North Phyongan Province sprayed hundreds of hectares of areas with biological agrochemicals and is pushing ahead with the work to use Trichogramma dendrolimi in a planned way.

Kangso District of Nampho Municipality is exterminating the harmful insects with agrochemicals. Taean District is enhancing the sense of responsibility of forest rangers to spray protection forests and reserves with biological agrochemicals.

Cities and counties of South Hamgyong Province are stamping out forest insects in keeping with their specific conditions.