小麦纹枯病态势与产量关系的研究  

STUDIES ON THE RELATIONSHIP BETWEEN Rhizoctonia cerealis EPIDEMIC PATTERNS AND YIEID OF WHEAT

作　　者：闵跃中 陈宇[2] 

机构地区：[1]江西南昌市蔬菜科研所 [2]西南农业大学植保系,重庆630716

出　　处：《西南大学学报（自然科学版）》1993年第2期27-30,共4页Journal of Southwest University(Natural Science Edition)

摘　　要：用人工接种小麦纹枯病菌,研究不同小麦纹枯病态势与产量的关系.结果表明,纹枯病导致产量损失最大的时期为小麦的孕穗期。孕穗期病级高,不但严重降低千粒重而且减少穗粒数。千粒重的降低是由于籽粒成熟延迟,可溶性糖和淀汾含量降低所致。Artificial inoculation was made of shesth blight (Rhizoctonia cerealis) on wheat at va- rious development stages of the crop.Changcs in well-filled kernel number per ear and 1,000-grain-weight on diseased plants indicatcd that the occurrence of the disease at car-bearing stage would lead to the greatest yield loss.Shcath blight of wheat delayed maturation by about 10 days.Measurements of soluble sugars and starch in developing grainsat 3-day intervals indicated that their contents were lower on heavily diseased plants (with a disease index of 84%) than on medium-diseased (disease index being 41%) and dis- case-free plants.

关 键 词：小麦 纹枯病 产量 

分 类 号：S435.121.49[农业科学—农业昆虫与害虫防治]