Grasshopper, cricket menace

Is there any method to control grasshopper and cricket menace in my fields? The chemical sprays that I use for controlling them at regular intervals are not so effective.

L. Gaur

Ludhiana

In Gujarat, farmers control insects such as hairy caterpillar, grass hoppers and mole crickets infesting their crops by digging a trench about 1-1.5 feet depth all around their fields and filling it with water. The insects they say cannot cross this trench filled with water and drown in it. – Source Honeybee- 2(1):15, 1991