Weekly Report

12 March 2021

City
Overall Risk
Tree Pollen
Grass Pollen
Weed Pollen
Mould Spores

Cape Town

Grass counts were low. Tree pollen found included eucalyptus (Myrtaceae), olive (Oleaceae), pine (Pinus), karee (Rhus), pepper tree (Schinus) and elm (Ulmaceae). Weed pollen types detected were the daisy family (Asteraceae), goosefoot (Chenopodiaceae), erica (Ericaceae), iris (Iridaceae), malva (Malvaceae), waxberry (Morella), English plantain (Plantago), buttercups (Ranunculaceae), fern spores (Polypodiaceae) and nettle (Urticaceae). Mould counts were low.

Johannesburg

Grass counts were moderate. Grass pollen detected included maize (Zea mays). Tree and weed counts were low. The tree pollen types detected were acacia (Acacia sp.), birch (Betula sp.), bush willow (Combretaceae), cypress (Cupressaceae), mulberry (Moraceae), eucalyptus (Myrtaceae) and pine (Pinus). Weed pollen types present in this sampling period were the carnation family (Caryophyllaceae), erica (Ericaceae), euphorbia (Euphorbiaceae), the jute family (Tiliaceae), goosefoot (Chenopodiaceae), fern (Polypodiaceae), sorrel (Rumex sp.) and pollen from the daisy family (Asteraceae). Mould counts were low.

Pretoria

The analysis for this sampling period was delayed, so last week’s findings are repeated here. Grasses were moderate. Low tree levels included Moraceae (mulberry) eucalyptus (Myrtaceae), kareeboom (Rhus) and Australian pine (Casuarina). Weeds were also low and the types detected were ragweed (Ambrosia), the daisy family (Asteraceae), goosefoot (Chenopdiaceae) and pellitory-of-the-wall (Parietaria). Moulds were low.

Bloemfontein

Grass counts were high. Tree counts were low and only acacia (Acacia sp.) pollen was detected. Weed counts were moderate and included pollen from the daisy family (Asteraceae) and goosefoot (Chenopodiaceae). Mould counts were low.

Kimberley

Grasses were moderate. Low tree pollen concentrations included pine (Pinaceae) and kareeboom (Searsia/Rhus). Weeds were low and the pollen types detected were the daisy family (Asteraceae), lilies (Liliaceae) and goosefoot (Chenopdiaceae). Moulds were low with strong spikes at times for Alternaria and Cladosporium.

Durban

Grass, tree and weed pollen concentrations were low. Grass pollen detected included maize (Zea mays). Tree types detected included mulberry (Moraceae), eucalyptus (Myrtaceae), elm (Ulmaceae) and the pea family (Fabaceae). Weeds/herbaceous shrubs included the daisy family (Asteraceae), erica (Ericaceae), goosefoot (Chenopodiaceae), ferns (Polypodiaceae), slangbos (Stoebe) and pellitory-of-the-wall (Parietaria). Moulds were high.

Gqeberha

Grasses were low. Tree levels were also low and included waxberry (Morella) and Australian pine (Casuarina). Low weed levels were seen and the types detected were lily (Liliaceae), sedges (Cyperaceae), goosefoot (Chenopodiaceae) and the carnation family (Caryophyllaceae). Moulds were low.

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