Effects of Yellow Spot on Wheat: Comparison of Epidemics at Different Stages of Crop Development
Effects of Yellow Spot on Wheat: Comparison of Epidemics at Different Stages of Crop Development
复制标题
黄斑病对小麦的影响：作物不同发育阶段流行情况的比较
DOI：
--
复制
发表时间：
1983
期刊：
影响因子：
--
通讯作者：
G. Platz
中科院分区：
文献类型：
--
作者：
R. Rees;G. Platz
在田间试验中研究了小麦黄斑病（Pyrenophoua tuitici-repentis）对两个小麦品种（Banks和Olympic）的影响。拔节前严重的黄斑病使分蘖和干物质产量均降低，拔节时叶面积指数显著降低。拔节后严重的病害降低了开花时的叶面积指数、成熟时的植株干重和收获指数。作物物候也发生了变化，早期病害推迟了开花，晚期病害加快了作物成熟。当黄斑病始终严重时，灌浆期大大缩短。Banks的籽粒产量比对照降低了c. 13%由早期疾病，C。35%为晚期疾病，以及c. 48%在整个作物季节受到疾病的影响。大部分的损失是在减少晶粒尺寸。虽然奥林匹克的收益率损失小于银行，但奥林匹克的抵抗力不足。
Effects of yellow spot (Pyrenophoua tuitici-repentis) on two cultivars (Banks and Olympic) of wheat have been examined in a field experiment where distinctly different epidemics were produced in various treatments. Severe yellow spot before jointing reduced production of both tillers and dry matter, and substantially lowered leaf area index at jointing. Severe disease after jointing reduced leaf area index at flowering, dry weight of plants at maturity and harvest index. Crop phenology was also modified, with flowering being delayed by early disease and crop maturity hastened by late disease. Where yellow spot was severe throughout, the grain-filling period was greatly reduced. Grain yield of Banks was reduced by c. 13 % by early disease, c. 35 % by late disease, and c. 48 % by disease throughout the crop season. Most of the loss was in reduced grain size. Although yield loss in Olympic was less than in Banks, the resistance of Olympic was shown to be inadequate.