Weekly Report

5 February 2021

City
Overall Risk
Tree Pollen
Grass Pollen
Weed Pollen
Mould Spores

Cape Town

Grasses were low but showed a slight increase from previous weeks. Tree pollen levels were also low, with palm tree (Arecaceae), gum tree (Eucalyptus), pepper tree (Schinus sp.) and kareeboom (Rhus/Searsia) detected. Weed pollen of the daisy family (Asteraceae), goosefoot (Chenopodiaceae), erica (Ericaceae), waxberry (Myricaceae), English plantain (Plantago), slangbos (Stoebe), nettle (Urticaceae) and Erodium (Geraniaceae) were present at low levels. Overall mould levels were low.

Johannesburg

Very heavy rain stopped the spore trap after day 3 so the sum was estimated from averages. Low grass and tree levels were seen and of the trees only eucalyptus (Myrtaceae) pollen was detected. Low weed pollen included goosefoot (Chenopodiaceae), ferns (Polypodiaceae) and English plantain. Moulds levels were low.

Pretoria

Only four days of this sampling week could be read. Just one grass pollen grain was seen during this period of heavy rain. No tree or weed pollen was detected. Moulds were moderate to high with strong spikes for Cladosporium, ascospores and basidiospores.

Bloemfontein

Grasses were moderate with occasional high concentrations. Trees were low and the types detected were pine (Pinaceae), Australian pine (Casuarina) Acacia and waxberry (Morella). Weed levels were low and included English plantain (Plantaginaceae), protea (Proteaceae), ferns (Polypodiaceae), the daisy family (Asteraceae), goosefoot (Chenopdiaceae) and mallows (Malvaceae).

Kimberley

Grass pollen counts were moderate to high. Tree and weed counts were very low, with only pollen from the daisy family (Asteraceae), nettles (Urticaceae), ferns (Polypodiaceae) and goosefoot (Chenopodiaceae) detected. Moulds levels were low.

Durban

Grasses were low. Trees levels were low and included birch (Betula), persimmon (Ebenaceae), white stinkwood (Celtis), yellowwood (Podocarpus), and palm (Arecaceae). Weeds were low and the types detected were sedges (Cyperaceae), goosefoot (Chenopodiaceae), ferns (Polypodiaceae) and the daisy family. Moulds were consistently high with strong spikes for ascospores, basidiospores and Cladosporium.

Port Elizabeth

Grass and tree levels were low. The only tree pollen detected was waxberry (Morella). Low weed pollen included sedges (Cyperaceae) protea (Proteaceae) and slangbos (Stoebe). Mould levels were consistently low.

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