Flashcards
Fusarium Flash Cards
Cards in this deck (38)
- 1ZON legal levels for foodUnprocessed wheat 100ppb
flour 75ppb
products 50ppb
infant food 20ppb - 2inoculum for seedling blight and foot rotseed born and soil born
- 3inoculum for FEBcrop residues, weeds, volunteers, resting spores
- 4how does it reach earrain splash
- 5conditions for FEBGS59-65, wet weather, 15 degrees M. Nivale, >25 degrees for other species
- 6two types of mycotoxins for FEBTrichothecenes
Zearalenone - 7what mycotoxin is responsible for ZONzearalenone
- 8what two types of trichothecens are thereType A T-2 and HT+2
Type B Deoxynivalenol - 9what is DONType B Trichothecens= Deoxynivalenol
- 10DON legal levels for foodUnprocessed wheat 1250ppb
flour 750ppb
products 500ppb
infant food 200ppb - 11brown foot rot effectssoil and seed born, dry conditions, traditionally hotter climates than the UK, yield loss is not clear
- 12what is being introduced in 2015legal limits for type A in oats thought to be unproccessed oats 100ppb, could cut UK oat production by 16%
- 13effects of Zonhumans cancer
animals reproductive disorders - 14effects of DONhumans, sickness, kidney function damage, nervous systom damage
animals feeding disorders via rejection of food - 15fusarium incidence high in 2007 and 2012 why?wet
- 16DON produced in what phaseMilk phase
- 17ZON produced inripening phase
- 18what became mandatory in 2007risk assessments carried out with HGCA to put on grain passports
- 19mycotoxin control"azole" sprays eg prothiocanazole (T3), resistant cultivars, ploughing
- 20difference in emergence comparing wheat which emerged at 14 days compared to 28 days50% reduction as time to emerge increased
- 21describe the growth and sporulation of F.grow vegatively via mycelium and sporulate asexually via sporodochia
- 22how are F. species diagnoseddiagnosis via visual assessment of the conidia (asexual spores) cresent shapes 2 types microconidia and macroconidia
- 23describe microconidia0-1, tapered at one end, fusoid to oval in shape
- 24describe macroconidia0-10+, tapered at end, straight or curved
- 25what does septate meantapered at one end
- 26what colour are microdochium and what are they associated withred/pink or orange, seedling blight
- 27symptoms of seedling blightpatchy establishment, colouring of seed
- 28disease score 1 of seedling blight equal tolessions on coleoptile
- 29disease score 5 of seedling blight equal topre emergence death
- 30brown foot rot symptomsbrowning of the stem base, lodging
- 31seedling blight conditionscold, dry seedbeds have biggest reduction in emergence
- 32as emergence decreasesincidence increases
- 33how does early sowing help prevent seedling blight lossEaryl sowing leads to faster emergence which reduces seedling lbight as fungi has less time to take effect
- 34fusarium diseasesseedling blight
brown foot rot
ear blight - 35sexual stateAnamorphs (Asexual)
- 36fusarium species6 species effecting whole of plant, 4 Fusariums and 2 microdochiums
- 374 fusariumsF. avenaceum (ear)
F. culmorum (whole plant)
F. graminearum (ear)
F. poae (ear) - 382 michrodochiumsM. nivale (plant)
M. majus (plant)
both mostly seedling
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- Advanced Agronomy Flashcards on Fusarium Flash Cards, created by samtjdaw on 16/05/2013.
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- samtjdaw
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