Development of faba bean diseases depending on the sowing time | Lauka pupu slimību attīstība atkarībā no sējas laika
2018
Augulis, K., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Agriculture | Belkus, S., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Agriculture | Bimsteine, G., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Agriculture
Faba beans (also called field beans, broad beans, fava beans), which are a good source of protein, are mainly grown for seed production and are used for food and for animal feed. Usually, faba beans are included in crop rotation systems to improve soil fertility. Leaf spot caused by Botrytis spp. is the dominant faba bean disease in Latvia. Leaf spots caused by Alternaria/Stemphylium and Didymella fabae, and rust caused by Uromyces viciae-fabae are observed almost every year. In 2017, also downy mildew caused by Peronospora viciae was observed. The aim of the present study was to investigate the development of faba bean diseases depending on varieties (‘Laura’, ‘Boxer’, ‘Isabell’) and sowing time (April 21, April 29, May 8). Observations were carried out at the Research and Study farm “Peterlauki” of the Latvia University of Life Sciences and Technologies in 2018. Disease severity (0–9 point scale) on leaves was observed after the appearance of first symptoms till the end of vegetation season, and the values of AUDPC were calculated. In 2018, leaf spot caused by Botrytis spp. was the dominant disease and its development was dependent on varieties and the sowing time (p is less than 0.001). The incidence of leaf spot caused by Stemphylium spp. was higher than the incidence of leaf spot caused by Alternaria spp. Rust was observed only at the end of growing season (BBCH 80) – on beans sown in May.
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