New Zealand Journal of Crop and Horticultural Science abstracts

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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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