Infection of Pinus Radiata Foliage by Scirrhia Pini

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Date
1972
Authors
Ivory M. H.
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Abstract
The process of conidium germination, on glass and on foliage of Pinus radiata, is described for Scirrhia pini Funk & Parker. Penetration and subsequent development within the host tissues is described and compared with similar studies in New Zealand and the U.S.A. Symptoms appeared after 32 days in the warmest months of the year and 67 days in the colder months. Conidium germination and stoma entry were observed from 50 to 260 with the optimum for both processes at about 17 o. Micro-organisms isolated from the phyllosphere of P. radiata were rarely antagonistic to S. pini in culture, and had no significant effect on disease development.
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East African Agricultural And Forestry Journal, 3, p. 365-375