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HIGH INFECTION PRESSURE OF ESFY PHYTOPLASMA THREATENS THE CULTIVATION OF STONE FRUIT SPECIES
Barbara AMBROŽIČ TURK
; Agricultural Institute of Slovenia, Fruit and Wine growing Department, Hacquetova 17, SI - 1000 Ljubljana, Slovenia
Nataša MEHLE
; National Institute of biology, Večna pot 111, SI - 1000 Ljubljana, Slovenia
Jernej BRZIN
; National Institute of biology, Večna pot 111, SI - 1000 Ljubljana, Slovenia
Vojko ŠKERLAVAJ
; Agricultural Institute of Slovenia, Fruit and Wine growing Department, Hacquetova 17, SI - 1000 Ljubljana, Slovenia
Gabrijel SELJAK
; Agriculture and Forestry Service Nova Gorica, Pri Hrastu 18, SI - 5000 Nova Gorica, Slovenia
Maja RAVNIKAR
; National Institute of biology, Večna pot 111, SI - 1000 Ljubljana, Slovenia
Sažetak
Stone fruit species are affected by severe disease caused by European stone fruit yellows phytoplasma (ESFY; ‘Candidatus Phytoplasma prunorum’). ESFY phytoplasma is transmitted to the host plants of Prunus spp. by the vector Cacopsylla pruni. The disease is graft-transmissible as well. The occurence of ESFY phytoplasma was monitored from 2004 to 2006 in a mother plant orchard of stone fruit species planted with virus free material in 2001 in the Primorska region of Slovenia. The total of 158 samples of mother plants were analysed in this period. The symptomatic
and asymptomatic trees were analysed using molecular methods (PCR or nested-PCR). Among 15.7 % of sampled apricot trees (Prunus armeniaca) in the orchard, ESFY phytoplasma was detected in 70.0 % of samples. In the case of Japanese plum (Prunus salicina) samples were taken from one third of all Japanese plum trees and the presence of ESFY phytoplasma was confi rmed in all samples. In the European plum trees (Prunus domestica) the incidence
of phytoplasma was determined in 51.0 % of sampled trees, where the plants in most cases did not show symptoms. ESFY phytoplasma was also detected in peaches and nectarines (Prunus persica) in 13.0 % of sampled trees while no detection of the phytoplasma was confi rmed in the samples of cherry trees (Prunus avium). With the survey performed in a mother plant orchard it was observed that especially young trees did not show typical symptoms and the infection
was latent. In the year 2005, ESFY phytoplasma was detected in all tested samples of the vector Cacopsylla pruni captured in the vicinity of the mother plant orchard.
Ključne riječi
stone fruit species; disease control; phytoplasma; ESFY; diagnosis; Slovenia
Hrčak ID:
38118
URI
Datum izdavanja:
16.3.2009.
Posjeta: 1.258 *