Horizontal and vertical distribution of airborne conidia of Botrytis cinerea in a gerbera crop grown under glass

Kerssies, A.

doi:10.1007/bf01974311

Cited by 12 publications

(8 citation statements)

References 10 publications

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“…The horizontal distribution of B. cinerea spores in a rose crop grown under glass, counted as colonies or as lesions on petals, was fairly uniform in both years. This is in agreement with results from gerbera [Kerssies, 1993b]. The lack of significant differences in the colony numbers between trapping locations and in lesion numbers on rose flowers from different harvest locations suggests that the relatively small spores (O 10 ~tm) of B. cinerea may be dispersed rapidly through the glasshouse by the air movements occurring inside the glasshouse [Frinking et al, 1987].…”

Section: Discussionsupporting

confidence: 88%

Influence of environmental conditions in a glasshouse on conidia ofBotrytis cinerea and on post-harvest infection of rose flowers

Kerssies¹,

Zessen²,

Frinking

1995

Eur J Plant Pathol

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Quantification and horizontal distribution of air-borne inoculum of Botrytis cinerea in a rose crop in a glasshouse of 300 m 2 was studied in 1991 and 1992. Conidia of B. cinerea were caught in spore traps consisting of an agar medium selective for B. cinerea in Petri dishes placed within the crop, at flower height 1 m above the ground. Spore catches were counted as colonies, after incubation. Lesions due to conidial infection were counted on petals of rose flowers, also after incubation. Relative humidity (RH) and temperature within the glasshouse and global radiation and windspeed outside were recorded during the experiments. The horizontal distribution of B. cinerea in a rose crop grown under glass was fairly uniform in both years. In 1991 a clear seasonal pattern in the number of colonies could not be found. In 1992 the number of colonies were high in August, September and October. The number of lesions on rose flowers showed a distinct pattern in both years. In August, September and October many lesions were counted whereas in the other months few lesions appeared. In linear regression analysis, variation in numbers of colonies (spore catches) could not be explained by environmental factors recorded during the experiments. Linear regression accounted for 76 and 63% of the variation in the number of lesions on rose flowers in 1991 and 1992, in terms of relative humidity (positively correlated), global radiation outside the glasshouse (negatively correlated) and numbers of colonies on spore traps (positively correlated). The results in the rose crop suggest that RH, global radiation and spore density in glasshouses are important variables in regulating the numbers of lesions during storage and transport. The numbers of spores in glasshouses are dependent on the production system. A glasshouse with a system resulting in wet dead tissue on the ground give higher amount of spores in the glasshouse air and through that high numbers of lesions on flowers. On roses outside the glasshouses very high numbers of lesions were counted sometimes, mostly during and after rain showers, as a result of rain-deposition of spores onto the flowers.

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Section: Discussionsupporting

confidence: 88%

Influence of environmental conditions in a glasshouse on conidia ofBotrytis cinerea and on post-harvest infection of rose flowers

Kerssies¹,

Zessen²,

Frinking

1995

Eur J Plant Pathol

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“…Due to the natural ventilation of the greenhouse investigated, there could be an exchange of air between greenhouse and outdoor environment, depending on the outdoor climate (Wang et al 1999). Because of this, fungal spores can enter and leave the greenhouse (Zadoks 1967;Schepers 1984, Frinking 1991Kerssies 1993a). In the present study, less than the quarter of the greenhouse microfungal taxa has been detected in the outdoors samples.…”

Section: Discussionmentioning

confidence: 99%

The air spora of an orchid greenhouse

et al. 2010

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The orchid collection of the ELTE Botanical Garden, Budapest, Hungary was monitored for airborne fungi using viable and non-viable air-sampling methods (Hirst-type and a 3-stage Andersen sampler) with three different culture media. A new culture method was also applied to identify fungal spores from Hirst-type samples. The aim of this study was to determine the diversity, human-and phytopathological potential of the air spora. To find out sources of airborne fungi, samples were collected from the air in an adjacent greenhouse and outdoors, and from necrotic plants. A total of 58 genera were found in the air samples. Cladosporium and Penicillium spp. were common members of the airborne biota. A high proportion (27.5%) of identified genera may be presented as a member of microbial consortium associated with the orchids. Airborne fungi potentially pathogenic to humans were also detected. One species, Zygosporium masonii, was new to Hungary. Statistical analysis indicated that conditions of sampling had significant effects. The principal component analysis elucidated the three principal components representing 75.34% of the total variance; the clusters of variables were related to the three types of culture media. Relative abundance of small-sized spores was high, presumably because of the fungal species composition and accelerated sedimentation of large spores in still air. Apparently, in the studied orchid greenhouse, a specific mycobiota developed due to the climate and hosts (Orchideaceae) grown there.

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“…Concentration of airborne fungal spores has been related to wind, humidity, temperature, rainfall, altitude, vegetation, and some specific reservoirs of contamination. Also, fungal propagative units may be dispersed in the air by insects (KERSSIES 1993). The prevalence of airborne and waterborne fungi is highly variable and determined by many factors.…”

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Isolation, identification and seasonal distrubution of airborne and waterborne fungi in Terkos Lake (Istanbul–Turkey)

Asan

Kırgız

Şen

et al. 2003

J. Basic Microbiol.

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This paper focuses on isolation and identification of airborne and waterborne fungi from different parts of Terkos Lake located in Istanbul (Turkey). The quantitative and qualitative fungal composition of the air and water of the Lake was surveyed monthly for a year (August 2000-July 2001). Water samples were taken at five different stations at Terkos Lake. Airborne fungal spore levels were estimated by exposing a petri dish containing Rose-Bengal streptomycin agar medium to air for 15 minutes. A total of 2372 fungal colonies (1032 from air and 1340 water) was counted on 216 petri plates. We isolated twenty mould species belonging to 9 genera. Scopulariopsis brevicaulis, Penicillium expansum and Cladosporium herbarum were the most abundant species (22.0%, 13.4% and 12.9%, respectively). Cladosporium herbarum and sphaerospermum are very common in air samples (29.7% and 27.0%, respectively). Many of the species isolated are rarely in the atmospheric and water environment such as Aspergillus niger and Cladosporium variabile. Statistical analysis revealed a positive correlation between total CFUs and a number of environmental factors.

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Horizontal and vertical distribution of airborne conidia of Botrytis cinerea in a gerbera crop grown under glass

Cited by 12 publications

References 10 publications

Influence of environmental conditions in a glasshouse on conidia ofBotrytis cinerea and on post-harvest infection of rose flowers

Influence of environmental conditions in a glasshouse on conidia ofBotrytis cinerea and on post-harvest infection of rose flowers

The air spora of an orchid greenhouse

Isolation, identification and seasonal distrubution of airborne and waterborne fungi in Terkos Lake (Istanbul–Turkey)

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