Survival of the Exserohilum rostratum causal leaf spot of wheat and dissemination, infection behaviour from flower-seed-seedlings

IF 1.6 4区 农林科学 Q2 AGRONOMY Cereal Research Communications Pub Date : 2024-09-06 DOI:10.1007/s42976-024-00575-7
Tulasi Korra, Thirunarayanan P., Ram Chandra
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Abstract

The experiment was conducted on the survival of Exserohilum rostratum through different sources i.e. soil, plant debris, and seed and also observed the infection percentage from wheat flower to seed. It was found that the survival of E. rostratum frequency varied in soil from (0.00–29.29%), plant debris (0.97–27.17%) and seed (3.26–24.80%). The maximum temperature, relative humidity (RH, morning), and rainfall were negatively correlated, while the minimum temperature and relative humidity (RH, evening) were positively correlated with the survival of the pathogen. The dissemination infection percentage on the palea in WAMI1 of (63.33%) was higher, followed by Lemma in WAMI 10 (40.74%) and the least transmission in Glume of (29.63%) in both WAMI-8 and WAMI-9, respectively. The seedling infection on susceptible variety showed black spots with blighted appearance lesions on primary leaf and histopathological test conducted on post-anthesis stage. The purpose of the investigation is to understand the survival of the pathogen in the absence of host and floral infection biology. Furthermore, this information is useful for integrated disease control measures in the future.

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小麦叶斑病病原菌 Exserohilum rostratum 的存活和传播,以及从花-种子-幼苗的感染行为
实验研究了土壤、植物残体和种子等不同来源中罗斯特菌(Exserohilum rostratum)的存活率,并观察了从小麦花朵到种子的感染率。结果发现,E. rostratum 在土壤(0.00-29.29%)、植物碎屑(0.97-27.17%)和种子(3.26-24.80%)中的存活率各不相同。最高温度、相对湿度(RH,早晨)和降雨量与病原体的存活率呈负相关,而最低温度和相对湿度(RH,傍晚)与病原体的存活率呈正相关。在 WAMI-8 和 WAMI-9 中,WAMI1 在内稃上的传播感染率(63.33%)较高,其次是 WAMI 10 中的 Lemma(40.74%),在颖果上的传播感染率(29.63%)最低。易感品种的幼苗感染后,初生叶上会出现黑斑,并伴有枯萎病,组织病理学检测在花后阶段进行。调查的目的是了解病原体在无寄主情况下的存活率和花卉感染生物学特性。此外,这些信息还有助于今后采取综合病害防治措施。
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来源期刊
CiteScore
3.40
自引率
6.20%
发文量
92
审稿时长
6-12 weeks
期刊介绍: This journal publishes original papers presenting new scientific results on breeding, genetics, physiology, pathology and production of primarily wheat, rye, barley, oats and maize.
期刊最新文献
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