Seasonal abundance and incidence of parasitism of nymphs and adults of brown planthoppers,Nilaparvata lugens(Stål), whitebacked planthoppers,Sogatella furcifera(Horvath), and green leafhoppers,Nephotettix nigropictus(Stål) andN. virescens(Distant), in rice fields were monitored in 12 locations in Laguna Province, Philippines, during the 1983 wet season (July to November) and the 1983–1984 dry season (December to April). Overall percent parasitism was low and variable among seasons and locations.