Silkworm Wealer (Maruca Restualis). When young, the caterpillar is green. As the ages grow, the color of the caterpillar gradually becomes dark brown. These pests attack the pod by piercing the skin of the pod, then eat the fruit flesh and young seeds in it.
There is a very environmentally friendly way to overcome this pest, ie with ant rangrang. Scientifically, every animal has a natural enemy, in this case reproduce ants rangrang to kill caterpillar pests on the long bean in particular, can be an alternative pesticide exterminator without pesticides.