Success of mowing to control yellow starthistle depends on timing and plant's branching form
AuthorsCarri B. Benefield
Joseph M. DiTomaso
Guy B. Kyser
Steve B. Orloff
Kenneth R. Churches
Daniel B. Marcum
Glenn A. Nader
Authors AffiliationsC.B. Benefield is Graduate Student, Department of Vegetable Crops, UC Davis; J.M. DiTomaso is Non-Crop Extension Weed Ecologist, Department of Vegetable Crops, UC Davis; G.B. Kyser is Staff Research Associate, Department of Vegetable Crops, UC Davis; S.B. Orloff, is Farm Advisors, Siskiyou, Calaveras, Shasta-Lassen, and Sutter-Yuba-Butte counties, respectively; K.R. Churches, is Farm Advisors, Siskiyou, Calaveras, Shasta-Lassen, and Sutter-Yuba-Butte counties, respectively; D.B. Marcum, is Farm Advisors, Siskiyou, Calaveras, Shasta-Lassen, and Sutter-Yuba-Butte counties, respectively; G.A. Nader is Farm Advisors, Siskiyou, Calaveras, Shasta-Lassen, and Sutter-Yuba-Butte counties, respectively.
Hilgardia 53(2):17-21. DOI:10.3733/ca.v053n02p17. March 1999.
Successful control of yellow starthistle by mowing depends on both proper timing and the plant's form of growth and branching. The branching habit of yellow starthistle is highly variable and is in part dependent on the level of competition with other species for light. Field studies were conducted in five Northern California counties to examine the effects of growth form, timing of mowing and number of mowings on yellow starthistle growth and seed production. Erect, high-branching populations were effectively controlled by a single mowing at early flowering, while sprawling, lowbranching plants were not satisfactorily controlled even by multiple mowings. Mowing should provide an effective tool for yellow starthistle control in an integrated approach with clopyralid treatment, prescribed burning or biological control.
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Also in this issue:Biological studies of iceplant scales, Pulvinariella Mesembryanthemi and Pulvinaria delottoi (Homoptera: Coccidae), in California
Expanded efforts needed to limit exotic pests
Introduction Special section: exotic pest update
AHB headed to Central Valley?
Fire ant invades Southern California
Medfly - going but not gone
Can integrated methods stop starthistle?
Two new seed head flies attack yellow starthistle
New growth regulator herbicide provides excellent control of yellow starthistle
A new sharpshooter threatens both crops and ornamentals
Glassy-winged sharpshooters expected to increase plant disease
Early results suggest sterile flies may protect S. California from medfly
Geographic races may exist among perennial grasses
Microsprinklers wet larger soil volume; boost almond yield, tree growth
Improving irrigation systems conserves water in greenhouse-grown cut flowers