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Thresholds for control of Septoria spp. in winter wheat based on precipitation and growth stage
Author(s) -
HANSEN J. G.,
SECHER B. J. M.,
JØRGENSEN L. N.,
WELLING B.
Publication year - 1994
Publication title -
plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 85
eISSN - 1365-3059
pISSN - 0032-0862
DOI - 10.1111/j.1365-3059.1994.tb00569.x
Subject(s) - septoria , fungicide , biology , precipitation , yield (engineering) , winter wheat , mycosphaerella graminicola , agronomy , growing season , horticulture , botany , meteorology , geography , metallurgy , materials science
A simple forecasting model for Septoria spp. in winter wheat was developed based on historical data (1980–89) including precipitation, growth stage, disease severity and yield response to fungicide treatments. The number of days with precipitation ≥ 1 mm, calculated during a 30‐day period starting at the beginning of stem elongation (GS 32), correlated well with attacks of Septoria spp. later in the season and with the yield response in trials with fungicide treatments. Seven or 8 days with rainfall ≥ 1 mm was suggested as a threshold for Septoria treatment. Model development and possible further improvements are discussed.