A virus which persists in the soil for long periods and results in high yield losses.
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Has the UK always had rhizomania?
Only since 2001 when it was first detected on british soils.
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what were the effects of a new strain of rhizomia being discovered in 2007?
More aggressive resulting in up to 70% yield loss and 20-30% suar content reduction. This strain was able to overcome single gene resistance.
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What variety of sugar beet has resistance to this new variety of Rhizomia?
Sandra KWS.
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How can you manage rhizomania?
Avoid soil movement (machinery management). Variety resistance. Wide rotations can help reduce the speed of initial build up - however little use when the disease is established. No known chemical control.
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2 types of nematodes that affect the sugar beet?
Beet cyst nematode, and free living nematode.
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what is an alternative host for BCN?
OSR
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How can we manage BCN?
Monitor, contain, use of wider rotations and variety resistance.
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What virus can free living nematodes spread?
docking disorder.
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How can be control free living nematode?
Monitor. Soil manaement. machinery management. Large rotations. No variatal resistance. Nematicides can be used.
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How do we apply nitrogen to a beet crop?
Apply early and avoid excessive amounts.
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WHat can too much nitrogen lead to in sugar beet?
A reduction in sugar yield. The nitrogen can replace the sugar content in the root.
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when are the two splits of nitrogen applied?
1st application into the seedbed prior to drilling and the second post emergence during seedling stage.
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How should the seedbed be when sugar beet is drilled?
Stale - non selective systemic herbicide, glyphosate.
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Are pre em herbicides a good idea?
yes - provide a selective barrier to emerging weeds.
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What is the FAR system of spraying herbicide onto a sugar beet crop?
Far system is a system which utilises a multiple application low dosage rate herbicide involving 3 active ingredients to control weeds until canpoy closure.
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How can this FAR system of herbicide be applied?
Using an inter row spraying system.
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What variety of sugar beet is resistant to bolting?
Haydn.
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4 factors that can control bolters?
Dont drill too early. Variety. hand roguing. Weed wiping.
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Why are aphids a problem?
they are vectors to virus'.
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What virus can aphids spread?
Virus yellows.
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What two types of aphid can infect sugar beet?
peach potatoe aphid, and potato aphid.
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How can we reduce the incidence of aphid virus yellow infection?
Neonicitinoid seed treatment lasting for 10-14 weeks post em.
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4 Foliar diseases of sugar beet?
Rust, mildew, ramularia, cercospora.
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When should fungicides be applied to sugar beet?
From canopy closure - early july to late august.
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What should you consider when applying fungicides?
The harvest interval. especially if you plan on lifting beet early.
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What is a common number of T timings for sugar beet?
2
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What are 4 root quality factors?
High sugar content. low impurities. (Amino A) low dirt tare. Optimum crown height.
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What is the average yield of sugar beet?
60-70 T/ha. large yield increases in recent years.
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What are 4 factors of a typical beet clamp design?
Fleece - pulled over when cold. concrete floor. wooden panels for ventilation. straw bales.
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What is a maximum height for sugar beet to be stored at?
2.5 meters high.
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Why should long storage periods be avoided?
to prevent sugar loss.
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What is a typical sugar content of beet at harvesting?
16-18% sugar content.
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Other cards in this set
Card 2
Front
Has the UK always had rhizomania?
Back
Only since 2001 when it was first detected on british soils.
Card 3
Front
what were the effects of a new strain of rhizomia being discovered in 2007?
Back
Card 4
Front
What variety of sugar beet has resistance to this new variety of Rhizomia?
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