Development of cercospora blight epidemics and effect on the summer annual Heliotropium europaeum in the field
Identifieur interne : 000580 ( Istex/Corpus ); précédent : 000579; suivant : 000581Development of cercospora blight epidemics and effect on the summer annual Heliotropium europaeum in the field
Auteurs : L. A. Brun ; A. W. Sheppard ; E. Delmotte ; S. Hasan ; M. JourdanSource :
- Annals of Applied Biology [ 0003-4746 ] ; 1995-08.
English descriptors
- KwdEn :
- August, Australian journal, Australian sites, Biological control, Blight, Brun, Cent leaf necrosis, Cercospora, Cercospora blight, Cercospora blight epidemics, Cercospora infection, Cercospora leaf spot, Common heliotrope, Conidium, Control fungicide, Control plants, Different concentrations, Different treatments, Disease development, Disease severity, Disease spread, Europaeum, Europaeum plants, Field experiments, Field inoculation experiments, Germination, Hasan, Heliotrope, Heliotropium, Heliotropium europaeum, High humidity, Initial infection, Inoculated, Inoculated plants, Inoculation, Inoculum, Inoculum concentration, Jugiong, Leaf area, Leaf necrosis, Leaf surface, Lesion, Litre, Logit transformation, Moules, Native range, Natural epidemics, Necrosis, Necrotic lesions, Pathogen, Peat pots, Percent necrosis, Personal communication, Petri dishes, Plant density, Plant mortality, Plants inoculated, Primary infection, Rain showers, Regression line, Seed production, Seed viability, Sheppard, Southern australia, Southern france, Subterranean clover, Sugar beet, Total leaf area, Weed, Younger plants.
- Teeft :
- August, Australian journal, Australian sites, Biological control, Blight, Brun, Cent leaf necrosis, Cercospora, Cercospora blight, Cercospora blight epidemics, Cercospora infection, Cercospora leaf spot, Common heliotrope, Conidium, Control fungicide, Control plants, Different concentrations, Different treatments, Disease development, Disease severity, Disease spread, Europaeum, Europaeum plants, Field experiments, Field inoculation experiments, Germination, Hasan, Heliotrope, Heliotropium, Heliotropium europaeum, High humidity, Initial infection, Inoculated, Inoculated plants, Inoculation, Inoculum, Inoculum concentration, Jugiong, Leaf area, Leaf necrosis, Leaf surface, Lesion, Litre, Logit transformation, Moules, Native range, Natural epidemics, Necrosis, Necrotic lesions, Pathogen, Peat pots, Percent necrosis, Personal communication, Petri dishes, Plant density, Plant mortality, Plants inoculated, Primary infection, Rain showers, Regression line, Seed production, Seed viability, Sheppard, Southern australia, Southern france, Subterranean clover, Sugar beet, Total leaf area, Weed, Younger plants.
Abstract
Heliotropium europaeum, common heliotrope, is a serious economic weed in southern Australia. Cercospora blight occurs on H. europaeum in both its native (Mediterranean) and non‐native (Australian) range. The causal agents are genetically different forms of an asexual pathogen in the form‐genus Cercospora in each region. Natural epidemics of cercospora blight killed weed infestations in both Australia and France. The epidemiology of the disease did not differ between the two regions once differences in rainfall had been considered. Rainfall was important for disease spread. In France, field inoculation experiments were conducted using different concentrations of conidia prepared from a monospore isolate. Cercospora blight reduced seed production 89%, but did not reduce viability. Increased inoculum concentration and inoculation of younger plants encouraged an early epidemic, but did not affect the rate of disease development once the epidemic took hold. In order to be effective at controlling this weed in Australia, these pathogens need to attack young hosts and have regular rain‐splash to facilitate spread to new growth.
Url:
DOI: 10.1111/j.1744-7348.1995.tb06658.x
Links to Exploration step
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<front><div type="abstract" xml:lang="en">Heliotropium europaeum, common heliotrope, is a serious economic weed in southern Australia. Cercospora blight occurs on H. europaeum in both its native (Mediterranean) and non‐native (Australian) range. The causal agents are genetically different forms of an asexual pathogen in the form‐genus Cercospora in each region. Natural epidemics of cercospora blight killed weed infestations in both Australia and France. The epidemiology of the disease did not differ between the two regions once differences in rainfall had been considered. Rainfall was important for disease spread. In France, field inoculation experiments were conducted using different concentrations of conidia prepared from a monospore isolate. Cercospora blight reduced seed production 89%, but did not reduce viability. Increased inoculum concentration and inoculation of younger plants encouraged an early epidemic, but did not affect the rate of disease development once the epidemic took hold. In order to be effective at controlling this weed in Australia, these pathogens need to attack young hosts and have regular rain‐splash to facilitate spread to new growth.</div>
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<abstract>Heliotropium europaeum, common heliotrope, is a serious economic weed in southern Australia. Cercospora blight occurs on H. europaeum in both its native (Mediterranean) and non‐native (Australian) range. The causal agents are genetically different forms of an asexual pathogen in the form‐genus Cercospora in each region. Natural epidemics of cercospora blight killed weed infestations in both Australia and France. The epidemiology of the disease did not differ between the two regions once differences in rainfall had been considered. Rainfall was important for disease spread. In France, field inoculation experiments were conducted using different concentrations of conidia prepared from a monospore isolate. Cercospora blight reduced seed production 89%, but did not reduce viability. Increased inoculum concentration and inoculation of younger plants encouraged an early epidemic, but did not affect the rate of disease development once the epidemic took hold. In order to be effective at controlling this weed in Australia, these pathogens need to attack young hosts and have regular rain‐splash to facilitate spread to new growth.</abstract>
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<abstract lang="en">Heliotropium europaeum, common heliotrope, is a serious economic weed in southern Australia. Cercospora blight occurs on H. europaeum in both its native (Mediterranean) and non‐native (Australian) range. The causal agents are genetically different forms of an asexual pathogen in the form‐genus Cercospora in each region. Natural epidemics of cercospora blight killed weed infestations in both Australia and France. The epidemiology of the disease did not differ between the two regions once differences in rainfall had been considered. Rainfall was important for disease spread. In France, field inoculation experiments were conducted using different concentrations of conidia prepared from a monospore isolate. Cercospora blight reduced seed production 89%, but did not reduce viability. Increased inoculum concentration and inoculation of younger plants encouraged an early epidemic, but did not affect the rate of disease development once the epidemic took hold. In order to be effective at controlling this weed in Australia, these pathogens need to attack young hosts and have regular rain‐splash to facilitate spread to new growth.</abstract>
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