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不同剂量的280 g·L-1异噻菌胺·肟菌酯悬浮种子处理剂拌种组合75%肟菌酯·戊唑醇水分散粒剂用药2次防治稻瘟病小区试验结果显示,280 g·L-1异噻菌胺·肟菌酯悬浮种子处理剂20 m L·kg-1拌种组合75%肟菌·戊唑醇水分散粒剂用药2次对稻瘟病防治效果最佳,叶瘟防效89.4%,穗颈瘟防效61.5%,方差分析显示,该处理穗颈瘟防效与其他处理的差异均达到极显著水平。试验结果还表明,异噻菌胺·肟菌酯悬浮种子处理剂拌种对叶瘟具有预防效果,防效随着拌种浓度的递增而增大,但对叶瘟后期的防治效果不佳,且对穗颈瘟无防效。建议稻瘟病重发地区以280 g·L-1异噻菌胺·肟菌酯悬浮种子处理剂20 m L·kg-1拌种,并在分蘖末至拔节期、破口前用75%肟菌·戊唑醇水分散粒剂用药2次,用药量分别为150和225 g·hm-2。
Different dosages of 280 g · L-1 isothiocyanate · trifloxystrobin suspension seed treatment agent dressing combination 75% trifloxystrobin · tebuconazole water dispersible granule medication 2 times to control rice blast cell plot test results showed that 280 g · L-1 isothiocyanate · trifloxystrobin suspension seed treatment agent 20 m L · kg-1 dressing mix 75% oxime bacteria · tebuconazole water dispersible granules 2 times the best control of rice blast, leaf 89.4% of blast control efficiency and 61.5% of panicle blast control efficacy. Analysis of variance showed that the difference between the control effect of panicle blast control and other treatments reached extremely significant level. The test results also showed that the suspension treatment with isothiocyanate and trifloxystrobin seed dressing had a preventive effect on leaf blast, the control effect increased with the increasing seed dressing concentration, but the control effect was not good at the late stage of leaf blast, And no control effect on panicle blast. It is suggested that 280 m L.L-1 isothiocyanamycin trifloxystrobin suspended seed treatment agent 20 m L · kg-1 was planted in the recurrent area of rice blast, and 75% oxime Bacteria and tebuconazole water-dispersible granules were used twice, the dosage was 150 and 225 g · hm-2.