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Effect of the hydroalcoholic extracts from plants on Colorado beetle (Leptinotarsa decemlineata Say.). Note II

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Author(s): MORAR G. | Camelia SÎRBU | I. OLTEAN

Journal: Proenvironment Promediu
ISSN 1844-6698

Volume: 1;
Issue: 2;
Start page: 46;
Date: 2008;
Original page

Keywords: organic potato | natural extracts

ABSTRACT
Twenty eight products, obtained from plant extracts, were used to fight against Colorado bug, on theterms of ecological agriculture. It was noticed that: 1. Vegetal extract may serve as an alternative to fightingagainst Colorado bug in potato cultivars, especially at those which are designated to obtain an ecological crop;2. The best result in fighting against Leptinotarsa decemlineata Say. were obtained with extract fromChrysanthemum cinerariaefolium Trev., Chrysanthemum balsamita var canfora and Ruta corsica, all in usedconcentration of 20%.The treatment efficiency against larvae of 99,01 %, 93,06 % and 96,83 %, efficiencywhich are comparable with those obtained with the help of synthesis insecticide; 3. The lowest result wereobtained with extracts from Artemisia absinthium L., Taracxacum officinale L. and Tagetes erecta L., efficiencyof 7,14 % and 72,22 %; 4. The extracts from Artemisia absinthium L., Taracxacum officinale L. and Tageteserecta have repulsive effect for adults, these avoiding for punting on plants treated with these extracts.

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