Abstract
【Objective】 The purpose of this study was to investigate the disease(broad bean blister disease) geographical distribution,disease cycle and influence factors on disease development,so that understand the occurrence regularity of the disease.【Method】 Wide survey of broad bean blister was undertaken to determine the distribution of the disease.Laboratory assay was used to test the effect of temperature and overwinter on germination of resting sporangia.Field trails were conducted to study the disease cycle and epidemical factors.【Results】 The geographical distribution of broad bean blister,caused by Olpidium viciaen was limited in ecological zone above 2 400 m altitude suitable for spring sowing broad bean,of Aba Autonomous region,Northwestern Plateau of Sichuan province.The disease cycle and developmental characteristics of the disease were as follows: the resting sporangia of O.viciae survived and rested(oversummer and overwinter) on disease plant debris in field soil as the initial infection sources.After sowing seeds of broad bean in spring the resting sporangia germinated and produced zoospores.The zoospores infected seedling of broad bean.After the disease occurred in field,zoosporangia constantly produced on infected plant tissues and liberated zoospores as a reinfection source.The zoospores were dispersed by the air and water splash in short distance.The frequency of reinfection by the pathogen was very highly.The disease epidemic curve was S type.Continuous cropping and application of animal manure with infected plant debris increased incidence of the disease.No resistant variety was found.【Conclusion】 These results demonstrated the occurrence regularity of broad bean blister,and provided scientific base for controlling the disease.
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Claims 10
Claim · model-written summary
Broad bean blister was limited to spring broad bean ecological zones above 2,400 m in Aba, Sichuan.
- Taxon
- broad bean
Vicia fabae0 - Interactor
- Olpidium viciaene0pathogen
- Outcome
- geographical distribution of broad bean blistere0
- Direction
- limitede0
- Value
- 2 400 me0
- Setting
- Aba Autonomous region,Northwestern Plateau of Sichuan provincee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The geographical distribution of broad bean blister,caused by Olpidium viciaen was limited in ecological zone above 2 400 m altitude suitable for spring sowing broad bean,of Aba Autonomous region,Northwestern Plateau of Sichuan province.”
Claim · model-written summary
Resting sporangia of O. viciae survived in infected plant debris in field soil as initial inoculum.
- Taxon
- broad beanVicia fabat0
- Interactor
- O.viciaeOlpidium viciaee0pathogen
- Outcome
- resting sporangia of O.viciae survived and rested(oversummer and overwinter)e0
- Setting
- field soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the resting sporangia of O.viciae survived and rested(oversummer and overwinter) on disease plant debris in field soil as the initial infection sources.”
t0“Broad Bean”
Claim · model-written summary
After spring sowing, resting sporangia germinated and produced zoospores that infected broad bean seedlings.
- Taxon
- broad beanVicia fabae0
- Organ / stage
- seedlinge0
- Outcome
- zoospores infected seedling of broad beane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After sowing seeds of broad bean in spring the resting sporangia germinated and produced zoospores.The zoospores infected seedling of broad bean.”
t0“Broad Bean”
Claim · model-written summary
Infected plant tissue produced zoosporangia that released zoospores for reinfection.
- Taxon
- broad beanVicia fabat0
- Organ / stage
- infected plant tissuese0
- Outcome
- zoosporangia constantly produced on infected plant tissues and liberated zoosporese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“zoosporangia constantly produced on infected plant tissues and liberated zoospores as a reinfection source.”
t0“Broad Bean”
Claim · model-written summary
Zoospores were dispersed short distances by air and water splash.
- Taxon
- broad beanVicia fabat0
- Outcome
- zoospores were dispersed by the air and water splash in short distancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The zoospores were dispersed by the air and water splash in short distance.”
t0“Broad Bean”
Claim · model-written summary
Pathogen reinfection was very frequent.
- Taxon
- broad beanVicia fabat0
- Outcome
- frequency of reinfection by the pathogene0
- Direction
- very highlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The frequency of reinfection by the pathogen was very highly.”
t0“Broad Bean”
Claim · model-written summary
The broad bean blister epidemic followed an S type curve.
- Taxon
- broad beanVicia fabat0
- Outcome
- disease epidemic curve was S typee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The disease epidemic curve was S type.”
t0“Broad Bean”
Claim · model-written summary
Continuous cropping increased broad bean blister incidence.
- Taxon
- broad beanVicia fabat0
- Treatment
- Continuous croppinge0
- Outcome
- incidence of the diseasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Continuous cropping and application of animal manure with infected plant debris increased incidence of the disease.”
t0“Broad Bean”
Claim · model-written summary
Animal manure containing infected plant debris increased broad bean blister incidence.
- Taxon
- broad beanVicia fabat0
- Treatment
- application of animal manure with infected plant debrise0
- Outcome
- incidence of the diseasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Continuous cropping and application of animal manure with infected plant debris increased incidence of the disease.”
t0“Broad Bean”
Claim · model-written summary
No resistant broad bean variety was found.
- Taxon
- broad beanVicia fabat0
- Outcome
- No resistant variety was founde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No resistant variety was found.”
t0“Broad Bean”
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