THE SPREAD OF ERYSIPHE-GRAMINIS F-SP HORDEI IN MIXTURES OF BARLEY VARIETIES
THE SPREAD OF ERYSIPHE-GRAMINIS F-SP HORDEI IN MIXTURES OF BARLEY VARIETIES
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DOI：
10.1111/j.1365-3059.1984.tb00592.x
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发表时间：
1984-01-01
期刊：
影响因子：
2.7
通讯作者：
WOLFE, MS
中科院分区：
文献类型：
--
作者：
CHIN, KM;WOLFE, MS
提出了可能影响 E. graminis f 进展的机制模型。 sp。大麦品种混合物中的大麦芽。两次田间试验的结果表明，混合物的影响可分为三类：易感植物密度降低的影响、抗性植物的屏障效应以及无毒病原体生物型引起的抗性。在植物生长的早期阶段，易感植物密度较低是混合物中病原体发育减少的主要原因。随着疫情的发展，屏障效应和诱导抗性效应的重要性不断增加，总混合效应在疫情发展的中途达到最大。试验快结束时，尽管诱导抗性的影响达到最大，但总体混合效果下降。讨论了这些变化的原因及其对使用宿主品种混合物进行疾病控制的影响。混合物还可以保护作物免受目标生物体以外的病原体的侵害。
A model is proposed of mechanisms which might affect the progress of E. graminis f. sp. hordei in mixtures of barley varieties. Results obtained from 2 field trials indicate that the effect of mixtures may be partitioned into 3 categories: the influence of the reduced density of the susceptible plants, the barrier effect of the resistant plants and the induced resistance due to the non-virulent pathogen biotypes. In the early stages of plant growth the lower density of susceptible plants accounted for most of the reduction in pathogen development in mixtures. As the epidemic progressed, the barrier and induced resistance effects increased in importance and the total mixture effect was at a maximum mid-way through epidemic development. Towards the end of the trials the overall mixture effect declined though the influence of induced resistance was at its maximum. The reasons for these changes and their implications for the use of host varietal mixtures in disease control are discussed. Mixtures also protected the crop against a pathogen other than the target organism.