Premium
Die Entwicklung der Ramulatia‐Blattfleckenkrankheit der Zuckerrübe: Einfluß der Temperatur und des Alters der Wirtspflanze
Author(s) -
Hestbjerg H.,
Wolffhechel H.,
Dissjng H.
Publication year - 1994
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/j.1439-0434.1994.tb00611.x
Subject(s) - biology , sugar beet , inoculation , leaf spot , incubation period , incubation , sugar , horticulture , host (biology) , botany , agronomy , food science , ecology , biochemistry
A method of inoculating sugar beet plants ( Beta vulgaris L.) with Ramularia beticola Faut. & Lamb, is described. Following inoculation, disease development in relation to temperature and plant age was studied for more than a month. The incubation period was 18 days at 10°C compared to 14 days at 17°C. At 25°C no symptoms appeared. Both temperature and plant age significantly influenced disease level and rate of disease development. Plants incubated at 17°C were more severely diseased 33 days after inoculation than plants incubated at 10°C. Young plants (3 weeks at inoculation) Were more susceptible than older plants (5 and 8 weeks at inoculatson) under growth chamber conditions. In the field, symptoms of Ramularia leaf spot appear relatively late in the season and young leaves are rarely attacked. The inconsistency of these observations is discussed.