3.Damage 1)Hosts Brown planthopper is monophagous.Only feeds on rice and common wild rice(普通 野生稻). White backed planthopper is oligophagous. It mainly damages rice and other crops and weeds of Gramineae(禾本科). Small brown planthopper is polyphagous. 1) Hosts 1) Hosts Brown planthopper planthopper is monophagous monophagous. Only feeds on rice and common wild rice ( feeds on rice and common wild rice (普通 野生稻). White backed White backed planthopper planthopper is oligophagous oligophagous. It mainly damages rice and other crops It mainly damages rice and other crops and weeds of and weeds of Gramineae Gramineae (禾本科). Small brown Small brown planthopper planthopper is polyphagous polyphagous. 3. Damage 3. Damage