Full TGIF Record # 226453
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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2010 Proceedings-SWSS.pdf#page=96
    Last checked: 07/31/2013
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Author(s):McElroy, J. S.; Rose, J. J.
Author Affiliation:Auburn University, Auburn, AL
Title:Identification and postemergence control of Brazilian catsear dandelion (Hypochoeris brasiliensis)
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Meeting Info.:Little Rock, Arkansas: January 25-27, 2010
Source:2010 Proceedings, Southern Weed Science Society. Vol. 63, 2010, p. 46.
# of Pages:1
Publishing Information:Champaign, Illinois: Southern Weed Science Society
Keywords:TIC Keywords: Herbicide evaluation; Hypochaeris chillensis; Hypochaeris glabra; Hypochaeris radicata; Postemergence weed control; Weed profile
Abstract/Contents:"Hypochoeris spp. (also spelled Hypochaeris) are plant species in the Asteraceae family that are similar to common dandelion (Taraxacum officinale). There are three main Hypochoeris species: H. glabra (smooth catsear dandelion), H. radicata (hairy catsear dandelion), and H. brasiliensis (brazilian catsear dandelion; also known as H. chillensis). Hypochoeris species have many similar characteristics. Hypochoeris are rosette forming with lanceolate, pinnatified leaves that are glabrous or pubescent depending on the species. Leaves of common dandelion are lanceolate, dentate with toothed margins pointing to rosette center. Hypochoeris spp. posess 2-7 dark/mustard yellow disk shaped flowers per flowering stalk, as opposed to single flowers at the end of hollow glabrous stalk for common dandelion. Involucral bracts of Hypochoeris spp. are red to brown on the underside. The feathery pappi are white to pale tan compared to the white pappi of common dandelion. Specifically, H. brasiliensis is native to South America; however, it has flourished in the Southeast U.S. and can be found from North Carolina to Texas. H. brasiliensis is in general a larger plant than H. glabra and H. radicata. H. brasiliensis leaves are generally glabrous with a prominent white mid-rib and sharply dentate margins. Currently, little information is available regarding control of H. brasiliensis. Research was conducted to evaluate postemergent herbicides for H. brasiliensis control at Auburn University in Auburn, AL. The experimental design was a randomized complete block (r=3) with 10 treatments including a non-treated control. Treatments included: 2,4-D amine (applied at 1.4 lb ae/a), dicamba (1.0 lb ae/a), Trimec^DREG Southern (1.15 lb ae/a; a combination product of MCPA, 2,4-D, and dicamba), Escalade 2 (1.5 lb ae/a; a combination product of fluroxypyr, 2,4-D, and dicamba), Celsius™ (0.2 lb ai/a; a combination product of thiencarbazone, iodosulfuron, and dicamba), trifloxysulfuron (0.03 lb ai/a), carfentrazone (0.03 lb ai/a), metsulfuron (0.02 lb ai/a), and fluroxypyr (0.47 lb ae/a). Visual ratings of percent control were recorded 1, 2, 5, and 7 weeks after treatment (WAT). Data was subjected to ANOVA (P = 0.05) and means were separated by Fisher's protected LSD (P = 0.05). Carfentrazone controlled H. brasiliensis greater than all other treatments (52%) 1 WAT; however, control dropped to 13% by 7 WAT, at which time H. brasiliensis had recovered enough to bolt and bloom. At all rating dates, trifloxysulfuron controlled H. brasiliensis <10%. Metsulfuron and fluroxypyr were slow to control H. brasiliensis; however, by 5 WAT control from these herbicides was 70 and 87% respectively. Dicamba, 2,4-D, Trimec Southern, Escalade 2, and fluroxypyr all controlled H. brasiliensis 100%, 7 WAT."
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
McElroy, J. S., and J. J. Rose. 2010. Identification and postemergence control of Brazilian catsear dandelion (Hypochoeris brasiliensis). South. Weed Sci. Soc. Proc. 63:p. 46.
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http://www.swss.ws/wp-content/uploads/docs/2010 Proceedings-SWSS.pdf#page=96
    Last checked: 07/31/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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