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at pH conditions higher than pH 5.6, the normal pH of agar, potassium silicate enhanced this suppression in a linear manner. Suppression of Phytophthora cinnamomi , Phytophthora capsici , Sclerotinia sclerotiorum , Sclerotium rolfsii , Pythium F

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Conserv. Genet. 11 4 1499 1513 10.1094/PD-65-688 Quesada-Ocampo, L.M. Fulbright, D.W. Hausbeck, M.K. 2009 Susceptibility of fraser fir to Phytophthora capsici Plant Dis. 93 2 135 141 Shew, H.D. Benson, D.M. 1981 Fraser fir root rot induced by

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in South America Acta Hort. 715 165 172 Berhardt, E.A. Grogan, R.G. 1982 Effect of soil matric potential on the formation and indirect germination of sporangia of Phytophthora parasitica, P. capsici , and P

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844 Ristaino, J.B. Hord, M.J. Gumpertz, M.L. 1992 Population densities of Phytophthora capsici in field soils in relation to drip irrigation, rainfall, and disease incidence Plant Dis. 76 1017 1024

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-Mejía, 2000 ). Meloidogyne incognita is considered as the main root pathogen associated with pepper crops, and the main root fungal disease is Phytophthora capsici ( Gisbert et al., 2010 ). Furthermore, other pathogens such as Phytophthora nicotianae var

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four inbred lines, in the presence and absence of this disease. Wyatt et al. (p. 356) evaluated nine Phytophthora capsici -resistant inbred lines and hybrids derived from them for red harvest yield, ripe fruit characteristics, and phytophthora blight

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, 1999 ; Kuhajek et al., 2003 ); however, there are already metalaxy-resistant Phytophthora and Pythium spp. such as Pythium aphanidermatum ( Sanders et al., 1985 ), Phytophthora infestans , Phytophthora capsici , Phytophthora nicotianae , and

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resistance, tolerance, or no resistance to the crown-rot phase of Phytophthora capsici were evaluated in four different production systems for the development silvering in fruit. Variety, production system, and year each had a significant effect on

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such as Phytophthora capsici and Pythium spp., is a serious limiting factor for cucumber production in Michigan and other states ( Ando and Grumet, 2006 ; Hausbeck and Lamour, 2004 ). Screening of cucumber accessions has so far failed to identify

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Phytophthora capsici mycelial growth (C.S. Krasnow, unpublished data). Additional testing is necessary to determine the effect of pH on other fungicides and biological control agents labeled for pythium root rot control in greenhouses. Growing plants in

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