Weekly Report

13 August 2021

City
Overall Risk
Tree Pollen
Grass Pollen
Weed Pollen
Mould Spores

Cape Town

Grass and weed pollen levels were low. Tree pollen counts were moderate, and included gum (Myrtaceae), Australian pine (Casuarina sp.), pine (Pinaceae) and mulberry (Moraceae), with high levels of cypress (Cupressaceae) recorded. The weed pollen types detected were the daisy family (Asteraceae), ericas (Ericaceae), plantain (Plantago sp.), sedges (Cyperaceae) and nettles (Urticaceae). Mould levels were low.

Johannesburg

Grass and weed pollen counts were low, whereas tree pollen levels were moderate. The tree pollen found in this sampling period include acacia (Acacia sp.), ash (Fraxinus sp.), birch (Betula sp.), mulberry (Moraceae), gum tree (Myrtaceae), pine (Pinus sp.), plane (Platanus sp.) and poplar (Populus sp.), with high levels of cypress (Cupressaceae) detected. Weed pollen of the carnation family (Caryophyllaceae), goosefoot (Chenopodiaceae), the daisy family (Asteraceae), mallows (Malvaceae), plantain (Plantago sp.), ferns (Polypodiaceae), spurges (Euphorbia sp.), the jute family (Tiliaceae) and ericas (Ericaceae) were detected. Mould counts were low.

Pretoria

Tree, grass and weed pollen levels were low. Trees included birch (Betula sp.), karee (Rhus sp. / Searsia sp.), cypress (Cupressaceae) and pine (Pinaceae). Weeds included the carnation family (Caryophyllaceae) and the spurge family (Euphorbiaceae). Moulds were low.

Bloemfontein

Grass, weed and tree pollen counts were low.  Karee (Rhus sp. / Searsia sp.) was the only tree pollen detected. Weed pollen included the daisy family (Asteraceae), knotweed (Polygonaceae) and sedges (Cyperaceae). Mould levels were low.

Kimberley

Tree, grass and weed pollen levels were low. Only cypress (Cupressaceae) was detected of the tree pollen types. Weeds detected were slangbos ( Stoebe-type). Moulds levels were very low.

Durban

All pollen levels in the categories of trees, grasses and weeds were low. Tree pollen detected was pine (Pinaceae), cypress (Cupressaceae), birch (Betulaceae) and mulberry (Moraceae). Weed pollen detected included ferns (Polypodiaceae), the daisy family (Asteraceae), the carnation family (Caryophyllaceae) and knotweed (Polygonaceae). Moulds were low overall, but a significant spike that exceeded the threshold for Cladosporium was seen.

Gqeberha

Grass, tree and weed pollen counts were low. Tree pollen included gum (Myrtaceae), Australian pine (Casuarina sp.) and cedar (Pinaceae). The carnation family (Caryophyllaceae) was the only weed pollen detected. Mould counts were low.

 

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