Häseli, Andreas and Zingg, Daniel (2004) Wirkung des Quassiapräparates "Quassan" gegen die Sägewespe. [Effect of Quassan, a Quassai product, against Sawflies (Hoplocampa testudinea).] Paper at: 11th International Conference on Cultivation Technique and Phytopathological Problems in Organic Fruit-Growing, Weinsberg, Deutschland, 03.-05.02.2004.
Since reduction in effectivity of the bitter wood preparation Quassan in the years 1999 and 2000, the quality of the product had to be criticised. Quality control has since been improved, in so far as each batch is now tested in a biotest on aphids before dispatch. Parallel to its normal use in the field, the effect of Quassan was also field tested in 2001 against apple sawflies. Quassan was tested in different concentrations per hectare and the effect compared with an untreated control as well as with plots treated with a self-cooked Quassiawood extract. All the methods showed an efficacy of 80% or more as compared with the control. Differences due to concentration per hectare used were only minimal.
|EPrint Type:||Conference paper, poster, etc.|
|Type of presentation:||Paper|
|Keywords:||Sawfly, Hoplocampa testudinea, Quassia, Bioobstbau, Beratung|
|Subjects:|| Crop husbandry > Production systems > Fruit and berries|
Crop husbandry > Crop health, quality, protection
|Research affiliation:||Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Crop Production|
|Deposited By:||Häseli, Andreas|
|Deposited On:||07 Jun 2004|
|Last Modified:||12 Apr 2010 07:29|
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