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Investigation of Tannin Crude Extract from Cassava Leaves for Mealy Bug Control

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Different concentrations of tannin crude extract from cassava leaves were used for direct spraying, dipping, choice and no-choice repellent test for controlling cassava mealy bug (Pseudococcus jackbeardsleyi Gimpel and Miller). By direct spray method, it was showed that tannin crude extract could not kill cassava mealy bug as insecticide but remarkably repelled mealy bug. Dipping method at 1,500 mg/l tannin concentration could only kill the mealy bug of 7.4% and seemed to decrease plant damage of 32.52% when compared with control. Field experiment revealed that spraying with 1,000 mg/l tannin extract concentration could keep cassava clean, less damaging of mealy bug as well as cassava could promote new apical bud, axially growth and straight trunk. It was wondering that extract from cassava leaves could be used as cassava mealy bug repellant.
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Document Type: Research Article

Publication date: December 1, 2013

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  • ADVANCED SCIENCE LETTERS is an international peer-reviewed journal with a very wide-ranging coverage, consolidates research activities in all areas of (1) Physical Sciences, (2) Biological Sciences, (3) Mathematical Sciences, (4) Engineering, (5) Computer and Information Sciences, and (6) Geosciences to publish original short communications, full research papers and timely brief (mini) reviews with authors photo and biography encompassing the basic and applied research and current developments in educational aspects of these scientific areas.
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