Weekly Report

10 January 2020

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

Kimberley

Pollen levels remained very low and low grass, tree (olive and Casuarina) and weeds (ferns) were seen. Mould levels were low. The fungal spore (mould),Alternaria , increased after slight rain and approached but did not exceed the significant threshold.

Port Elizabeth

Grass counts were low at this sampling site. Tree pollen levels were low and included: Casuarina and pine. Weed pollen consisted of daisy only. Mould counts were uniformly low.

Cape Town

Pollen and mould levels were low during this sampling period of warm, dry, weather with only slight rain in some areas of Cape Town. Grass levels were low as were trees (Eucalyptus, pine, Rhus and Casuarina) and weeds (English Plantain, Protea and Apiaceae, the celery carrot and parsley family) Mould levels were extremely low.

Bloemfontein

Grass counts increased at this site and although the mean count remained below the threshold, significant counts were detected on some days. Trees flowered strongly following rain and the following trees were identified: Olive, oak, rhus/Searsia, acacia, buddleja and white stinkwood. In the weed/herbaceous shrub category, only daisy pollen was observed. Moulds remained low.

Pretoria

No pollen counts are available for this city as the site was inaccessible over the holiday period.

Johannesburg

Significant levels were seen for grass pollen during this sampling week. Tree pollen increased slightly and included Acacia, Casuarina, Cypress, mulberry, olive, yellowwood, plane, jacaranda and weeping willow. Weed pollen was low and included: English Plantain, goosefoot, daisy and Stoebe, a shrub of the daisy family. Mould levels were low.

Durban

High mould counts were detected during a sampling week of humidity levels >85%. Very high ascospore levels were seen and basidiospores, Epicoccum and Cladosporium levels increased. Grasses increased and although the average daily count was low, the count exceeded the significant threshold at times. Tree pollen increased and included: birch, rhus, acacia, white stinkwood and olive. Weed pollen levels also increased as daisy, ferns and Parietaria were seen.

 

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