Control of Hoplocampa testudinea using the extract from Quassia amara in organic apple growing
作者： V. Psota , J. Ouředníčková , V. Falta
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摘要: Psota V., Ouřednickova J., Falta 2010. Control of Hoplocampa testudinea using the extract from Quassia amara in organic apple growing . Hort. Sci. (Prague), 37: 139-144. In 2008 and 2009 effects quassin neoquassin (oxygenated triterpenes) on sawfly ( tes- tudinea Klug, 1814) were studied. Czech Republic, monitoring was carried out small-plot trials one laboratory experiment. The containing made by boiling wood chips a tropical shrub L. (Sapindales : Simaroubaceae). experimental dosages 3, 4.5, 6, 9.25 kg chips/ha. Spray treatment with quassia just before most larvae hatched out. It statisti - cally proven that Q. reduced infestation fruitlets. Extract dosage corresponding to 3-4.5 for 1/ha appeared as optimal. efficacy these approximately 40-50%, above 80% record.
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