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在室内离体条件下，对不同日龄的棉铃用孢子液浸铃法接种铃疫病菌、黑果病菌和炭疽病菌。结果表明，不同日龄的棉铃抗病性表现了较大差异，其病铃率和病情指数以开花后 １０ ｄ 左右的棉铃最低，其次是 １５ ｄ 的棉铃，２５ ｄ 的棉铃表现也较低，而蕾、幼龄（５ ｄ 左右）和高龄（３５ ｄ 以上）的棉铃接种后，病铃率和病情指数均较高。此外，铃疫病菌采用菌丝块贴铃法，黑果病菌和炭疽病菌采用孢子液浸铃法，在室内离体条件下对中棉 １０、中棉 １２、岱 １５、盐棉 ４８、苏棉 １ 号、泗棉 ２ 号、苏农 ８２０１ 等 ７ 个棉花品种（系）进行了抗病性测定。结果表明无免疫或高抗品种，但不同品种对这三种铃病的抗病性存在着较大差异。对铃疫病抗性较好的为泗棉 ２ 号，其次为盐棉 ４８、中棉 １２。对黑果病抗性较好的有岱字棉 １５、泗棉 ２ 号和中棉 １２。对炭疽病、无伤接种时表现较好的为岱字棉 １５，其次为中棉 １２ 和泗棉 ２ 号。
Under the conditions of in vitro culture, the bollworm strains, the black fruit germs and the anthracnose bacteria were inoculated with the spore liquid of different age bolls. The results showed that the disease resistance of cotton bolls at different ages showed great difference. The boll rate and disease index of cotton bollworm were the lowest on the 10th day after flowering, followed by the boll on the 15th day and the cotton boll on the 25th day were lower, However, the boll rate and disease index of buds, young (about 5 d) and old (over 35 d) cotton bolls were higher. In addition, Phytophthora pulcherrimus using mycelium paste bell method, black fruit germs and anthracnose bacteria using spore liquid immersion bell method, under indoor conditions in the cotton 10, cotton 12, Dai 15, salt cotton 48, Su cotton 1, Simian 2, Suonong 8201 7 cotton varieties (lines) were tested for disease resistance. The results showed no immune or high resistance varieties, but different varieties of the three bell disease resistance are quite different. The resistance to bell blight is better Simian 2, followed by salt cotton 48, cotton 12. Better resistance to blackberry disease Dai word cotton 15, Simian 2 and cotton 12. On anthracnose, no injury when inoculated better performance Dai word cotton 15, followed by cotton 12 and Simian 2.