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为探明南方水稻黑条矮缩病的综合防控关键技术,从品种抗性筛选和药剂防治方法两方面开展了研究。于2011年在全省4个县对54个中、晚稻品种进行了田间抗性鉴定,结果表明:水稻品种之间的抗性有较大的差异,平均病丛率在0.5%以下的有岳优9113等7个品种,为相对抗(耐)病品种;平均病丛率在0.51%~2.99%的有金优77等42个品种;平均病丛率在3.0%以上的有金佳丝苗等5个品种,为相对感病品种。2012年在全省3个县开展了不同药剂及不同使用方法的田间药效试验,结果表明:南方水稻黑条矮缩病防治的有效方法是使用25%吡蚜酮可湿性粉剂药剂拌种(20 g/kg种子)、移栽前2 d和移栽后15 d各使用25%吡蚜酮喷雾1次(每667 m220 g);不采用药剂拌种或者低剂量拌种(25%吡蚜酮10 g/kg种子)的防效均显著地低于该药剂20 g/kg种子剂量拌种的防效;2%宁南霉素水剂单独使用时对南方水稻黑条矮缩病的防效较差,且与25%吡蚜酮混合使用后,并没有显著性地提高防效。
In order to find out the key technologies of comprehensive prevention and control of rice black-streaked dwarf disease in southern China, the research was carried out from two aspects of variety resistance screening and drug control methods. In 2011, 54 middle and late rice varieties in four counties in the province were field-tested for resistance. The results showed that there was a significant difference in resistance among rice cultivars, and the average disease rate was less than 0.5% The results showed that there were 42 varieties with Jinyou 77 and other varieties with the average disease rate ranging from 0.51% to 2.99%. The average disease rate was above 3.0% A variety of relative susceptible varieties. In 2012, the field trials of different medicaments and different methods were carried out in three counties in the province. The results showed that the effective method of preventing and curing black-streaked dwarf diseases in southern China was to use 25% pymetrozine wettable powder agent seed dressing 20 g / kg of seed), 2 days before transplanting and 15 days after transplanting, spraying with 25% pymetrozine (1 g per 667 m2); without using seed dressing or low dose dressing (25% Ketone 10 g / kg seed) were significantly lower than the control effect of 20 g / kg seed dose of the agent; when used alone, 2% nanninmycin agent had no effect on rice black-streaked dwarf disease in southern China Effect is poor, and mixed with 25% pymetrozine, did not significantly improve the control effect.