Effect of aqueous extracts of Cabralea canjerana subsp. polytricha (Adr.Juss.) Penn. (Meliaceae) in the biological control of Brevycorine brassicae (L.) (Hemiptera:Aphididae) and Ascia monuste orseis (Godart) (Lepidoptera: Pieridae)

by Freitas da, Rosely Ferreira

Abstract (Summary)
This work was performed to test the effect of aqueous extract of Cabralea canjeranasubsp. polytricha (Meliaceae) in the control of Brevycorine brassicae (Hemiptera: Aphididae)and Ascia monuste orseis (Lepidoptera: Pieridae). Extract of leaves, fruits and seeds of 3, 5 and10% were obtained through infusion of dry and triturated material in distilled water filtered after24 hours. The effect of the extracts was tested in the survival of B. brassicae and the viability,larval and pupal weight and repellent/antifeedant activity of A. monuste orseis. Extract of 3 and5% did not demonstrated insecticide action on B. brassicae. However, extract of 10% ofconcentration was able to control this insect in laboratory conditions. The larvae of A. monusteorseis demonstrated low viability when treated with leaves immersed in the extracts, dying beforecompleting four days of age, on average. The evaluation of the repellent/antifeedant effect of theextract indicates that, in tests with choice, the individuals tend to avoid leaves treated with seedsextracts. Differences in consumed area were only demonstrated in the tests using extract of 10%.However, cabbage leaves immersed in fruits and seeds extracts presented a lower consumed area.Tests without choice indicate that when extract of 5 and 10% were used, cabbage leavesconsumption was reduced.
This document abstract is also available in Portuguese.
Bibliographical Information:

Advisor:Júlio Mendes; Elenice Mouro Varanda; Cecilia Lomônaco de Paula

School:Universidade Federal de Uberlândia

School Location:Brazil

Source Type:Master's Thesis

Keywords:Biological control Insecticides plants


Date of Publication:02/15/2007

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