Weekly Report

18 September 2020

City
Overall Risk
Tree Pollen
Grass Pollen
Weed Pollen
Mould Spores

Cape Town

The spore trap motor has suffered storm damage. 10-year averages are given and flowering trees in the second week of September include: oak, white stinkwood, pine, yellowwood, mulberry, olive and cypress. Weeds are found in low numbers and include sorrel, goosefoot and daisy. Mould levels are generally low but increase on sunny days following rain.

Johannesburg

Tree counts were high mainly due to the contributions of white mulberry, birch plane and oak. Other flowering tree types were cypress, gum, white stinkwood, ash, pine, yellowwood, poplar and Rhus/Searsia. Low weed levels included goosefoot, nightshade, the daisy family, the pink or carnation family, Euphorbia and ferns. Mould levels were low.

Pretoria

Tree levels were high and the types included white mulberry, white stinkwood, pine, yellowwood, poplar and cypress. No grass or weed pollen was detected. Moulds were extremely low.

Bloemfontein

Tree levels were high as high levels were recorded for Buddleja and plane and moderate levels were recorded for pine and white stinkwood. Other flowering trees included yellowwood, poplar, Rhus/Searsia and white mulberry. Weed counts were very low and only Stoebe (slangbos) was detected. Mould levels were extremely low.

Kimberley

Tree pollen increased as pine, yellowwood, gum, mesquite, pecan, Buddleja, ash, poplar, plane and cypress flowered. Grass pollen levels were very low, Weeds were low and only pollen from the daisy family was detected. Mould levels were very low.

Durban

Tree pollen levels remained low but the variety of flowering trees increased. Pine, pecan, cypress, mesquite, Rhus, poplar, white mulberry, birch and white stinkwood are all flowering now. The only weed pollen detected was Stoebe (slangbos). Grass levels were low. Moulds were high as Cladosporium, an allergenic fungal spore, increased.

Port Elizabeth

Tree pollen was low and included the types: acacia, cypress, waxberry, olive, pine and cedar. Grasses were low. Weed pollen was very low but mugwort, the daisy family, sedges, Erica and goosefoot were detected. Mould levels were very low.

 

 

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