Causes Phoma leaf spot and stem canker in oilseed rape are caused by two fungal species: Plenodomus lingam (leptosphaeria maculans) and P biglobosus (L biglobosa), which result in yield reductions ...

Discoloration and death of leaves on individual stems may point to Botryosphaeria canker at the base of the dying stem (Fig 2). As the canker girdles a stem, the portion of the stem above the canker ...

When 10–20% of plants show symptoms, the guidance is to treat varieties with lower resistance ratings for stem canker (7 and below) and small crops first. Lead crop protection scientist, Sacha White, ...

There are four key stem diseases in oilseed rape: phoma/stem canker, cylindrosporium (light leaf spot), verticillium wilt and sclerotinia.

OILSEED rape breeder Nickerson (UK) is advising farmers to delay drilling autumn rape until the end of the month or beginning of September as a precaution against stem canker. Trials had shown ...

Beck says crop rotation and planting resistant hybrids are the best ways to manage Phomopsis stem canker. "Crop rotation of two to four years is generally recommended," she says.

A canker, an area of disease in the wood of a plant, can look like a crack, peeling bark, a change of color of the stem, a sunken area or oozing sap. Since cankers can have such a wide range of ...

The Recommended Lists (2022/23) features several oilseed rape varieties with high levels of resistance to phoma stem canker (disease ratings 8 or 9). In low phoma-risk situations, it may be possible ...