Results of 2002 surveys on quarantine pests in Latvia
During 2002, several surveys for different plant quarantine pests were carried out in Latvia (for 2001 results see EPPO RS 2002/075).
Bursaphelenchus xylophilus (EPPO A1 list)
71 samples of Pinus were collected from forest trees and sawn timber. B. xylophilus was not found. Absent, confirmed by survey.
Beet necrotic yellow vein benyvirus (rhizomania - EPPO A2 list)
51 samples were collected from 35 beet production farms from a total area of 569.9 ha. The virus was not found. Absent, confirmed by survey.
Clavibacter michiganensis subsp. sepedonicus and Ralstonia solanacearum (both EPPO A2 list)
59 seed-potato production farms were inspected and 189 samples were taken for detection of potato ring rot and brown rot. Infection of C. michiganensis subsp. sepedonicus was found in 6 farms with infected fields (total area of 36.45 ha). Control measures are being taken in accordance with EU Council Directive 93/85. In 2003, the Ministry of Agriculture also allocated financial compensations to infested farms in order to reduce their losses due to the application of compulsory phytosanitary measures. R. solanacearum was not found.
C. michiganensis subsp. sepedonicus: Present, found at 6 production sites, under official control.
R. solanacearum: Absent, confirmed by survey.
Erwinia amylovora (EPPO A2 list)
In order to verify the absence of E. amylovora in Latvia, 78 sites with fireblight host plants (Chaenomeles, Cotoneaster, Crataegus, Malus, Pyrus, Sorbus) over a total area of 552.5 ha were inspected and 93 samples were taken and tested for the presence of the bacterium. E. amylovora was not found. Absent, confirmed by survey.
During surveys on glasshouse pests, 132 samples were collected from 120 production sites.
- Bemisia tabaci (EPPO A2 list) was not found. Absent, confirmed by survey.
- Liriomyza bryoniae (EU Annexes) was confirmed in 16 glasshouses (total infested area of 20,840 m²), on the following crops: capsicum, cucumber and tomato. Present, only in glasshouses.
- Thrips palmi (EPPO A1 list) was not found. Absent, confirmed by survey.
Globodera rostochiensis and G. pallida (both EPPO A2 list)
7614 soil samples were collected from 85 seed-potato production farms and 194 nurseries and tested. Inspections were also carried out on these sites. The presence of G. rostochiensis was confirmed in 231 samples corresponding to 10 seed-potato production farms (infested area of 31.6 ha) and 7 nurseries (4.07 ha). Eradication measures are being taken in the infested areas. G. pallida was not found. G. rostochiensis: Present, found in several production sites (10 seed-potato production sites and 7 nurseries), under eradication.
G. pallida: Absent, confirmed by survey.
235 samples (pheromone traps) were collected from orchards and nurseries. G. molesta was found in 2 samples. Present, found in 2 samples.
Puccinia horiana (EPPO A2 list)
48 samples of chrysanthemums were taken from 37 cut-flower production sites and from 26 planting-material production sites. P. horiana was found in 9 cut-flower production sites with a total infected area of 4,470 m². Present, found in 9 production sites of chrysanthemum cut flowers.
NPPO of Latvia, 2003-09.