So, apparently, plant extracts, effective in defense of the brown planthopper, which are similar to the effects of Rejesus (1987) reported. Wormwood has the effect of a pesticide by acting a absorbed, it was found that the mortality aphids jump Brown is reduced, and the extract of neem Derris and high efficiency with the embryo of Brown Planthopper and how to touch and how to eat dead at 10% above (diamond,,, 1994).
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