Effect of temperature on latent period of septoria leaf blotch on winter wheat under outdoor conditions

被引:68
作者
Lovell, DJ [1 ]
Hunter, T
Powers, SJ
Parker, SR
Van den Bosch, F
机构
[1] Rothamsted Res, Harpenden AL5 2JQ, Herts, England
[2] Long Ashton Res Stn, Bristol BS41 9AF, Avon, England
[3] ADAS High Mowthorpe, Malton YO17 8BP, N Yorkshire, England
关键词
epidemiology; latency; leaf blotch; Septoria tritici; thermal time;
D O I
10.1111/j.0032-0862.2004.00983.x
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Batches of two winter wheat cultivars (Riband and Apollo) were inoculated with conidia of Mycosphaerella graminicola at weekly intervals over a 2 year period. Following 72 h incubation, plants were placed in ambient temperatures ranging between -7 and 32degreesC with mean batch temperatures of 2.9-20.2degreesC. Latent period until the first visible symptoms ranged between 11 and 42 days. The relationship between development of lesions and accumulated thermal time was described using a shifted cumulative gamma distribution model. The model provided good estimates of lesion development with r(2)>0.92 for both cultivars. Base temperatures, below which the pathogen did not develop, were estimated from the model as approximately -2.4degreesC for the two cultivars. Latent period was estimated as being 250 and 301 degree-days above the estimated base temperature, when defined as time from inoculation to first lesion and time to 50% of maximal lesions, respectively, for cv. Riband. The values for cv. Apollo were similar, but with estimates of thermal time periods c. 5% higher. The relationship between mean temperature and inverse latent period, expressed as days either to first lesion or to 50% of maximal lesions, was best described by a linear regression with r(2)>0.96 for both cultivars. The opportunity for plants to outgrow disease was reduced when prolonged periods of cold temperature occurred, because the base temperature for growth of the pathogen was less than that for the crop.
引用
收藏
页码:170 / 181
页数:12
相关论文
共 34 条
[1]  
Abramowitz M, 1964, NBS APPL MATH SERIES, V55
[2]  
ARSENIJEVIC M, 1964, REV APPL MYCOLOGY, V45, P1349
[3]  
BERESFORD RM, 1988, Z PFLANZENK PFLANZEN, V95, P361
[4]  
Brain P., 1988, GENSTAT NEWSLETTER, V22, P38
[5]   REACTION OF WHEAT GENOTYPES TO SEPTORIA-TRITICI [J].
BROKENSHIRE, T .
ANNALS OF APPLIED BIOLOGY, 1976, 82 (03) :415-423
[6]   EFFECTS OF LEAF AGE, INOCULUM DOSE AND FREEZING ON DEVELOPMENT OF CHOCOLATE SPOT (BOTRYTIS-FABAE) LESIONS ON FIELD BEAN (VICIA-FABA) LEAVES [J].
CREIGHTON, NF ;
BAINBRIDGE, A ;
FITT, BDL .
JOURNAL OF PHYTOPATHOLOGY-PHYTOPATHOLOGISCHE ZEITSCHRIFT, 1986, 115 (02) :108-115
[7]  
Fraaije B. A., 2002, Plant Protection Science, V38, P421
[8]   PCR-based assays to assess wheat varietal resistance to blotch (Septoria tritici and Stagonospora nodorum) and rust (Puccinia striiformis and Puccinia recondita) diseases [J].
Fraaije, BA ;
Lovell, DJ ;
Coelho, JM ;
Baldwin, S ;
Hollomon, DW .
EUROPEAN JOURNAL OF PLANT PATHOLOGY, 2001, 107 (09) :905-917
[9]  
Genstat Committee, 1993, REF MAN GENST 5 REL
[10]   Agronomic and meteorological factors affecting the severity of leaf blotch caused by Mycosphaerella graminicola in commercial wheat crops in England [J].
Gladders, P ;
Paveley, ND ;
Barrie, IA ;
Hardwick, NV ;
Hims, MJ ;
Langton, S ;
Taylor, MC .
ANNALS OF APPLIED BIOLOGY, 2001, 138 (03) :301-311