Cape Town
Pollen counts decreased sharply during this warm, dry and windy week. Grasses, trees and weeds were all low. Trees detected included ash (Fraxinus), cypress (Cupressaceae), olive (Oleaceae), pine (Pinaceae), oak (Quercus) linden (Tilia) karee (Rhus/Searsia) and gum (Myrtaceae). Weeds were goosefoot (Chenopodiaceae), sedges (Cyperaceae), plantain (Plantaginaceae), nettles (Urticaceae) and erica (Ericaceae). Moulds were low.
Calvinia
This site is not operational
Johannesburg
This site is not operating so four year averages are given here. Grasses are likely to be low, tree pollen would be bushwillow (Combretaceae), plane (Platanaceae), poplar (Populaceae), gum (Myrtaceae), oak (Quercus) and mulberry (Moraceae). Weeds are likely to be the carnation family (Caryophyllaceae) and spurges (Euphorbiaceae).
Pretoria
This site is operating but the pollen strip has not reached the laboratory. Four-year averages are shown and trees are likely to be Acacia, bushwillow (Combretaceae), hackberry (Celtis), gum (Myrtaceae), olive (Oleaceae), waxberry (Morella), mulberry (Moraceae) and yellowwood (Podocarpus). Weeds seen at this time of the year are the daisy family (Asteraceae), knotweeds (Polygonaceae), sedges (Cyperaceae), protea and spurges (Euphorbiaceae).
Bloemfontein
Grasses were low. Low trees included Bushwillow (Combretaceae), cypress (Cupressaceae), ash (Fraxinus), gum (Myrtaceae), olive (Oleaceae) pine (Pinaceae), poplar (Populaceae) and karee (Rhus/Searsia). Weeds were the daisy family (Asteraceae) and sedges (Cyperaceae). Moulds were low but have increased when compared to previous weeks.
Kimberley
Pollen concentrations were low, but a greater variety of tree taxa appeared in the air. Grasses are gradually increasing. Trees detected included bushwillow (Combretaceae), pecan (Carya), cypress (Cupressaceae), pine (Pinaceae), olive (Oleaceae), gum (Myrtaceae), the sumac family) Anacardiaceae), linden (Tilia), karee (Rhus/Searsia), mulberry (Moraceae) and oak (Quercus). Weeds were the carnation family (Caryophyllaceae), goosefoot (Chenopodiaceae), English plantain (Plantaginaceae), the daisy family (Asteraceae), spurges (Euphorbiaceae), sedges (Cyperaceae) and protea (Proteaceae). Moulds were low.
Durban
Tree, grass and weed pollen was low. Trees included birch (Betulus), cypress (Cupressaceae), mulberry (Moraceae), olive (Oleaceae), Australian pine (Casuarina), pine (Pinaceae) and white stinkwood (Celtis africana). Weeds were bulrush (Typhaceae), sedges (Cyperaceae), the daisy family (Asteraceae), ferns (Polypodiaceae), English plantain (Plantaginaceae), nettles (Urticaceae) and sorrel (Rumex ). Moulds were low, but close to the significant threshold.
Gqeberha
The results are delayed and will be updated. Meanwhile the findings from the previous week are repeated.
Potchefstroom
No weed or grass pollen was detected at this site. Trees were olive (Oleaceae) and gum) (Myrtaceae) and moulds were very low.
George
Grasses were low until the last day of this week when they increased to moderate levels. Low tree concentrations included gum (Myrtaceae), poplar (Populaceae), pine (Pinaceae), Australian pine (Casuarina), cypress (Cupressaceae), karee (Rhus/Searsia) and willow (Salix). Weeds were sedges (Cyperaceae), the daisy family (Asteraceae), English plantain (Plantaginaceae), Pellitory-of-the-wall (Parietaria), ferns (Polypodiaceae) and sorrel (Rumex). Moulds were low.
