Anzeiger für Schädlingskunde, Pflanzenschutz, Umweltschutz (1990) 63, 1-7

H. Shannag, A. Kleineke-Borchers and C.P.W. Zebitz (1990)
Beziehungen zwischen Befallsdichte und Schaden im System Gewächshausgurke/Weiße Fliege
[Relation between population density and damage in the system cucumber/whitefly]
Anzeiger für Schädlingskunde, Pflanzenschutz, Umweltschutz 63 (1), 1-7
Abstract: Infestation of cucumber-plants with greenhouse whitefly, T. vaporariorum, had an adverse effect on leaf area and cucumber yield. The extent of reduction was dependent from initial density of whiteflies (2, 10 and/or 25 females per plant) just as much as from age of the plants at start of the experiments. Yield loss was strictly correlated with leaf area reduction, as well as with density of whitefly populations. Yield loss based on a decreased number of fruits worth for harvest and on increased drop of flowers and young fruits. Honeydew excreted by whiteflies was settled with sooty mould which extent was dependent from intensity and duration of whitefly infestation. This resulted also in leaf area reduction.
(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
Database assignments for author(s): Claus P.W. Zebitz

Research topic(s) for pests/diseases/weeds:
damage/losses/economics

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Trialeurodes vaporariorum	Cucumber (Cucumis sativus)	Germany