The occurrence of Lasiodiplodia theobromae on Pinus elliottii seeds in South Africa
1995
Cilliers, A.J. (Grain Crops Inst., Potchefstroom (South Africa)) | Swart, W.J. | Wingfield, M.J.
Seeds of Pinus elliottii from clonal seed orchards in South Africa were examined in order to determine the cause of black discolouration and reduced germination prevalent in many seedlots. Symptomatic seeds were found to contain internal fungi, whereas asymptomatic seeds showed no signs of fungal colonisation. Isolations were made from immature seeds in one-year-old cones and from seeds in mature two-year-old cones. Lasiodiplodia theobromae was identified as the predominant fungus present on symptomatic seeds. It was also isolated in relatively high percentages from mature cones, even though it was not commonly isolated from one-year-old cones
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