Blackleg Yield Losses and Interactions with Verticillium Stripe in Canola (<i>Brassica napus</i>) in Canada
Blackleg, caused by <i>Leptosphaeria maculans</i>, is an important disease of canola (<i>Brassica napus</i>). The pathogen can attack stems, leaves and pods, but basal stem cankers are most damaging and can result in significant yield losses. In Canada, Verticillium stripe (&...
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MDPI AG
2023-01-01
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Online Access: | https://www.mdpi.com/2223-7747/12/3/434 |
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author | Yixiao Wang Stephen E. Strelkov Sheau-Fang Hwang |
author_facet | Yixiao Wang Stephen E. Strelkov Sheau-Fang Hwang |
author_sort | Yixiao Wang |
collection | DOAJ |
description | Blackleg, caused by <i>Leptosphaeria maculans</i>, is an important disease of canola (<i>Brassica napus</i>). The pathogen can attack stems, leaves and pods, but basal stem cankers are most damaging and can result in significant yield losses. In Canada, Verticillium stripe (<i>Verticillium longisporum</i>) has recently emerged as another disease threat to canola. Symptoms of Verticillium stripe can resemble those of blackleg, and the two diseases may occur together. The effect of blackleg on yield was explored in field experiments with two canola hybrids and by evaluating a wider variety of hybrids in commercial crops in central Alberta, Canada. The impact on yield of <i>L. maculans</i>/<i>V. longisporum</i> interactions was also assessed under field and greenhouse conditions. In most hybrids, the relationship between blackleg severity and yield components was best explained by second-degree quadratic equations, although a linear relationship was found for one variety sampled in commercial fields. When <i>L. maculans</i> was co-inoculated with <i>V. longisporum</i>, blackleg severity and yield losses increased. In some cases, Verticillium stripe caused greater yield losses than blackleg. The results suggest that the interaction between <i>L. maculans</i>/<i>V. longisporum</i> may cause more severe losses in canola, highlighting the need for proactive disease management strategies. |
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spelling | doaj.art-d9e9688e69cd44a6972dad50ef6ab3292023-11-16T17:42:19ZengMDPI AGPlants2223-77472023-01-0112343410.3390/plants12030434Blackleg Yield Losses and Interactions with Verticillium Stripe in Canola (<i>Brassica napus</i>) in CanadaYixiao Wang0Stephen E. Strelkov1Sheau-Fang Hwang2Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5, CanadaDepartment of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5, CanadaDepartment of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5, CanadaBlackleg, caused by <i>Leptosphaeria maculans</i>, is an important disease of canola (<i>Brassica napus</i>). The pathogen can attack stems, leaves and pods, but basal stem cankers are most damaging and can result in significant yield losses. In Canada, Verticillium stripe (<i>Verticillium longisporum</i>) has recently emerged as another disease threat to canola. Symptoms of Verticillium stripe can resemble those of blackleg, and the two diseases may occur together. The effect of blackleg on yield was explored in field experiments with two canola hybrids and by evaluating a wider variety of hybrids in commercial crops in central Alberta, Canada. The impact on yield of <i>L. maculans</i>/<i>V. longisporum</i> interactions was also assessed under field and greenhouse conditions. In most hybrids, the relationship between blackleg severity and yield components was best explained by second-degree quadratic equations, although a linear relationship was found for one variety sampled in commercial fields. When <i>L. maculans</i> was co-inoculated with <i>V. longisporum</i>, blackleg severity and yield losses increased. In some cases, Verticillium stripe caused greater yield losses than blackleg. The results suggest that the interaction between <i>L. maculans</i>/<i>V. longisporum</i> may cause more severe losses in canola, highlighting the need for proactive disease management strategies.https://www.mdpi.com/2223-7747/12/3/434blackleg<i>Brassica napus</i>canolainteractionsVerticillium stripeyield losses |
spellingShingle | Yixiao Wang Stephen E. Strelkov Sheau-Fang Hwang Blackleg Yield Losses and Interactions with Verticillium Stripe in Canola (<i>Brassica napus</i>) in Canada Plants blackleg <i>Brassica napus</i> canola interactions Verticillium stripe yield losses |
title | Blackleg Yield Losses and Interactions with Verticillium Stripe in Canola (<i>Brassica napus</i>) in Canada |
title_full | Blackleg Yield Losses and Interactions with Verticillium Stripe in Canola (<i>Brassica napus</i>) in Canada |
title_fullStr | Blackleg Yield Losses and Interactions with Verticillium Stripe in Canola (<i>Brassica napus</i>) in Canada |
title_full_unstemmed | Blackleg Yield Losses and Interactions with Verticillium Stripe in Canola (<i>Brassica napus</i>) in Canada |
title_short | Blackleg Yield Losses and Interactions with Verticillium Stripe in Canola (<i>Brassica napus</i>) in Canada |
title_sort | blackleg yield losses and interactions with verticillium stripe in canola i brassica napus i in canada |
topic | blackleg <i>Brassica napus</i> canola interactions Verticillium stripe yield losses |
url | https://www.mdpi.com/2223-7747/12/3/434 |
work_keys_str_mv | AT yixiaowang blacklegyieldlossesandinteractionswithverticilliumstripeincanolaibrassicanapusiincanada AT stephenestrelkov blacklegyieldlossesandinteractionswithverticilliumstripeincanolaibrassicanapusiincanada AT sheaufanghwang blacklegyieldlossesandinteractionswithverticilliumstripeincanolaibrassicanapusiincanada |