Abstract
The interactions between the root parasitic weed Orobanche crenata Forsk. and its host plant faba bean ( Vicia faba L.) were quantified under controlled and field conditions at ICARDA’s Tel Hadya research station. In the field experiments conducted in 1993–94 and 1994–95 faba beans were sown on two dates, in plots with 0, 50, 200 and 600 O. crenata seeds kg –1 soil, under both limited and sufficient moisture supply. The effects of temperature on the duration of the early developmental stages of O. crenata were investigated in a growth chamber. The extent of O. crenata infestation was closely related to the number of parasite seeds in the soil. The seed‐density treatment with 600 seeds kg –1 soil resulted in complete crop failure. Furthermore, O. crenata infestation was higher under sufficient than under limiting water supply conditions, irrespective of sowing date. Only in the moderately infested plots, did shifting of the planting time of faba bean result in a significant decrease in parasite dry weight and an increase in crop seed yield. The timing of germination, attachment and further developmental stages of O. crenata was not related to faba bean growth stage and was affected primarily by soil temperature. The duration of O. crenata developmental stages was estimated using the thermal time concept. The relationship between total number of parasite attachments at the harvest of the faba bean crop and O. crenata seed density was dependent on maximum faba bean root‐length density measured by the start of pod‐filling in each treatment combination of sowing date and moisture supply. The results are discussed with reference to implications for the development of a dynamic simulation model for the prediction of faba bean yield losses caused by O. crenata .
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Claims 8
Claim · model-written summary
Orobanche infestation closely tracked parasite seed numbers in soil.
- Taxon
- faba bean
Vicia fabat0 - Treatment
- parasite seeds in the soile0
- Interactor
- Orobanche crenata
Orobanche crenatat0parasite - Outcome
- O. crenata infestatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The extent of O. crenata infestation was closely related to the number of parasite seeds in the soil.”
t0“Orobanche crenata infestation in faba beans as affected by abiotic factors and parasite soil seedbank”
Claim · model-written summary
At 600 seeds per kilogram soil, infestation caused complete faba bean crop failure.
- Taxon
- faba beanVicia fabat0
- Treatment
- 600 seeds kg –1 soile0
- Interactor
- Orobanche crenataOrobanche crenatat0parasite
- Outcome
- complete crop failuree0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The seed‐density treatment with 600 seeds kg –1 soil resulted in complete crop failure.”
t0“Orobanche crenata infestation in faba beans as affected by abiotic factors and parasite soil seedbank”
Claim · model-written summary
Orobanche infestation was higher with sufficient than limiting water supply.
- Taxon
- faba beanVicia fabat0
- Treatment
- sufficiente0
- Interactor
- Orobanche crenataOrobanche crenatat0parasite
- Outcome
- O. crenata infestatione0
- Direction
- highere0
- Comparator
- limiting water supply conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“O. crenata infestation was higher under sufficient than under limiting water supply conditions, irrespective of sowing date.”
t0“Orobanche crenata infestation in faba beans as affected by abiotic factors and parasite soil seedbank”
Claim · model-written summary
Shifting planting time significantly reduced parasite dry weight in moderately infested plots.
- Taxon
- faba beanVicia fabat0
- Treatment
- shifting of the planting timee0
- Interactor
- Orobanche crenataOrobanche crenatat0parasite
- Outcome
- parasite dry weighte0
- Direction
- decreasee0
- Qualifier
- moderately infested plotse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only in the moderately infested plots, did shifting of the planting time of faba bean result in a significant decrease in parasite dry weight and an increase in crop seed yield.”
t0“Orobanche crenata infestation in faba beans as affected by abiotic factors and parasite soil seedbank”
Claim · model-written summary
Shifting planting time increased crop seed yield in moderately infested plots.
- Taxon
- faba beanVicia fabat0
- Treatment
- shifting of the planting timee0
- Interactor
- Orobanche crenataOrobanche crenatat0parasite
- Outcome
- crop seed yielde0
- Direction
- increasee0
- Qualifier
- moderately infested plotse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only in the moderately infested plots, did shifting of the planting time of faba bean result in a significant decrease in parasite dry weight and an increase in crop seed yield.”
t0“Orobanche crenata infestation in faba beans as affected by abiotic factors and parasite soil seedbank”
Claim · model-written summary
Parasite developmental timing was unrelated to faba bean growth stage.
- Taxon
- faba beanVicia fabat0
- Organ / stage
- faba bean growth stagee0
- Interactor
- Orobanche crenataOrobanche crenatat0parasite
- Outcome
- timing of germination, attachment and further developmental stages of O. crenatae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The timing of germination, attachment and further developmental stages of O. crenata was not related to faba bean growth stage and was affected primarily by soil temperature.”
t0“Orobanche crenata infestation in faba beans as affected by abiotic factors and parasite soil seedbank”
Claim · model-written summary
Soil temperature primarily affected parasite developmental timing.
- Taxon
- faba beanVicia fabat0
- Treatment
- soil temperaturee0
- Interactor
- Orobanche crenataOrobanche crenatat0parasite
- Outcome
- timing of germination, attachment and further developmental stages of O. crenatae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The timing of germination, attachment and further developmental stages of O. crenata was not related to faba bean growth stage and was affected primarily by soil temperature.”
t0“Orobanche crenata infestation in faba beans as affected by abiotic factors and parasite soil seedbank”
Claim · model-written summary
Parasite attachments at harvest depended jointly on parasite seed density and maximum bean root-length density.
- Taxon
- faba beanVicia fabat0
- Organ / stage
- faba bean root‐length densitye0
- Treatment
- O. crenata seed densitye0
- Interactor
- Orobanche crenataOrobanche crenatat0parasite
- Outcome
- total number of parasite attachmentse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The relationship between total number of parasite attachments at the harvest of the faba bean crop and O. crenata seed density was dependent on maximum faba bean root‐length density measured by the start of pod‐filling in each treatment combination of sowing date and moisture supply.”
t0“Orobanche crenata infestation in faba beans as affected by abiotic factors and parasite soil seedbank”
The same questions in other papers
sowing time · Orobanche crenata · Vicia faba (faba bean)Results agree
1 paper in the same direction as this paper
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.