Detail of "2464-37-1"

Reference

Chemical retardation of bermudagrass turf

Chemical retardation of bermudagrass turf. Wu, Chu-Huang; Myers, H. R.; Santelmann, P. W. (Agron. Dep., Oklahoma State Univ., Stillwater, Okla., USA). Agron. J., 68(6), 949-52 (English) 1976. CODEN: AGJOAT. DOCUMENT TYPE: Journal CA Section: 5 (Agrochemicals) Expts. were conducted to evaluate chem. growth regulators for their potential in retarding the growth of common and "Sunturf" bermudagrass (Cynodon dactylon). Maleic hydrazide (I) [123-33-1] and chlorflurenol (II) [2464-37-1] injured both types when applied at 4.5 or 3.4 kg/ha in the greenhouse. Ethephon [16672-87-0] stimulated stem elongation of both bermudagrasses when applied at rates 6. 123-33-1 and 16672-87-0 are cas registry numbers of chemicals which are used as reagents here.7 kg/ha in the greenhouse, while higher concn. retarded their growth in the field. Greenhouse plants grown under a wet regime (watered daily) showed no significant difference in chem. retardant effects on plant top growth and internode length from those grown under a dry (watered every 3 days) regime. Although more plant growth did occur in wet regimes, the growth retardation effect by the chems. was not nullified by such conditions. Common bermudagrass was less susceptible to injury than Sunturf in the greenhouse, and no significant retardation of Sunturf top growth was obtained in the field. Fluoridamid [47000-92-0], MBR 12325 (III) [53780-34-0] I, II, and ethephon were effective in reducing bermudagrass vegetative growth and seedhead development in the field. Single high rates of these compns. frequently caused bermudagrass injury, while split applications or chem. combinations at low rates provided excellent growth retardation with no undesirable turf appearance. .

Growth regulation of Kentucky bluegrass with several growth retardants

Growth regulation of Kentucky bluegrass with several growth retardants. Watschke, T. L. (Pennsylvania State Univ., University Park, Pa., USA). Agron. J., 68(5), 787-91 (English) 1976. CODEN: AGJOAT. DOCUMENT TYPE: Journal CA Section: 5 (Agrochemicals) Six growth regulators were applied to an 8-year-old stand of 'Pennstar' and 'Fylking' Kentucky bluegrass (Poa pratensis ) to evaluate turf growth suppression, phytotoxicity, total, nonstructural carbohydrates (TNC), and recovery from retardation stress to detn. the usefullness of retardants in turf management. The materials were EL-509 [55777-63-4], Proxazolon [61132-29-4], MBR-12325 [53780-34-0], chlorflurenol [2464-37-1], Sustar [47000-92-0], and maleic hydrazide [123-33-1]. Proxazolon and MBR-12325 retarded growth more than the other materials, but Proxazolon was slower acting than MBR-12325. EL-509 was the only material that did not significantly retard growth. Approx. 53780-34-0 and 53706-85-7 are also in the experiment. 4 weeks after initial application, turf that had been significantly reduced in growth, grew faster than untreated. All materials caused an unacceptable discoloration lasting 2-3 weeks. Lower rates tended to cause less discoloration, but growth suppression did not last as long as higher rates. Turf treated with MBR-12325 had a significant accumulation of TNC, but this occurred only after discoloration subsided. Of the materials used in this expt., only MBR-12325 appeared to have potential for retardation of fine turf; however, discoloration was unacceptable at the rates used. The other materials could be of use on hazardous-to-mow, non-use, or other areas where discoloration would not be objectionable. .