1971年由中山大学、广东农林学院、广东省昆虫研究所组成的广东省水稻害虫生物防治工作队,与廉江县贫下中农共同研究成功利用赤眼蜂防治稻纵卷叶螟(Cnaphalocrocis medinalis Guenee)。至1972年止,已在广东省65个县(市)开展该项试验共约四万亩稻田。其效果如下:廉江县良垌公社1972年晚稻散放赤眼蜂防治稻纵卷叶螟8,893亩,卵寄生率63—98.5％,卷叶率比未放蜂区下降79.9—96.1％,其中89.7％的放蜂田未施用化学农药,保护了水稻生产。开平县同期试 In 1971, the Guangdong Provincial Pest Insecticide Control Team composed of Sun Yat-sen University, Guangdong College of Agriculture and Forestry, Guangdong Provincial Institute of Entomology and Insect Research, jointly studied with the poor and poor middle peasants in Lianjiang County to successfully control Trichomonas incresseri (Cnaphalocrocis medinalis Guenee) . By 1972, about 40,000 mu of paddy fields had been developed in 65 counties (cities) in Guangdong Province. Its effect is as follows: Lianjiang Liangyun Commune in late rice in 1972, Trichosanthes Trichogramma spraying prevention and control of 8,893 acres of rice leafroller, egg parasitic rate of 63-98.5%, curly leaf rate than the non-bee area decreased 79.9-96.1%, of which 89.7% of the bee-fields did not use chemical pesticides and protected rice production. Kaiping County trial over the same period