New Zealand Journal of Crop and Horticultural Science abstracts
Yields of low-virus and commercial narcissus bulbs at southern South Island
sites, New Zealand
R. B. ALLEN
P. D. McINTOSH
Manaaki Whenua--Landcare Research
Private Bag 1930
Dunedin, New Zealand
Abstract Trials were carried out to assess the production of
low-virus and standard commercial bulbs of four narcissus varieties in southern
New Zealand. In the first year, while attaining maturity, low-virus bulbs
showed field weight gains 83-126% greater than commercial bulbs. Low-virus
bulbs produced 32-87 offsets/100 bulbs, compared with 0-1/100 for commercial
bulbs. In the second year, low-virus bulbs showed similar field weight gains to
commercial bulbs, but produced 45-386% more offsets. It is concluded that
low-virus bulbs provide superior yields to commercial bulbs grown under similar
conditions in southern New Zealand, and that this superiority can be maintained
for at least 2 years with the same stock. Under experimental conditions the
yield of commercial varieties grown in the southern South Island considerably
exceeds that reported for the same varieties grown under commercial conditions
in Europe.
Keywords narcissus; bulbs; virus; productivity; New Zealand
PDF file of entire paper: medium quality (305K); (scanned from paper original: notes about this process)
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