70%敌磺钠SP对甜菜苗期立枯病预防效果

Prevention Effect of 70% Fenaminosulf SP on Sugarbeet Seedling Damping Off

通过试验,明确了70%敌磺钠SP拌种对甜菜苗期立枯病具有较好的防效,增产效果显著,防效随药量的增加而提高,其最高株防效和病指防效可达82.7%和86.3%,最高增产率达15.4%;当用量达到0.75kg/100kg种子以上时,会影响甜菜的出苗率,但对已出苗的甜菜生长无影响。从经济、安全因素考虑,建议用量为0.5kg/100kg种子,施药方法为兑水5kg拌种,堆闷3~4h,阴干20h后播种。

By experiment, seed dressing with the 70% fenaminosulf SP had good control effect on sugarbeet seedling damping off, and remarkable effect of root yield of sugarbeet. The control effect increased with the increase of the fungicide dosage, the highest control efficacy of plant and disease index were up to 82.7% and 86.3%, and increase rate of root yield was 15.4%; When fungicide dosage was above 0.75 kg/100kg seeds, it would affect the rate of sugarbeet germination while no influence on the growth of beet. The recommended dosage of 70% fenaminosulf SP for economic benefits and security was 0.5 kg/100kg seed mixed with 5 kg water, to stack stuffy 3 - 4 h, then sow after dried 20 h.