种薯不同处理方式对马铃薯疮痂病的影响

Effects of Different Treatments of Seed Potato on Potato Scab

马铃薯疮痂病是重要土传和种传病害,严重威胁马铃薯生产。为探究种薯的不同处理方式对马铃薯疮痂病的影响,以马铃薯品种‘东农310’为试验材料,分别测量3种杀菌剂(70%代森联水分散粒剂、100亿cfu/g枯草芽孢杆菌可湿性粉剂、70%噻虫嗪种子处理可分散粉剂)和滑石粉的添加顺序对病情指数、畸形、出苗率、株高和产量的影响。70%代森联水分散粒剂单独拌种不加滑石粉出苗率最高,为84.00%。不添加滑石粉的药剂拌种处理病情指数低于后添加滑石粉的药剂拌种处理以及药剂与滑石粉一起拌种处理。后添加滑石粉的药剂拌种处理中,70%噻虫嗪种子处理可分散粉剂拌种后加滑石粉,畸形数最低,为166.75个/667m^(2),显著低于对照处理。3种药剂混合拌种后再加滑石粉拌种处理,马铃薯产量最高为2836 kg/667m^(2),显著高于对照处理。研究结果表明,先药剂拌种再添加滑石粉能有效防治马铃薯疮痂病且增产作用明显,研究结果对马铃薯疮痂病防治及科学使用滑石粉拌种具有指导作用。

Potato scab is an important soil-borne and seed-borne disease that poses a significant threat to potato production.To investigate the effects of different treatments for seed potatoes on potato scab,potato variety'Dongnong 310'was selected as the experimental material,and the impact of the order of addition of three germicides(70%Metiram WG,10 billion cfu/g Bacillus subtilis WP and 70%Thiamethoxam ZF)and talcum powder on disease index,tuber deformity,emergence percentage,plant height,and yield were measured.The emergence percentage was the highest,which was 84.00%,when 70%Metiram WG was dressed without talcum powder.The seed dressing treatment without talcum powder showed a lower disease index compared to the seed dressing treatment with talcum powder added later and the seed dressing treatment with germicide and talcum powder mixture.In the treatment where talcum powder was added later,the lowest number of tuber deformity(166.75 pieces/667m^(2))was observed when 70%Thiamethoxam ZF was used,significantly lower than that of the control treatment.When three germicides were mixed with the seeds and then talcum powder was added,the highest tuber yield of 2836 kg/667m²was achieved,significantly higher than that of the control treatment.These results demonstrate that the application of germicide followed by the addition of talcum powder effectively controls potato scab and significantly increases yield,which may provide valuable guidance for the management of potato scab and the proper use of talcum powder for seed dressing.