| What disease is predominantly seedborne in OSR | Alternaria |
| 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 active can be used on clearfield rape to control volunteer rape and charlock/runch | Imazamox |
| What is the target GAI at flowering? | 3.5 |
| How long can Clubroot inoculum remain viable in the soil for? | 20 years |
| 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 |
| Where can Sclerotinia inoculum be found? | Soil |
| What are the favoured conditions for Sclerotinia? | 7 degrees and humid |
| What other combinable crop within the rotation will increase risk of Sclerotinia? | Peas |
| 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 insecticide can be used to control pollen beetle, now resistant to pyrethroids? | Indoxacarb |
| 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 spraying pollen beetle when the OSR crop is 30 - 50 plants/m2? | 18/plant |
| What is the threshold for spraying pollen beetle when the OSR crop is 50 - 70 plants/m2? | 11/plant |
| What is the threshold for Phoma in a high resistance to stem canker variety? | 20% |
| What is the threshold for Phoma in a low resistance to stem canker variety? | 10% |
| What is the threshold for Light Leaf Spot? | Spray at first sight |
| What is the threshold for CSFB adults at 1-2 true leaf stage? | 25% |
| What is the threshold for CSFB adults at 2-4 true leaf stage? | 50% |
| What variety has genetic resistance to Turnip Yellows Virus? | Architect |
| Where can downy mildew inoculum be found? | Hosts, seed and trash |
| What are high risk conditions for verticillium stem wilt? | Warm and dry |
| What are cultural controls for verticillium stem wilt? | Long rotation, min-till, delay drilling |
| What TGW reduction can be expected through verticillium stem wilt? | 25% |
| How long can phoma and stem canker persist on crop debris? | 1-2 years |
| What is the likely loss from bad phoma infections? | 10-20% |
| What region is worst affected by phoma? | SE |
| 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 |
| Name a herbicide with an EAMU in OSR for charlock control | Bifenox |
| Contans WG is a biological control for what OSR disease? | Sclerotinia |
| An insecticide product that would give effective control of pollen beetles which exhibit Kdr would be: | Indoxacarb |
| The main vector of TuYV is? | Peach potato aphid |
| An OSR disease which is commonly seed and soil borne is? | Alternaria |
| What is the maximum seed moisture content for desiccating OSR? | 30% |
| What fungicides could be applied to control Phoma in OSR? | Prothioconazole and Difenconazole |
| A large black grub with a distinct head capsule, three pairs of chest legs and pro-legs is found eating OSR foliage in a warm autumn. It is a? | Turnip sawfly |
| What moisture % should OSR be stored at? | <9% |
| 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 yield loss that can be caused by TUYV? | 26% |
| 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 variety has high resistance against phoma and clubroot? | Croozer |
| 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 |
| How severe can sclerotinia yield loss be? | 50% |
| What are the management controls for clubroot? | Soil testing, manage brassica volunteers and weeds, long rotation, improve drainage |
| What is the threshold for spraying pollen beetle when the OSR crop is >70 plants/m2? | 7/plant |
