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水稻纹枯病(Pellicularia Sasakii)是水稻三大病害(稻瘟病、白叶枯病,纹枯病)之一,辽宁主要稻区普遍发生,为害较重。近年来且有发展趋势。目前防治此病使用的农用抗菌素——井岗霉素,效果显著,一般防治效果可达90%以上。为了了解水稻纹枯菌是否存在对井岗霉素的自然耐性菌,避免连年使用产生药效减迟现象,我们于1978年和1979年分别在本省重点稻区收集了水稻纹枯病标样,进行室内分离培养和测定。以期为今后推广使用井岗霉素提供理论依据。试验材料试材为辽宁主要稻区的水稻纹枯病标本。1978年有沈阳、东沟、新民、大洼、铁岭等五个市县八个点的标样。1979年有沈阳、铁岭、大洼、东沟、营口、庄河等六个市县二十六个点的标样。以上标样放置室温下保存备用。测定用井岗霉素为本溪糖厂1978年生产的发酵液,效价为一万纹枯单位,放冰箱(4℃)保存备用。
Rice sheath blight (Pellicularia sasakii) is one of the three major diseases of rice (rice blast, bacterial blight, bacterial blight), the main rice area in Liaoning common occurrence, serious damage. In recent years and there are trends. At present, the disease prevention and treatment of agricultural antibiotics - Jinggangmycin, the effect is significant, the general control effect of up to 90%. In order to know whether rice rhizoctonia has the natural tolerance to Jinggangmycin and to avoid the delay effect of pesticide use in successive years, we collected the standard samples of rice sheath blight in the key areas of Shaanxi province in 1978 and 1979 respectively, Indoor separation culture and determination. In order to promote the use of Jinggangmycin provide a theoretical basis. Test material The test material is rice sheath blight specimen in Liaoning’s main rice area. In 1978, Shenyang, Donggou, Xinmin, Dawa, Tieling and other five cities and counties eight standard samples. 1979 Shenyang, Tieling, Dawa, Donggou, Yingkou, Zhuanghe six cities and counties sixteen standard samples. The above standard samples were stored at room temperature for later use. Determination of Jinggangshan used Benxi sugar factory production of fermented broth in 1978, the potency of 10,000 grain withered unit, put the refrigerator (4 ℃) to save backup.