Reference

Side effects of herbicides on soil organisms after one or several applications

Side effects of herbicides on soil organisms after one or several applications. 3. Laboratory experiments: test program, results obtained for bacterial and fungal spreading density, dehydrogenase activity, and soil respiration after several applications. Hickisch, Brigitte; Machulla, Galina; Mueller, Georg, Jr. (Sekt. Pflanzenprod., Martin-Luther-Univ. Halle, Wittenberg, Ger. Dem. Rep.). Zentralbl. Mikrobiol., 139(2), 119-28 (German) 1984. CODEN: ZEMIDI. ISSN: 0232-4393. DOCUMENT TYPE: Journal CA Section: 5 (Agrochemical Bioregulators) Section cross-reference(s): 4, 19 Amending loam samples 5 times at 2-wk intervals with rates of SYS 67MB (MCPB Na salt; I) [6062-26-6] corresponding to 2 kg, Tribunil (II) [18691-97-9] 3 kg, Bi 3411 (trichloroacetal dehydrate; III) [302-17-0] 20-50 L, or Wolfen-Thiuram (IV) [137-26-8] 2 kg/ha stimulated bacterial growth (the stimulation was esp. strong for IV) with a frequency decreasing with increasing no. of applications, whereas 3 kg Azaplant (amitrole; V) [61-82-5]/ha and esp. 200 kg Agrosan (Na chlorate, VI) [7775-09-9]/ha inhibited the bacterial growth with a frequency increasing with the no. of applications. Fungi were more susceptible, esp. to IV, V, and VI, whereas II stimulated their growth. All compds., with exception of I, severely inhibited soil dehydrogenase [9035-82-9] and CO2 evolution, esp. II, III, and V.

Enhancement of herbicidal effect of sodium chlorate

Enhancement of herbicidal effect of sodium chlorate. Kantan, Akira; Yamaguchi, Hirotada; Komura, Yoshihiko (Showa Denko K. K., Japan). Japan. Kokai JP 52122621 15 Oct 1977 Showa, 3 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: A01N011-00. APPLICATION: JP 76-37273 5 Apr 1976. DOCUMENT TYPE: Patent CA Section: 5 (Agrochemicals) The herbicidal effects of NaClO3 [7775-09-9] is markedly enhanced by nonionic surfactants having <15 HLB (hydrophilic-lipophilic balance) value. Thus, in pot tests postemergence application of 15 kg NaClO5/10 are in 0.5% Noigen ET-135 (polyethylene glycol alkyl ether) [65546-76-1] (13 HLB) completely controlled Digitaria in 7 days, whereas NaClO3 alone controlled only 20-29% of the weed.