Numbers of Botrytis fabae conidia dispersed in plots of winter-sown field beans in which chocolate spot developed were monitored with vertical cylinder and. Chocolate spot (Botrytis fabae) is a devastating disease of faba bean and reduces its production and productivity. Three controlled condition experiments were. Botrytis fabae Sardina Botryotinia fuckeliana (de Bary) Wetzel. Mycologia, FUNGI IMPERFECTI, HYPHOMYCETALES, MONILIACEAE. Crops attacked: horse.
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Simple search Basic search Advanced search Search type specimens Search thesaurus Search bibliography. These enlarge and develop a grey, dead centre with a reddish-brown margin. Inoculated leaflets and seedlings were factorial arranged in a CRD with four replications.
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Faba bean has high nutritional value and thus, it is a rich available source of food for human beings and feed for animals [ 2 ]. Matches exactly Value is undefined.
The spores were dislodged by scraping the surface of the medium with a bent glass rod and a sterile needle and washed out of the surface of the medium with distilled sterile water ml.
Regression bogrytis of diameters of colony radial growth against time after inoculation were performed and the slopes were used as measures of growth rates mm day-1 for each temperature treatment [ 33 ]. If you would like to know more about cookies and how they work, please visit www. Radial growth rate was affected by temperature. Chocolate spot Botrytis fabae is a devastating disease of faba bean and reduces its production and productivity. Plants of each variety were exposed to each respective temperature level prior to inoculation.
See below for more fbaae. Values are based on untransformed data. Progress of chocolate spot on whole plants was much slower than in experiment on excised leaves. Slight changes in colony morphology were observed at lower and higher temperatures than the optimum temperature [ 41 ]. Significant difference was measured among fqbae temperatures starting from 72 h after inoculation periods. The mycelia were sub-cultured several times, until the pure cultures were botrtyis. Moreover, Christiansen and Lewis [ 56 ] indicated that when high-temperature stress is exacerbated, plants show symptoms including wilting, leaf burn, leaf folding, and abscission, and changes in physiological responses.
Encyclopedia of Life EOL. Higher temperature during epidemic development could also affect the botrytks ability to produce more propagules.
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botrytos Run Zhang 1 and Dr. Comparably, the highest BoxDire Dawa, Ethiopia Tel: The non-aggressive form of the disease, although dramatic in appearance, does not usually affect yield significantly.
Non-aggressive chocolate spot, which can be caused by either B. Temperature and variety were considered as main effects and the experiment was repeated twice. Contact our curators Dr. A damaging disease developed on commercial fava bean Vicia faba L. Temperature affected incubation period, lesion expansion, percent leaf damage, AUDPC and rate of chocolate spot progress on both detached leaf and whole plant tests in faba bean. Three controlled condition experiments were conducted to assess the effect of temperature on growth and sporulation of B.
Rising temperature is a gradual votrytis that gives time-window for adjustment and interaction with other dynamic climate variables may influence the effect of temperature. The values in the table are based on untransformed data of lesion expansion fahae two runs of experiments. Using Google Analytics, we can see what bootrytis is popular on our websites. Among biotic stresses, diseases have always been the major limiting factors for faba bean cultivation.
Botrytis fabae Sardina, Memorias de la Faba. Previous studies showed that an increase in temperature beyond the optimum decreases pustule production on leek leaves by Puccinia allii infection, suggesting that high spore densities were required for successful infection at higher temperatures [ 54 ].
Severe Outbreak of Chocolate Spot of Fava Bean, Caused by Botrytis fabae, in California
Host-Plant Resistance Resistance in V. Leaflets inoculated with distilled sterile water served as control.
The overall final mean DS at all incubation temperatures revealed that Bulga scored the highest Since high humidity for botryris periods is favourable for development of the aggressive stage, trying to reduce humidity in crops by choice of optimum seed rates avoiding high planting densities and not growing crops in oversheltered btrytis will help. Pathogenicity was confirmed by inoculating isolates onto fava bean plants, incubating them in a humidity chamber for 48 h, then maintaining plants in a greenhouse.
The numbers of conidia ml-1 were analyzed after logarithmic transformation of the values obtained [ 32 ]. As disease progressed, spots coalesced and caused large red areas on leaves and stems. The experiment was not repeated. There tends to be an even distribution of these lesions over the surface of the organ, giving rise to a ‘peppered’ appearance.
The major ones include ascochyta blight Ascochyta fabae Speg. Both detached leaf and whole plant tests were promising tools for assessing faba response of faba bean plants to B. Broad bean chocolate spot. The current results indicated that temperature strongly influenced growth and sporulation of B.