| Abstract Detail
Plant Protection Sangchote, Somsiri [1]. Diseases associated with seed potato importation and tuber production in Thailand. THAILAND currently produces 8 – 10,000 ha of potatoes, mostly for chip and fresh market utilization. The majority of seed tubers for planting are imported from Australia, Scotland, the Netherlands and the USA. Atlantic is the main cultivar grown for chips, but Spunta is used for fresh market production. Three quarantine issues on imported potato seed tubers including powdery scab, viruses, and excessive soil have led to import rejection and destruction of some seed lots. Healthy seed lots were released for planting and further field inspections were also conducted. The main disease in production fields is late blight (Phytophthora infestans). Symptoms may be observed soon after emergence in years with frequent early season rainfall. Intensive fungicide spray programs are used for late blight control mostly using combinations of mancozeb and mefenoxam although newer chemistries such as cymoxanil + famoxadone and dimethomorph are also beginning to be used by growers. Resistance to metalaxyl and mefenoxam fungicides appears to be widely distributed. PVY was less important than late blight, but in some areas, severe infection reduces yield. Other observed diseases include early blight, brown rot and root knot nematodes.
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1 - Kasetsart University, Department of Plant Pathology, 50 Jatuchuk, Bangkok, 10900, Thailand
Keywords:
Diseases
seed potato.
Session: PAA03-1
Location: Hall of Ideas Room E/Monona Terrace
Date: Thursday, July 27th, 2006
Time: 8:30 AM
Abstract ID:71 |
