Mitteilungen der deutschen Gesellschaft für allgemeine und angewandte Entomologie (2006) 15, 269-272

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Markus Holaschke, Lei Hua, Thies Basedow and Christine Kliche-Spory (2006)
Untersuchungen zur Wirkung eines standardisierten Extraktes aus dem Holz von Quassia amara L. ex Blom auf Getreideblattläuse und deren Antagonisten
[Effect of a standardised extract from the wood of Quassia amara L. ex BLOM on cereal aphids and their antagonists]
Mitteilungen der deutschen Gesellschaft für allgemeine und angewandte Entomologie 15, 269-272
Abstract: The effect of a standardised extract from the bitterwood Quassia amara L. ex BLOM was analysed on the cereal aphids Sitobion avenae F., Rhopalosiphum padi L. and Metopolophium dirhodum WLK. A root application with 1 mg quassin 1-1 on oat plants in the greenhouse showed an efficacy of 89.6% after 72 hrs on S. avenae, 50.0% on R. padi and 27.6% on M. dirhodum. One week after the treatment 42.3% were obtained for S. avenae whereas R. padi and M. dirhodum showed no comparable reaction. Possible effects on larvae of the ladybeetle Coccinella septempunctata L. were checked in glassplate tests and in feeding tests with treated R. padi. No effects could be seen both on vitality and pupation of the larvae and on hatching and fertility of the adult beetles.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: German)

Research topic(s) for pests/diseases/weeds:
control - general
health/environmental effects of pesticides
Research topic(s) for beneficials or antagonists:
resistance to pesticides

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Sitobion avenae
Rhopalosiphum padi
Metopolophium dirhodum
Coccinella septempunctata (predator)