Weekly Report

11 September 2020

City
Overall Risk
Tree Pollen
Grass Pollen
Weed Pollen
Mould Spores
Cape Town
Johannesburg
Bloemfontein
Durban
Pretoria
Port Elizabeth
Kimberley

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Cape Town

High tree levels were detected for cypress despite heavy rain. Other flowering trees were: pine, plane, oak and white mulberry. Grasses were low. Low weed levels included Erica and Stoebe. Fungal spores increased as sunny days followed rain and high levels were detected.

Johannesburg

Tree levels were high as plane and white mulberry dominated the tree counts. Other tree types detected were Casuarina, Araucaria (Captain Cook pine similar to Norfolk pine), cypress, birch, ash, pine and gum. Low weed levels included sedge, goosefoot, Euphorbia, Erica, Caryophyllaceae, the pink or carnation family and nightshade. Mould levels were low.

Pretoria:

High tree loads were dominated by white mulberry. Other trees detected were bush willow, plane, pine, yellowwood, oak, cypress, plane, ash, birch and Casuarina. Grasses and weeds (the pink or carnation family) were low. Mould levels were extremely low.

Bloemfontein

Very high tree levels were detected with significant counts for cypress, ash, plane, gum and pine. White mulberry, oak, yellowwood, poplar, willow and mesquite were detected in lower amounts. Grasses were low. Low weeds included the daisy family and erica. Mould levels were very low except for one spike for Pleospora, the wet air spore.

Kimberley

Tree levels are increasing and significant counts were seen for cypress and white mulberry. Other tree pollen detected included ash, pine, plane, pecan, birch and poplar. Low weed levels were seen and only goosefoot was detected. No grass pollen was observed and mould levels were low.

Durban

Fungal spore levels were significant as the allergenic spore Cladosporium reached high levels. Grasses were low. Weeds were low and only ferns and Euphorbia were detected. Low tree levels included white mulberry, pine, birch, poplar and cypress.

Port Elizabeth

Grasses were low, tree pollen was low and the types detected were acacia, Casuarina, cypress, olive and pine. Low weed levels included the daisy family, sedge, the pink or carnation family and Euphorbia. Mould levels were low.

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