去年8月,石家庄地区发动农民,在稻蝗产卵前,从7万亩稻田中共捕捉稻蝗40吨。这样不仅大大减轻了当年稻蝗为害,据9月下旬调查,捕捉稻蝗的乡、村,稻田每平方米有稻蝗1.5—3头,虫口密度下降95.7—97.5％,而且捕捉的稻蝗经过加 In August last year, peasants were mobilized in Shijiazhuang area to capture 40 tons of rice locusts from 70,000 acres of paddy fields before spawning rice locusts. This not only greatly reduced the damage of rice locusts that year, according to the survey in late September to capture the locusts, towns and villages, paddy rice per square meter has rice locust 1.5-3 head, population density decreased 95.7-97.5%, and caught Locust plus