Wereng Hama there are several kinds of which are brown planthopper, green leafhoppers and wereng loreng. This animal is very comfortable living in humid and temperate areas around 20oc -30 oc.
[The picture show brown planthopper]
For the control you can use Jajar Legowo planting system to cope with planthopper pests, because rice fields that use the system of planting row legowo not moist, because it is not aphids pests to live with rice fields that are not moist and temperatures rather hot because penny.