New Zealand Journal of Crop and Horticultural Science abstracts
Short communication
Pathogenicity of 11 Phytophthora species on CAB-6P cherry rootstock
T. Thomidis
T. Sotiropoulos
Pomology Institute
Naoussa, P. C. 59200
Greece
email: thomi-1@otenet.gr
Abstract The pathogenicity and virulence of 11 Phytophthora
spp. isolated from various hosts were evaluated on CAB-6P cherry rootstock.
Isolates of P. cactorum, P. cryptogea, P. citrophthora,
P. citricola, and isolate 1143 of P. nicotianae were pathogenic
by all three test methods. An in vivo test using bark strips did not
distinguish between the isolates in relative virulence and an excised twig
test showed P. cactorum and P. cryptogea to be more virulent
than the other species. Trunk inoculation ranked the pathogenic species in
the order given above. P. capsici, P. cambivora, P. boehmeriae,
P. drechsleri, P. palmivora, P. erythroseptica, and
isolate 1258 of P. nicotianae were not pathogenic on CAB-6P cherry
rootstock. The identity and variability of Phytophthora spp. is important
when considering strategies for applying an integrated program to control
crown rot of cherry trees.
Keywords crown rot; host specificity; isolates; Prunus
cerasus
H03043 Received 30 April 2003; accepted 1 August 2003; Online publication
date 3 November 2003
New Zealand Journal of Crop and Horticultural Science, 2003, Vol. 31:
355-360
0014-0671/03/3104-0355 $7.00 © The Royal Society of New Zealand
2003
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