Efficacy of extracts from medicinal plants to control BPH. The experiment was performed at the building. Department of Entomology Kasetsart University, Nakhon Pathom From March - May 2559 extracted from the wormwood plant, neem, tobacco, odoratum, Hang Lai, Yak and eucalyptus. The fermentation method At a concentration of 25% (w / v) for 5 days, then sprayed onto crops of 3 over 10 treatments included control third process is water, alcohol and sulfur light showed that the extract from the plant process. effective in chasing BPH best. Chasing a percentage equal to 10% and an extract of eucalyptus. Effective in chasing a minimum. Chasing a percentage equal to 7.21% at 24 hours for seven days.