Swarms of grasshoppers are threatening crops in many localities in the northern mountainous province of Cao Bang.

The worst affected are Hoa An and Thong Nong districts, with 11 out of 21 communes and towns in Hoa An, and 7 out of 11 communes in Thong Nong reporting large numbers of the insect.

The grasshoppers are swarming along banks of streams and rivers, with an average density of 200-300 individuals per square meter, and even 1,000-1,500 grasshoppers every square meter in some locations, according to local authorities.

The pests have destroyed 12 hectares of plants, and start attacking corn and rice fields.

The province has set up a steering committee to coordinate efforts to deal with the pests.-VNA