CAJ | 학술논문

在田间分别设计6个小麦品种单播及其9个组合混播小区, 研究条锈病在小麦混播群体中的发生、扩展情况及品种混播对条锈病的控制效果.结果表明, 苗期品种混播小区发病中心的数量明显减少, 条锈病发病中心越冬率达77.78%, 单片病叶也可越冬.品种混播降低了条锈病传播距离, 条锈病在各小区呈中心式分布.品种混播在孕穗期的相对防效为16.25%～58.89%, 平均为35.31%.相对防效以"陕138"和"西农979"品种混播及"陕138"、"小偃22"和"西农889"品种混播最高, 分别达58.89%和52.19%.品种混播对小麦条锈病有较好的控制效果, 可作为生态防病措施之一.
재전간분별설계6개소맥품충단파급기9개조합혼파소구, 연구조수병재소맥혼파군체중적발생、확전정황급품충혼파대조수병적공제효과.결과표명, 묘기품충혼파소구발병중심적수량명현감소, 조수병발병중심월동솔체77.78%, 단편병협야가월동.품충혼파강저료조수병전파거리, 조수병재각소구정중심식분포.품충혼파재잉수기적상대방효위16.25%～58.89%, 평균위35.31%.상대방효이"협138"화"서농979"품충혼파급"협138"、"소언22"화"서농889"품충혼파최고, 분별체58.89%화52.19%.품충혼파대소맥조수병유교호적공제효과, 가작위생태방병조시지일.
Six mono-cultivar planting treatments and nine mixed-cultivar planting treatments were designed to study the occurrence and expansion of wheat stripe rust (Puccinia striiformis f. sp. tritici) and control effect of mixed-cultivar planting. The results indi-cate that the number of foci at seedling stage obviously reduces under mixed-cultivar planting compared with mono-cultivar planting. Over-wintering rate of foci is 77.78% and a few single diseased leaves survive after winter. The spreading distance of stripe rust is shorten on mixed-cultivar plots. Stripe rust shows a trait of central distribution in different plots. Relative efficacy of mixed-cultivar planting at booting stage ranges from 16.25% to 58.89%, with a mean value of 35.31%. "Shaan 138" and "Xinong 979" mixed-planting, and "Shaan 138", "Xiaoyan 22" and "Xinong 889" mixed-planting show the highest relative efficacy, which is 58.89% and 52.19% respectively. Mixed-cultivar planting has a higher control effect on wheat stripe rust than mono-cultivar planting. Mixed-cultivar planting can thus be used as a good ecological measure in disease prevention and control.