Competition between Typhula incarnata strains as a source of variation of Typhula blight in winter barley


  • CAVELIER, M. (1986). Competition between Typhula incarnata strains as a source of variation of Typhula blight in winter barley. Journal of Phytopathology, 116: (2),
Type Journal Article
Year 1986
Title Competition between Typhula incarnata strains as a source of variation of Typhula blight in winter barley
Journal Journal of Phytopathology
Recnumber 34
Volume 116
Issue 2
Endnote Keywords Barley|strains|Techniques|cereals|plant pathology|plant pathogenic fungi|inoculation|variations|
Abstract Several crosses between monokaryotic strs. of T. incarnata under lab. conditions gave rise to hypoaggressive dikaryons. Cold-hardened winter barley plants were more resistant to the aggressive strs. than unhardened ones and inoculation by sclerotia was not as efficient as by mycelium. Plants preinoculated in a cold chamber with the hypoaggressive strs. were fully protected against the harmful effects of the aggressive strs. inoculated 15 d later. Postinoculation with hypoaggressive strs., however, gave no control of primary infection due to aggressive strs., indicating the determinant role of the first infective str. upon the ultimate degree of attack. Under field conditions, a mixture of aggressive and hypoaggressive strs. produced an attack on winter barley seedlings which was intermediate between the severe one of the former and the almost indiscernable one of the latter str. (as measured by the dry wt. of infected plants before stem elongation and by the number of ears at harvest). In the cold chamber, mixed sclerotia from 2 equally aggressive strs. induced as much damage as each str. inoculated separately. The possible role of crosses between strs. is discussed.
Notes Cited Reference Count: 14 ref. Journal article English 9 tab.
Author address Sta. Phytopath. de l'Etat, Gembloux, Belgium.
Lien ://19861319179
Authors CAVELIER, M.