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http://dx.doi.org/10.7235/hort.2013.12230

Effects of Fungicides on Inhibition of in Vitro Strawberry Pollen Germination  

Nam, Myeong Hyeon (Nonsan Strawberry Experiment Station, Chungcheongnam-do Agricultural Research & Extension Services)
Kim, Hyun Sook (Nonsan Strawberry Experiment Station, Chungcheongnam-do Agricultural Research & Extension Services)
Choi, Je Hyun (Nonsan Strawberry Experiment Station, Chungcheongnam-do Agricultural Research & Extension Services)
Lee, He Duck (Nonsan Strawberry Experiment Station, Chungcheongnam-do Agricultural Research & Extension Services)
Publication Information
Horticultural Science & Technology / v.31, no.5, 2013 , pp. 633-639 More about this Journal
Abstract
Fungicide applications are required to prevent the strawberry from Botrytis fruit rot and powdery mildew that infect open strawberry flowers, however, their effects of fungicides on pollen germination of strawberry have been rarely documented, particularly those from recently developed active fungicidal ingredients. In this study we have evaluated the effects of 24 commercial fungicidal formulations and 6 organic materials on pollen germination in 3 strawberry cultivars using in vitro assays. Pollens from strawberry had higher germination rates on agar with sucrose of 18% and $25^{\circ}C$ than other tested conditions. Pollen germination rates of cvs. Seolhyang, Maehyang, and Kumhyang at 18% sucrose and $25^{\circ}C$ were 15.3, 18.4 and 30.7%, respectively. Pyraclostrobin, azoxystrobin, kresoxim-methyl, dichlofluanid, iminoctadine tris, and sulfur showed the strongest inhibitory efficacy with the germination rates of more than 93.8% compared to the no-fungicide control. Germination was not significantly affected by simeconazole and procymidone. This in vitro germination study may provide information useful for selecting fungicides in flowering stage to strawberry farmers.
Keywords
azoxystrobin; pyraclostrobin; Seolhyang;
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