and Cladosporium following rain.

Johannesburg

No detailed analysis available.

Pretoria

No detailed analysis available.

Bloemfontein

Pollen levels in the categories: trees, grass and weeds were all low. Tree types included birch eucalyptus, white stinkwood and Casuarina. Only fern spores were detected in the weed pollen category. Mould levels were generally low but increased in response to rain and ascospores were seen in higher numbers.

Kimberley

All mould and pollen levels were very low during this sampling period of high temperatures and no rain. Only grass pollen was detected.

Durban

High levels of mould spores were seen during this humid sampling week. Ascospores and Cladosporium reached high levels and basidiospores and Epicoccum levels increased. Grass counts were low as were tree pollen levels. Casuarina, birch (Betula)  gum (Myrtus), pine (Pinus) and white stinkwood (Celtis). Low levels of weed pollen were detected and these were: goosefoot (Chenopod), fern (Polypod) , daisy (ASteraceae) and Apiaceae of the carrot, celery and parsley family pollen.

Port Elizabeth

No detailed analysis available.

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