Journal für Kulturpflanzen - Journal of Cultivated Plants (2016) 68, 217-222

Nils Conrad, Meike Brandes, Doreen Gabriel and Udo Heimbach (2016)
Einfluss des Gelbschalentyps auf die Fangzahlen von Rapserdfloh ( Psylliodes chrysocephala L.) in Winterraps ( Brassica napus L.)
[Adults of Cabbage stem flea beetle ( Psylliodes chrysocephala L.) in different types of yellow water traps inwinter oilseed rape ( Brassica napus L.)]
Journal für Kulturpflanzen - Journal of Cultivated Plants 68 (8), 217-222
Abstract: Yellow water traps are a decisive factor in the forecasting system for Psylliodes chrysocephala , the Cabbage stem flea beetle. In most parts of Germany a threshold of 50 imagines per yellow water trap within three weeks is established. In Germany two types of yellow water traps are widely used: an angular (26 x 33 cm) and a round type (22.4 cm diameter). The use of a grid at the top of the yellow water traps is recommended to prevent bees from drowning. The aim of this study carried out on 28 fields all over Germany was to investigate the effects of different types of yellow water traps on Cabbage stem flea beetle catches. Traps were used with and without grid and placed on the soil surface or dug into the soil. Beetle numbers differed significantly between some of the types of yellow water traps, but the difference in densities was in an acceptable range given the overall high variability induced by farmers.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: German)
Link to article at publishers website

Research topic(s) for pests/diseases/weeds:
pheromones/attractants/traps

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Psylliodes chrysocephala	Rape/canola (Brassica napus)	Germany