Full TGIF Record # 225556
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Web URL(s):http://www.wsweedscience.org//wp-content/uploads/proceedings-archive/1982.pdf#page=113
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Publication Type:
Author(s):Thompson, L. G.
Author Affiliation:Plant Science Research Representative, Lilly Research Laboratories, Fresno, CA
Title:Growth regulator effects of EL-500 on established turfgrass species in California
Section:Research section II (agronomic crops)
Other records with the "Research section II (agronomic crops)" Section
Meeting Info.:Denver, Colorado: March 9-11, 1982
Source:1982 Proceedings of the Western Society of Weed Science. Vol. 35, 1982, p. 113-117.
# of Pages:5
Publishing Information:Newark, California: Western Society of Weed Science
Keywords:TIC Keywords: Bermudagrass control; Flurprimidol; Growth regulator evaluation; Medicago sativa; Seedhead inhibition
Trade Names:EL 500
Abstract/Contents:"EL-500 (formerly Compound 72500) {α-(l-methylethyl)-α-[4-(trifluoro-methoxy)phenyl]-5- pyramidinemethanol} is a new growth regulator for use on established turfgrass. Technical EL-500 is a non-volatile white crystalline solid with a melting point of 94° to 96°C. It is soluble in several organic solvents such as acetone, ethanol, methanol, dimethyl sulfoxide, and ethyl ether. EL-500 is currently formulated as a 1% granule and a 50% wettable powder. Preliminary toxicological data indicate that EL-500 has a low order of mammalian toxicity. For example, the oral LD0 is >500 mg/Kg for rats and the dermal LD50 is >2000 mg/Kg for rabbits. Eli Lilly and Company field and greenhouse studies have shown EL-500 to have growth regulator activity on most commercially grown cool- and warm-season turfgrass species. Weed species, broadleaves and grasses, present in test plots have also exhibited similar growth retardant responses. The physiological response to EL-500 is manifested in new shoots as an internodal reduction in the subapical region. EL-500 does not inhibit flowering in plants nor does it restrict root development. Since EL-500 is primarily absorbed by the roots, adequate rainfall or irrigation is necessary to move the compound into the root zone of the turfgrass. Field research was conducted in California to determine the activity of EL-500 on several major warm- and cool-season turfgrass species. Data on growth inhibition, seedhead suppression, and turf tolerance from experiments conducted during 1977-1981 will be discussed. The effect of varying spray volumes and repeat applications will also be addressed."
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Thompson, L. G. 1982. Growth regulator effects of EL-500 on established turfgrass species in California. Proc. West. Soc. Weed Sci. 35:p. 113-117.
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