Efficacy of plant extracts, herbs in a rich brown planthopper concentration of 25% (w/v), found that the tobacco extract is effective in repelling the Brown planthopper best rate equal to 10%, chasing after the Brown planthopper release for 24 hours and found that the extract, tobacco is effective in repelling the Brown planthopper best rate of the Chase, equal to 10% after dropping Brown planthopper, a 24-hour time.
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