Incidence and distribution of "Candidatus Phytoplasma prunorum' and its vector Cacopsylla pruni in Spain: an approach to the epidemiology of the disease and the role of wild Prunus

被引:7
|
作者
Sabate, J. [1 ]
Lavina, A. [1 ]
Batlle, A. [1 ]
机构
[1] IRTA, Ctra Cabrils Km 2, Barcelona 08348, Spain
关键词
European stone fruit yellows; Phytoplasma prunorum; Prunus; vector; STONE-FRUIT-YELLOWS; PEAR DECLINE; APPLE PROLIFERATION; ESFY PHYTOPLASMAS; CATALONIA SPAIN; CAUSAL AGENT; TRANSMISSION; FRANCE; SUSCEPTIBILITY; AMPLIFICATION;
D O I
10.1111/ppa.12464
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Candidatus Phytoplasma prunorum' is the causal agent of the European stone fruit yellows (ESFY) disease. This phytoplasma affects wild and cultivated species of Prunus to different degrees, depending on their susceptibility. Candidatus Phytoplasma prunorum' is present in the four regions of Spain surveyed in this study (Aragon, Catalonia, Extremadura and Valencia) with a variable incidence. Results showed that Ca. Phytoplasma prunorum' was detected in all of the cultivated Prunus species studied, except P.avium and P.dulcis, and was widespread in Spain. The most affected species was P.salicina, with symptoms including early bud break and blooming, leaf curling and yellowing, collapse, and a major decrease in production. In some plots in the Baix Llobregat area of Barcelona province (Catalonia), the incidence of ESFY on P.salicina was as high as 80%. The insect vector, Cacopsylla pruni, was present in all four of the regions studied, with the highest captures in yellow sticky traps in Catalonia on P.mahaleb and in Extremadura in peach orchards. In Baix Llobregat, large populations of C.pruni were present on infected P.mahaleb bushes, and with high infection rates. This was a key factor in the local pathogenic cycle that caused a major ESFY outbreak in the nearby P.salicina orchards. In the Ebro valley (Lleida and Aragon) and Valencia, the surveys showed very low incidences of the disease and low C.pruni populations.
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页码:837 / 846
页数:10
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