Response of aphids and greenhouse plants to insecticidal concentrations of carbon dioxide

Autor: Goerke, K., Künstner, H., Unger, C. (2005)
In:

Journal of Plant Diseases and Protection,

Bandangabe: 112
Auflage: 5
Gesamttitelundnr1: Response of aphids and greenhouse plants to insecticidal concentrations of carbon dioxide
Seite: 508 - 518
Jahr: 2005

Einordung:
Institut: Professur Phytomedizin

Abstract:
Summary
Greenhouse heaters using natural gas produce large quantities of combustion waste gas containing
about 10 % CO2. The upper most part of waste gas is formed at cooler night temperatures. Our
investigations test for the first time the possibility of using CO2 as inexpensive and residual-free
insecticide for greenhouse plants, applied overnight. In an experimental gadget tomato plants were
fumigated for one week (12 h/d) with different CO2 concentrations overnight and the effect on the
mortality and reproduction rate of aphids was determined. Further, morphological and physiological
parameters of the tomato plants were analyzed, in order to judge possible negative effects of the CO2
fumigation on the plant. With a CO2 concentration of more than 8.5 % in the atmosphere the aphid
populations were reduced by about 50 %, without any visible or physiological harm to the plants. The
differences between controls and treated plants concerning total protein, total phenol and peroxidase
activity indicated that the plants had negligible physiological stress up to 10 % CO2.

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