The interacting effects of temperature, duration of wetness and inoculum size on the infection of pear blossoms by Erwinia amylovora, the causal agent of fire blight

被引:9
作者
Shwartz, H [1 ]
Shtienberg, D [1 ]
Vintal, H [1 ]
Kritzman, G [1 ]
机构
[1] Agr Res Org, Volcani Ctr, Dept Plant Pathol, IL-50250 Bet Dagan, Israel
关键词
epidemiology; Erwinia amylovora; disease management;
D O I
10.1007/BF02980788
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Pear blossoms are the plant tissue that is most vulnerable to infection by Erwinia amylovora (Burrill) Winslow et al., the causal agent of fire blight. The interacting effects of temperature, wetness duration and inoculum size on the development of fire blight symptoms in detached pear blossoms were determined in three sets of experiments conducted under controlled conditions. It was expected that this information would facilitate the improvement of a warning system used in fire blight management. Results of the ANOVA tests of the data revealed highly significant interactions among the factors tested. The factors that contributed most to disease incidence were temperature and inoculum size; effects of wetness duration were significant in some cases, but that effect was small. It was further demonstrated that the effects of the interaction of these factors on the incidence of blossom infection may be understood in terms of the general concept of compensation. According to this concept, conditions highly favorable for one of the factors essential for pathogen development may compensate for other factors, for which the conditions are less favorable. As a result of the complex interactions observed between the biotic and abiotic factors, because of compensation relationships and because some of the factors cannot be estimated adequately (for example, inoculum level), it was concluded that it is not yet possible to improve fire blight management by using data on the quantitative relationships between biotic and abiotic factors.
引用
收藏
页码:174 / 187
页数:14
相关论文
共 24 条
[1]   Bacterial colonization of leaves: A spectrum of strategies [J].
Beattie, GA ;
Lindow, SE .
PHYTOPATHOLOGY, 1999, 89 (05) :353-359
[2]  
Billing E., 1996, Acta Horticulturae, P121
[3]  
Billing E, 1999, ACTA HORTIC, V489, P399
[4]   EFFECT OF TEMPERATURE ON GROWTH OF FIREBLIGHT PATHOGEN, ERWINIA-AMYLOVORA [J].
BILLING, E .
JOURNAL OF APPLIED BACTERIOLOGY, 1974, 37 (04) :643-648
[5]  
Gouk S. C., 1996, Phytopathology, V86, pS42
[6]  
Gouk SC, 1999, ACTA HORTIC, V489, P525
[7]   SCANNING ELECTRON-MICROSCOPY OF APPLE BLOSSOMS COLONIZED BY ERWINIA-AMYLOVORA AND ERWINIA-HERBICOLA [J].
HATTINGH, MJ ;
BEER, SV ;
LAWSON, EW .
PHYTOPATHOLOGY, 1986, 76 (09) :900-904
[8]   Management of fire blight: A case study in microbial ecology [J].
Johnson, KB ;
Stockwell, VO .
ANNUAL REVIEW OF PHYTOPATHOLOGY, 1998, 36 :227-248
[9]  
Lightner GW, 1999, ACTA HORTIC, V489, P445
[10]  
Madden L. V., 1988, Experimental techniques in plant disease epidemiology., P191