New data on quarantine pests and pests of the EPPO Alert List
By browsing through the literature, the EPPO Secretariat has extracted the following new data concerning quarantine pests and pests included on the EPPO Alert List. The situation of the pest concerned is indicated in bold, using the terms of ISPM no. 8.
- New geographical records
Curtobacterium flaccumfaciens pv. flaccumfaciens (EPPO A2 list) is reported for the first time from Alberta and Saskatchewan, Canada (Huang et al., 2003). A survey carried out in 2001 revealed that the disease was widespread in the dry bean production regions of southern Alberta, and also occurred in Saskatchewan. There had been in the past a single record in 1954, but as C. flaccumfaciens pv. flaccumfaciens was no longer observed, it was considered as absent from Canada. Present, found in 2001 in Alberta and Saskatchewan.
- Detailed records
During a survey done in 2002 in Québec and Ontario (Canada), symptoms of Pantoea stewartii subsp. stewartii (EPPO A2 list) were observed at 42 locations in 10 counties of Ontario. The disease was not found in Québec (Zhu et al., 2003).
During a survey done in 2002 in Québec and Ontario (Canada), severe damage of Helicoverpa zea (Lepidoptera: Noctuidae - EPPO A1 list) was observed on several farms in Québec (Labelle county). The presence of the pest was also recorded in Ontario (Zhu et al., 2003).
Xanthomonas axonopodis pv. dieffenbachiae (EPPO A1 list) was first reported in Trinidad in 1990. It has caused significant losses to most of the commercial growers since its first discovery (Dilbar & Gosine, 2003).
Xanthomonas axonopodis pv. phaseoli (EPPO A2 list) occurs in bean crops in Manitoba, Canada (Yager & Conner, 2003).
- New host plants
The Southwestern dwarf mistletoe, Arceuthobium vaginatum subsp. cryptopodum (EPPO A1 list) is a serious and common pathogen of Pinus ponderosa in southern parts of USA and in northern Mexico. In July 2002, A. vaginatum subsp. cryptopodum was observed for the first time on the exotic European P. mugo. This tree was growing near infested P. ponderosa (Mathiasen et al., 2003).
In Hungary, Sambucus nigra (elderberry) is reported as a new host plant for Helicoverpa armigera (Lepidoptera: Noctuidae - EPPO A2 list). Serious damage was observed in a young plantation at Inárcs in August 2002 (Dömötör, 2003).
In Florida, Tomato spotted wilt tospovirus (EPPO A2 list) was found for the first time on outdoor-grown Hosta plants. Symptoms included leaf necrosis, stunting, chlorotic and necrotic spots and distinctive ring patterns (Momol et al., 2003).
Sources
Dilbar, A.; Gosine, S. (2003) Evaluation of susceptibility of anthurium hybrids to Pseudomonas blight (Acidovorax anthurii sp.) and anthurium bacterial blight (Xanthomonas campestris pv. dieffenbachiae). CARAPHIN News, no. 23, 4-6.
Dömötör, I. (2003) [A new pest of elderberry (Sambucus nigra L. 1753): the cotton bollworm (Helicoverpa armigera Hübner 1808). Növényvédelem, 39(8), 391-393.
Huang, H.C.; Hsieh, T.F.; Erickson, R.S. (2003) Distribution of new seed-borne diseases of dry bean in Alberta and Saskatchewan in 2001. Canadian Plant Disease Survey. 2003. Disease highlights. Canadian Phytopathological Society. Agriculture and Agri-Food Canada, 90-91.
Momol, M.T.; Dankers, H.; Adkins, S. (2003) First report of Tomato spotted wilt virus in Hosta in Florida. Plant Health Progress (on-line). http://www.plantmanagementnetwork.org/pub/php/brief/2003/hosta/
Mathiasen, R.; Haefeli, M.; Leatherman, D. (2003) First report of Arceuthobium vaginatum subsp. cryptopodum on Pinus mugo. Plant Disease, 87(11), p 1395.
Yager, L.; Conner, R.L. (2003) Diseases of field bean in Manitoba in 2002. Canadian Plant Disease Survey. 2003. Disease highlights. Canadian Phytopathological Society. Agriculture and Agri-Food Canada, 92-93.
Zhu, X.; Reid, L.M.; Woldemariam, T.; Tenuta, A.; Jay, S.; Lachance, P. (2003) Survey of corn diseases and pests in Ontario and Québec in 2002. Canadian Plant Disease Survey. 2003. Disease highlights. Canadian Phytopathological Society. Agriculture and Agri-Food Canada, 81-84.