New Zealand Journal of Crop and Horticultural Science abstracts
Cultivar and crop management influences on fusarium head blight and mycotoxins
in spring wheat (Triticum aestivum) in New Zealand
M. G. Cromey
S. C. Shorter
New Zealand Institute for Crop & Food
Research Limited
Private Bag 4704
Christchurch, New Zealand
email: cromeym@crop.cri.nz
D. R. Lauren
The Horticulture and Food Research
Institute of New Zealand
Private Bag 3123
Hamilton, New Zealand
K. I. Sinclair
New Zealand Institute for Crop & Food
Research Limited
Private Bag 11 600
Palmerston North, New Zealand
Abstract Cultivar and crop management influences on
fusarium head blight (FHB) of wheat (Triticum aestivum L.) were investigated
in cultivar field trials and commercial wheat crops in the North Island of
New Zealand over two growing seasons. There were consistent differences between
cultivars in their susceptibility to FHB. The Chinese wheat ‘Nanjing’ had
the lowest level of FHB, mycotoxins, and Fusarium infection in grain.
Although no New Zealand cultivars approached an equivalent level of resistance,
FHB in some cultivars was low in most situations, and these cultivars had
a useful level of resistance. FHB and mycotoxin levels varied widely between
crops surveyed. Two Fusarium mycotoxins, deoxynivalenol (DON) and
nivalenol (NIV), were detected in grain samples from crops and trials. Overall,
DON levels were higher than NIV in crops in both years. FHB incidence and
levels of Fusarium infection and mycotoxins in grain were closely
related in samples from a particular crop, but the relationships were much
less apparent between crops. F. graminearum predominated in grain
samples, although F. avenaceum, F. culmorum, and F. poae
were also common. Highest levels of F. graminearum were recorded in
grain samples from crops that followed maize, whereas F. avenaceum
and F. poae were more common in samples from crops that did not follow
maize.
Keywords Fusarium graminearum; head scab; mycotoxins;
fungicides; host resistance
H02022 Received 7 March 2002; accepted 9 August 2002; published 9 December
2002
New Zealand Journal of Crop and Horticultural Science, 2002, Vol. 30:
235-247
0014-0671/02/3004-0235 $7.00 © The Royal Society of New Zealand
2002
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