Bacterial leaf scorch. Photo provided by: Edward L. Barnard, Florida Department of Agriculture and Consumer Services, Bugwood.org
Yellow oxalis. Photo provided by: Ted Bodner, Southern Weed Science Society, Bugwood.org
Juniper scale adults. Photo by: United States National Collection of Scale Insects Photographs Archive, USDA Agricultural Research Service, Bugwood.org.
Dogwood sawflies feeding. Photo provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware
Tag Archives: oxalis
Weed Hotline Issue 26
Mesotrione effect on crabgrass and nutsedge.
Mesotrione effect on plantain and Oxalis.
Control of crabgrass with mesotrione in turf.All photos from the presentation “Mesotrione for Weed Control in Warm- and Cool-Season Turf” by Travis W. Gannon, Fred H Yelverton, and Leon S. Warren, North Carolina State University, Department of Crop Science. To view the full presentation go to http://www.turffiles.ncsu.edu/extension/presentations/2006/Mesotrione_WeedControl.pdf
Weed Hotline Issue 19
White clover, an indicator of low mowing height and low fertility soil.
Spurge, an indicator of compacted soil.
Prostrate knotweed, an indicator of compaction.
Red Sorrel, an indicator of low pH, low fertility soil or dry soil.
Plantain, an indicator of low fertility soil.
Nutsedge and Oxalis (woodsorrel), indicators of wet soil.
Nimblewill, an indicator of excess shade.
Goosegrass, an indicator of compacted soil.
Crabgrass, an indicator of low mower height, wet soils, or high fertility. 
Carpetweed, an indicator of dry soil.
Black Medic, an indicator of dry soil. 
Bermudagrass (wiregrass), an indicator of low mowing height, compaction, or high fertility.
All Weed Pictures by Gordon Johnson, Extension Agent, Agriculture and Commercial Horticulture, University of Delaware, Kent County