Article (Scientific journals)
Operational warning for Septoria leaf blotch and leaf rust in winter wheat: Importance of fungicide dosage, formulation, and spray time
El Jarroudi, Moussa; Kouadio, Amani Louis; Beyer, Marco et al.
2013In Phytopathology, 103, p. 38
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Keywords :
Crop disease; Triazole; Strobilurin; Yield; Winter wheat
Abstract :
[en] Field experiments were conducted in 2010 to investigate the effect of fungicide commercial formulation, timing and dosages on the severity of these two diseases in winter wheat in Luxembourg. Different types of fungicides and fungicide combinations containing active ingredients such as triazoles and strobilurins were used in field trials including susceptible cultivars to Septoria leaf blotch (SLB, caused by Septoria tritici) and wheat leaf rust (WLR, caused by Puccinia triticina). The three formulations of fungicides tested were: (i) a mix of triazole and amine (Prothioconazole 250 g/l + Spiroxamine 500 g/l) associated with chlorothalonil 500 g/l, (ii) sole strobilurin (Azoxystrobine 250 g/l), and (iii) a mix of strobilurin and triazole (Epoxiconazole 125 g/l; Azoxystrobine 250 g/l). The optimum time of fungicide spray was assessed through the mechanistic model PROCULTURE and a stochastic model based on night favourable weather conditions conducive to WLR development. The results showed that for plots treated with fungicide formulation containing either a triazole or a strobilurin, the grain yield earned was not significantly different from the untreated plots (P > 0.05). Whereas single fungicide treatment involving a mixture of triazole and strobilurin at the optimum time gave an earning (on average 7 dt ha-1) compare to the control and a yield similar to that obtained with the double or triple fungicide treatments.
Research center :
Centre de Recherche Public Gabriel Lippmann
Disciplines :
Agriculture & agronomy
Author, co-author :
El Jarroudi, Moussa  ;  Université de Liège - ULiège > DER Sc. et gest. de l'environnement (Arlon Campus Environ.) > DER Sc. et gest. de l'environnement (Arlon Campus Environ.)
Kouadio, Amani Louis 
Beyer, Marco
Tychon, Bernard ;  Université de Liège - ULiège > DER Sc. et gest. de l'environnement (Arlon Campus Environ.) > Agrométéorologie (relation agriculture-environ. physique)
Delfosse, Philippe
Language :
English
Title :
Operational warning for Septoria leaf blotch and leaf rust in winter wheat: Importance of fungicide dosage, formulation, and spray time
Publication date :
June 2013
Journal title :
Phytopathology
ISSN :
0031-949X
eISSN :
1943-7684
Publisher :
American Phytopathological Society, United States
Volume :
103
Pages :
38
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
Sentinelle
Funders :
ASTA - Administration des Services Techniques de l'Agriculture [LU]
Available on ORBi :
since 29 June 2013

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