Na-ewebata ngwaahịa ọhụrụ anyị, ihe na-efesa pesticide ọhụrụ emebere iji gboo mkpa ndị ọrụ ugbo, ndị nwe ihe ọkụkụ na ndị ọzọ.Igwe ihe ọkụkụ a na-eme nke ọma bụ ngwá ọrụ zuru oke maka ịgbasa pesticides n'elu osisi toro ogologo dị ka walnuts, chestnuts, ginkgos na poplars, ma gosipụtakwara na ọ bara uru na mpaghara osikapa, ebe ndị ọrụ nwere ike ịrụ ọrụ na ridges na-enweghị iwu. banye n'ọhịa n'onwe ha.