Grey mould development in greenhouse tomatoes under drip and furrow irrigation

Aissat, Kamel; Nicot, Philippe C.; Guechi, A.; Bardin, Marc; Chibane, Mohamed

doi:10.1051/agro:2008016

Cited by 14 publications

(10 citation statements)

References 29 publications

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“…The incidence of stem lesions and the length of developing lesions (in mm) were recorded daily. Area under the disease progress curves ( audpc ) were computed as described by Aissat et al. (2008) and Decognet et al.…”

Section: Methodsmentioning

confidence: 99%

Contrasted responses of Botrytis cinerea isolates developing on tomato plants grown under different nitrogen nutrition regimes

Lecompte

Abro²,

Nicot³

2010

Plant Pathology

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The nutritional status of a plant is known to influence its susceptibility to pathogens. In the case of Botrytis cinerea, the role of nitrogen fertilization of various host plants on disease development appears to be variable. This study was carried out to characterize possible variability associated with isolates and inoculum density of B. cinerea in its ability to infect leaf-pruning wounds and to develop stem lesions on tomato plants, as affected by the nitrogen input. Six isolates differing in their aggressiveness to tomato were compared. They all had similar reaction patterns in vitro in response to differential nitrogen levels. In tests on plants grown with contrasted regimes of nitrate fertilization, overall disease severity was lower for all isolates on plants with higher nitrogen inputs, regardless of inoculum concentration. However, differences among isolates were observed in the effect of plant nitrogen nutrition on infection and on lesion expansion. Disease onset was delayed on all plants with higher nitrogen inputs, but the response was greater for isolates with lower aggressiveness on tomato. The highest contrast among isolates was observed with the colonization of stems. The daily rate of stem lesion expansion decreased with increasing nitrogen fertilization levels for the more aggressive isolates, while it increased for the less aggressive isolate. Hypotheses to explain these results are discussed in light of the possible physiological effects of nitrogen fertilization on nutrient availability for the pathogen in the host tissue and of possible production of defence metabolites by the plant.

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Section: Methodsmentioning

confidence: 99%

Contrasted responses of Botrytis cinerea isolates developing on tomato plants grown under different nitrogen nutrition regimes

Lecompte

Abro²,

Nicot³

2010

Plant Pathology

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“…We recorded the incidence of infection on the pruning wounds (and where appropriate, on leaves left intact) as well as the resulting stem cankers. The areas under the disease progress curves (AUDPC) were computed as described by Aissat et al (2008) to express the cumulative incidence of the deleafing method over an experiment or a growing season (all experiments except Perpignan trial). The treatments were compared by analysis of variance, using STATISTICA software (StatSoft, Inc., Tulsa, USA).…”

Section: Disease Assessment and Data Analysismentioning

confidence: 99%

“…Much research effort has been dedicated to the development of non-chemical pest control methods. Along with biological control methods, a variety of cultural practices have been gradually improved to suppress or limit the impact of pests and enhance the efficacy of integrated protection strategies, particularly for protected vegetable crops (Aissat et al, 2008;Candido et al, 2008;van Lenteren, 2000;Schellhorn et al, 2009;Shipp et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Improved leaf pruning reduces development of stem cankers caused by grey mould in greenhouse tomatoes

Decognet¹,

Ravetti²,

Martin³

et al. 2010

Agron. Sustain. Dev.

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Botrytis cinerea, the causal agent of grey mould, is considered as a major burden on greenhouse tomato production. In heated greenhouses, where leaf pruning is a routine practice and microclimatic conditions are favourable for grey mould development, infections of the pruning wounds result in stem cankers that can rapidly kill the plants. Chemical control is not always sufficiently effective and growers face increasing demands for reducing their dependency on pesticides. Several techniques can be used for the removal of leaves. They differ mainly on the presence or absence and the size of petiole stubs remaining on the stems after pruning. In this study, leaf pruning techniques were compared in an experimental greenhouse and the results validated in four commercial greenhouses, in a variety of agronomic conditions and in various situations of inoculum pressure. All experiments clearly showed that a careful removal of the leaves without leaving any petiole stubs on the stems can significantly decrease the incidence of stem cankers even under high disease pressure. As up to 10-fold differences were observed, this suggests the possibility of improving pruning practices in tomato greenhouses by removing leaves systematically close to the stem. This environmentally-friendly cultural practice appears compatible for integration with other preventative methods for the objective of sustainable crop protection in greenhouse tomatoes. grey mould / Solanum lycopersicum / integrated pest management / sustainable crop protection

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“…; http://fr.windfinder.com/windstats/windstatistic_bejaia_aeroport.htm), a period that covers the time when Botrytis epidemics occur in the tomato greenhouses of that region (Aissat et al. ). Considering the dominant wind direction during our study and the distance between the sampling sites, genotypic data are generally (but not systematically) in agreement with possible contribution of inoculum between greenhouses from the most eastern to the most western site of a given year.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Botrytis cinerea Populations Collected from Tomato Greenhouses in Northern Algeria

Adjebli

Leyronas

Aissat

et al. 2014

Journal of Phytopathology

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To estimate the genetic diversity and population structure for a better understanding of the spread of Botrytis cinerea, we genotyped with nine microsatellite markers 174 isolates collected from four greenhouses during three growing seasons in the region of Bejaia. Four of these isolates were detected as Botrytis pseudocinerea according to the allele size at locus Bc6. For all other isolates further studied, all loci were polymorphic, with the mean number of alleles per locus ranging from 2.77 to 5.22. Considerable genetic variability was detected in all subpopulations (D* > 0.87; Hnb > 0.40). Based on the standardized index of association analysis, significant but low levels of clonality occurred, not excluding the possibility of recombination (rD = 0.07, P < 0.001). A total of 109 haplotypes were characterized among the isolates, few of which were shared between subpopulations. This, together with moderate genetic differentiation among subpopulations according to the geographical origin (0.080 < FST < 0.167), suggested a low level of inoculum exchange among greenhouses and little carry‐over of inoculum from one sampling season to the next. The importance of genetic structure of B. cinerea populations is discussed and should be taken into consideration for the management of grey mould.

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Grey mould development in greenhouse tomatoes under drip and furrow irrigation

Cited by 14 publications

References 29 publications

Contrasted responses of Botrytis cinerea isolates developing on tomato plants grown under different nitrogen nutrition regimes

Contrasted responses of Botrytis cinerea isolates developing on tomato plants grown under different nitrogen nutrition regimes

Improved leaf pruning reduces development of stem cankers caused by grey mould in greenhouse tomatoes

Comparison of Botrytis cinerea Populations Collected from Tomato Greenhouses in Northern Algeria

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