New Zealand Journal of Crop and Horticultural Science abstracts
Virus disease surveys of ware potato crops, Franklin County,
North Island, New Zealand
J. D. FLETCHER1
S. L. LEWTHWAITE2
H. J. BODDINGTON1
H. M. NOTT1
R .J. WOOD3
1New Zealand Institute for Crop & Food
Research Limited
Private Bag 4704
Christchurch, New Zealand
2New Zealand Institute for Crop & Food
Research Limited
Cronin Road
RD1 Pukekohe, New Zealand
3Eden Rd
RD 1 Pukekohe, New Zealand
Abstract Surveys for virus disease in potato (Solanum
tuberosum L.) ware crops were completed over three successive seasons.
Overall mean incidence of viruses in plants derived from pathogen-tested
(PTreg.) seed lines and non-PT seed lines was 2.2 and 7.6% (1991), 4.1 and
11.2% (1992), and 2.5 and 6.5% (1993) respectively. The levels of potato
leaf-roll virus and severe mosaics were particularly low in crops grown from
PTreg. seed. Virus incidence was generally low apart from individual crops with
high potato virus X, potato virus S (PVS), or potato virus Y (PVY) levels
(these crops were often from saved seed tubers). The incidence of
PVYN appears to have been contained through the use of PTreg. seed,
but the identification of PVSA and the rediscovery of potato virus A
and potato virus M are of some concern. Suggestions for improvements to seed
quality control are discussed.
Keywords virus survey; potato; Solanum tuberosum;
viruses; New Zealand; pathogen tested
New Zealand Journal of Crop and Horticultural Science, 1996, Vol. 24:
7-12
0114-0671/96/2401-0007 $2.50/0 (c) The Royal Society of New Zealand
1996
PDF file of entire paper: medium quality (450K); (scanned from paper original: notes about this process)
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