|Title||Onderzoekingen over Colletotrichum lindemuthianum (Sac. et Magn.) Bri. et Cav. en Gloeosporium fructigenum Berk. forma Hollandica nova forma|
|Source||University. Promotor(en): H.M. Quanjer. - Wageningen : Veenman - 94|
|Publication type||Dissertation, internally prepared|
|Keyword(s)||colletotrichum lindemuthianum - plantenziekteverwekkende schimmels - melanconiales - glomerella cingulata - deuteromycotina - plant pathogenic fungi|
|Categories||Plant Pathogenic Fungi|
|Abstract||From diseased pods of Phaseolus vulgaris, 4 strains were isolated of Colletotrichum lindemuthianum: Z I and Z II from Zeeland; E from Enkhuizen; W from Westland. The strains differed from the American strainsβandγ. Tests on bean varieties used by Leach suggested that Z strains were related to form VIII of Leach and strains E and W were identical with forms IV and V. The Dutch strains differed in both severity and manner of attack on test varieties of bean, and in lethal and optimum temperatures. The fungus overwintered in the soil and could survive severe cold, -15° or -20 °C, for 10 days. Especially in light, cultures at least 2.5 months old produced perithecium-like bodies containing structures resembling asci.
From diseased pods of P. multiflorus growing under apple-trees, a strain (K) was isolated and identified as Gloeosporium fructigenum because it attacked apples but was only mildly pathogenic on a few varieties of P. vulgaris. It was named f. hollandica because it was distinct from the forms germanica and americana. Passage of K through apple or tomato increased its virulence to them, while passage through P. vulgaris decreased virulence to fruit and increased that to bean. After adaptation to apple, properties of strain K on tomato was the same as C. lindemuthianum.