Oilseed Rape
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Oilseed Rape - Details
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61 questions
| 🇬🇧 | 🇬🇧 |
| What is the final date of application of Kerb? | 31st January |
| What are the optimum conditions for Clubroot spread? | 16-18 degrees, wet poorly drained acidic soils |
| What are the optimum conditions for light leaf spot sporulation and spread? | 8 degrees and above with free water for 12 hours |
| What is the strongest fungicide for LLS? | Prothioconazole |
| What are the favored conditions for Phoma development | Late drilled, mild and wet weather |
| The sclerotia produced by Sclerotinia stem rot in oilseed rape may remain viable in the soil for | 7-10 years |
| What are the favoured conditions for Sclerotinia? | 7 degrees and humid |
| What would be a good fungicide to use as a flowering spray against Sclerotinia? | Prothioconazole and Boscalid |
| When might you apply a further fungicide for Sclerotinia? | 3 weeks after the first application, if the crop is still flowering |
| What is the main vector for TUYV in OSR and when is it likely seen? | Peach potato aphid in the autumn |
| What insecticide could be used against MACE and Kdr resistant Peach potato aphids in the autumn? | Flonicamid |
| What is the threshold for spraying pollen beetle when the OSR crop is less than 30 plants/m2? | 25/plant |
| What is the threshold for Light Leaf Spot? | Spray at first sight |
| Where can downy mildew inoculum be found? | Hosts, seed and trash |
| What are cultural controls for verticillium stem wilt? | Long rotation, min-till, delay drilling |
| What are high risk conditions for phoma? | Late drilled, mild and wet |
| A pest larvae found feeding in OSR stems in December has an orange-brown head. What is it? | Rape winter stem weevil |
| The main vector of TuYV is? | Peach potato aphid |
| What fungicides could be applied to control Phoma in OSR? | Prothioconazole and Difenconazole |
| A pest which is likely to be an economic problem in spring OSR over WOSR is? | Mealy cabbage aphid |
| Which herbicide can be used to control Shepherds purse in OSR? | Dimethanamid and Metazachlor |
| What does the Metazachlor & Quinmerac stewardship entail? | Individual and total applications are limited to 750g metazachlor and 250g quinmerac /ha |
| What are the symptoms of TUYV? | Chlorosis of leaves between veins and a red leaf edge |
| What is the main symptom of a bad pollen beetle infestation? | Blinding of stalks |
| What are high risk factors of Pollen beetle? | 15 degrees and above, prolonged green bud stage |
| How should one sample for pollen beetle? | Check 10 plants across 30m from headland inwards |
| What is the threshold for control of cabbage seed weevil? | 1/ plant in the South, 0.5/ plant in North |
| What is the threshold for controlling mealy cabbage aphid? | 13% of plants infested |
| What are the management controls for phoma? | Trash removal, early drilling, rotation |
| What is the management strategy for alternaria? | Trash removal, volunteer removal, rotation, certified seed and prothioconazole at flowering |
| What are the management controls for clubroot? | Soil testing, manage brassica volunteers and weeds, long rotation, improve drainage |