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选择当地有代表性、不同轮作方式的地块 ,采用定点定期系统调查的方法 ,对大豆重迎茬种植与胞囊线虫病发生关系进行了研究 ,结果表明 ,随着重茬年限的增加 ,单株胞囊数显著增加 ,从而导致相应的大豆生长发育受抑制 .大豆根瘤数、侧根数降低 ,地上部鲜重下降 ,营养源供应不足 ,使株荚数、株粒数、百粒重显著减少 ,导致减产 17 5 %～ 40 92 %.采用大豆种衣剂 2 6号 ,1号和拌种剂HF -Ⅰ号和HF -Ⅱ号拌种 ,防效均在75 %以上 ,可在生产中应用
Select the local representative, different rotation of the plots, the use of fixed-point regular systematic investigation of the planting of heavy cropping and soybean cyst nematode disease were studied, the results show that, with the increase of the number of continuous cropping, plant The number of cysts increased significantly, which led to the inhibition of the growth and development of corresponding soybean.The number of nodules, lateral roots decreased, the shoot fresh weight decreased, the supply of nutrient source was insufficient, Resulting in a yield reduction of 17 5% ~ 40 92% .With the soybean seed coating agent No. 2, No. 1 and seed dressing HF-Ⅰ and HF-Ⅱ seed dressing, the control effect is above 75%, can be used in the production