Weekly Report

13 March 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

All pollen and mould types were low at this sampling site. Trees were low and were represented only by pine and waxberry. Weeds were similarly low and included the daisy family, goosefoot and Erica. Moulds were low.

Johannesburg

Grass concentrations were moderate throughout this sampling week occurring >10 per day. Trees were very low and included the types: cypress, Pinus and eucalyptus. Weeds were similarly very low and only Chenopodiaceace (Goosefoot) and Asteraceae were detected. Moulds were generally low, but some significant levels were detected for Alternaria.

Pretoria

Grass concentrations were moderate to high throughout the week again occurring >10 per day. Trees were low and included the types: eucalyptus, cypress, pine and mulberry. Low weed concentrations included: Chenopodiaceace (Goosefoot) and the daisy family. Moulds were generally low but occasional high counts for Alternaria were detected.

Bloemfontein

Grass pollen levels were consistently high to very high. Tree pollen was low and included olive, cypress, Buddleja, pine and rhus/Searsia. Weeds were low and the types identified were the daisy family and goosefoot. Moulds were low, excluding Alternaria, an allergenic spore. The Alternaria levels were mostly high throughout this sampling week.

Kimberley

Grass levels were moderate to high throughout this sampling week. No tree pollen was detected and weed pollen levels were low, the types included the daisy family only.

Durban

Grass levels were moderate, having increased since last week. Tree loads were also higher relative to the previous week, with birch and eucalyptus recorded. Weed levels were low and included low counts of ragweed. Moulds increased since last week.

Port Elizabeth

Grass levels were low at this site. Tree levels were similarly low consisting of waxberry, gum and olive. Low weed levels were detected, and the types were the daisy family, goosefoot and ferns. Moulds were high as ascospores increased sharply at the end of the sampling week following rain.

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