So, apparently, Plant Extracts are effective against insects. which are similar to the results from Rejesus (1987) Heart-leaved moonseed is effective as an insecticide. The absorption spectrum showed that the percent mortality of brown planthopper.And the extract of neem and derris are highly effective against the Nymhs of brown planthopper. Both methods exposed and how to eat dead at a concentration of 10% or more (Phethatai, 1994).
The extract from tobacco, siam weed and eucalyptus, No report control brown planthopper