Deep plowing exacerbates lettuce drop in Salinas Valley
Krishna V. Subbarao, UCCE Monterey County
Steven T. Koike, UC Davis
Judith C. Hubbard, UC Davis
California Agriculture 50(5):30-33. DOI: 10.3733/ca.v050n05p30.
Deep plowing is unlikely to be a successful disease management strategy for lettuce drop in the high-inoculum-density fields of the Salinas Valley. Research shows that the deep-plowing procedure may change the distribution of soilborne sclerotia, ultimately resulting in higher disease incidence.
S.T. Koike is Plant Pathology Farm Advisor, UCCE Monterey County; K.V. Subbarao is Associate Plant Pathologist/CE Specialist, Department of Plant Pathology, UC Davis; J.C. Hubbard is Postgraduate Researcher, Department of Plant Pathology, UC Davis, located at the USD A Agricultural Research Station, Salinas;
This research was supported in part by the California Iceberg Lettuce Research Advisory Board. We gratefully acknowledge D'Arrigo Bros. for providing the field site for our data collection. We appreciate the assistance of A. Chassot, S. Dacuyan, T. Gonzales, J.J. Rao, R. Gutierrez, A. Lewis and E. Oakes.