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棉花蓝病害 ( blue disease,BD)于 2 0世纪80年代初期在越南首次发生 ,1 0多年后即成为棉花主要病害。罹病棉株表现为发育迟缓、矮小、叶片向下卷曲 ,产量和品质严重下降。蓝病害在越南产棉省宁城、平顺、平福的发病最重。该病为棉蚜携带病毒 ,其转主寄主有黄花稔 ( Sida acuta)、白背黄花稔 ( Sida rhombifolia)和玫瑰茄 ( H ibiscussabdariffa)等。这些转主寄主和滞留在田间的棉杆残体等是病害的传染源。单项防治措施有清洁棉田 ,适时播种 ,与绿豆或玉米轮作 ,叶面喷药 ,用“高巧”进行种子包衣等。综合防治措施为 :每公斤种子用 70水剂高巧 5g( imidachloride有效剂量3 .5g· kg- 1)包衣并与绿豆轮作 ,及所有措施同时应用
Blue disease (BD) first occurred in Vietnam in the early 1980s and became the major cotton disease after more than 10 years. Affected cotton plants showed sluggishness, short stature, curly leaves curled down and severely reduced yield and quality. Blue disease in the cotton producing province of Vietnam Ningcheng, smooth, flat-blessing the most serious. The disease is aphids carrying the virus, the main hosts are Sida acuta, Sida rhombifolia (Sida rhombifolia) and Roselle (H ibiscussabdariffa) and so on. These turn the main host and stay in the field of cotton stump remnants of disease is the source of infection. Single control measures are clean cotton fields, timely sowing, and mung bean or corn rotation, foliar spray, with “high precision” for seed coating. Integrated control measures are as follows: Each kilogram of seed is coated with 5g (effective dose of imidachloride 3.5g · kg-1) of 70g of water and mixed with mung bean and all the measures are applied at the same time