12 Result(s)
within
Lucien Hoffmann
Plant Sciences
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Article
Open AccessWhitefly endosymbionts: IPM opportunity or tilting at windmills?
Whiteflies are sap-sucking insects responsible for high economic losses. They colonize hundreds of plant species and cause direct feeding damage and indirect damage through transmission of devastating viruses....
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Article
Enhancing septoria leaf blotch forecasts in winter wheat I: the effect of temperature on the temporal distance between critical rainfall periods and the breaking of the control threshold
In integrated pest management (IPM), pests are controlled when the costs of control correspond with the damage caused by a pest on a monetary scale, implying that low pest levels are left uncontrolled. Several...
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Article
Open AccessEnhancing septoria leaf blotch forecasts in winter wheat II: model architecture and validation results
In precision agriculture, pesticides and other inputs shall be used precisely when (and where) they are needed. European Directive 2009/128/EC calls for respecting the principles of integrated pest management ...
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Article
Atomic force microscopy (AFM) application to diatom study: review and perspectives
Atomic force microscopy (AFM) allows high image resolution, based on slight differences in surface height and on imaging transparent structures, thus, is an excellent type of microscopy for imaging nano-sized ...
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Article
Composition and evaluation of a novel web-based decision support system for grape black rot control
Black rot on grapevine is a fungal disease caused by Phyllosticta ampelicida (syn. Guignardia bidwellii) affecting grape leaves as well as clusters. A novel black rot decision support system termed VitiMeteo Blac...
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Article
Fractal dimension and shape parameters of asexual Fusarium spores from selected species: Which species can be distinguished?
Fungi of the genus Fusarium are prominent plant pathogens producing various toxic secondary metabolites. Digital microscopic images were taken from the asexual spores of Fusarium avenaceum, F. cerealis, F. culmor...
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Article
A note on the insecticide sensitivity status of Meligethes species (Coleoptera: Nitidulidae) in Luxembourg
Adult pollen beetles, Meligethes spp. (Coleoptera: Nitidulidae), were sampled from 27 and 35 oilseed rape (Brassica napus subsp. oleifera) fields scattered over Luxembourg in 2008 and 2009, respectively. Ten well...
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Article
Evidence for natural resistance towards trifloxystrobin in Fusarium graminearum
A collection of 55 Fusarium graminearum (Gibberella zeae) strains isolated between 1969 and 2009 in Belgium, Canada, Germany, Italy, Luxembourg, or the USA belonging to the three known chemotypes (3-acetylated de...
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Article
Monitoring gene expression of potato under salinity using cDNA microarrays
The molecular response to salt exposure was studied in the leaves of a Solanum tuberosum clone using cDNA microarray. Differentially expressed genes were classified according to their known or predicted function ...
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Article
Response of diatom indices to simulated water quality improvements in a river
Various diatom indices are routinely used in European countries to monitor water quality in waterways. In order to assess their sensitivities and their integration interval after a sudden and lasting environme...
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Cyanidium-like algae from caves
Cyanidium Geitler and the related genera Cyanidioschyzon De Luca, Taddei & Varano and Galdieria Merola are typical representatives of hot, acidic ecosystems; a large amount of data concerning the...
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Article
Algae of terrestrial habitats
The paper summarizes the present knowledge on the most important terrestrial habitats for algae and deals with soil, lithophytic, cave, snow and ice, epiphytic, and epizooic algae. For each habitat the physica...
