农抗120应用技术中的几个问题

通过近5年的大量田间试验和20万公顷作物上的防治实践,作者认为农抗120对枯萎病的主要抑菌机理是通过植物体的吸收,在体内产生尚未知的生理生化过程,显著提高植物的抗病和免疫能力。因此,在农抗120应用中应贯彻防重于治的原则。作者对防治瓜、菜枯萎病提出了一套浸种,苗床处理,移栽浇穴,苗期灌根等技术措施,并对施药时机和用药量等因素与防治效果的关系做了详细讨论。文章对农抗120防治其它作物叶部病害及果树腐烂病试验、示范及技术要点也做了说明。还讨论了农抗120使用中应注意的事项。

SOME IMPORTANT ASPECTS OF THE APPLICATION TECHNIQUE FOR AGRICULTURAL ANTIBIOTIC 120

In summarizing the authors' experiences in applying Agricultural Antibiotic 120 (AA120), a product of Streptomyces hygrospinosus var. beijingensis for the control of crop diseases, in over 200,000 ha of crops during the past 5 years, this paper proposes that the main mechanism of disease suppression of AA120 is by enhancing the plant's resistance and immunity against fungal pathogens via some yet unknown internal physiological and/or biochemical processes. Therefore, prevention should be the preferred strategy of application to suppression. A series of application techniques including seed soaking, seedbed treatment, transplanting treatment, root treatment for seedlings, etc. for the control of Fusarium wilt diseases of melons and vegetables were recommended. The paper discussed influence of such factors as delivery technique, dosage and timing for treatments on control effect. Techniques for applying AA120 against foliage diseases are also discussed.