Oilseed Rape
🇬🇧
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Oilseed Rape - Marcador
Oilseed Rape - Detalles
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Preguntas:
61 preguntas
🇬🇧 | 🇬🇧 |
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 |