Neīstā miltrasa – nozīmīga slimība sojas sējumos Latvijā = Downy mildew – an important disease of soybeans in Latvia
2023
Petrova, Irīna | Bimšteine, Gunita | Bankina, Biruta
Soybeans (Glycine max) are one of the most important and widely cultivated legumes in the world, and used as a high-quality protein source in food and feed production. Soybean development and yield are affected by harmful organisms: weeds, pests and diseases. In recent years, soybean downy mildew caused by Peronospora manshurica has been frequently observed. Disease symptoms are more often observed on the leaves, but seeds can also be affected. The aim of the study is to evaluate the development of soybean downy mildew in the Kurzeme region and to describe the symptoms of the disease and its causal agent. The development of diseases, including downy mildew, was assessed in the vegetation season of 2023 in two different fields – in experimental field where variety ‘Laulema’ (bred in Estonia) was used, and in the production field where variety ‘Erika’ (bred in Poland) was used. First symptoms were observed on soybeans at GS 30 in both places. At the end of the growing season, the severity of downy mildew increased to 50% and 70% depending on the field. Plant rotation is an important disease control measure, as oospores can persist and survive in plant debris.
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出版者 Latvijas Biozinātņu un tehnoloģiju universitāte
