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Title:   Author  item
                                            SU, HAI - UNIV OF CALIF, DAVISitem
                                            BHAT, RAVI - UNIV OF CALIF, DAVISitem
                                            GUBLER, WALTER - UNIV OF CALIF, DAVISitem
                                            Browne, Greg
  Submitted to: Joint Meeting of the American Phytopathological Society and Society of Nematology
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 8/1/2007
                                    Publication  Date: N/A
                                    Citation: N/AInterpretive Summary:
                                Technical Abstract: Nylon bags containing strawberry plant tissues infected by Colletotrichum acutatum or V8 juice-oat seed-vermiculite (V8JOV) substrate colonized by Phytophthora cactorum were buried at depths of 0, 10, 20, 30, and 40 cm in Yolo Fine Sandy Loam soil, which was non-solarized or solarized using a 6-mm plastic film. Bags were recovered after 51 (July 2 to Aug. 22, 2005) and 62 (July 23 to Sept. 23, 2006) days. Buried plant tissues and V8JOV substrate were plated on agar media to evaluate the survival of the pathogens. There was a significant difference in survival rates between solarized and non-solarized soils for both pathogens in both years. Neither pathogen survived at 0 to 40 cm depths in solarized soil. In contrast, both pathogens survived at all soil depths in the non-solarized soil, but there was a general decline in survival rate. During the burial period, accumulated hours above 35, 40, and 45°C at all depths were 445 to 853, 0 to 289, and 0 to 289 h, respectively, in 2005, and 301 to 334, 123 to 153, and 5 to 17 h, respectively, in 2006. Preliminary tests on thermal sensitivity of these two pathogens indicated that C. acutatum survived up to 14 days at 35°C and 2 days at 40°C, while P. cactorum survived ca. 2 days at 35°C and 4 h at 40°C. Solarization is a potential soil sanitation practice for strawberry nurseries, organic or conventional fruit production.


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