Plant Regulator Residues, Residual Activity of 3-Amino-1,2,4-triazole in Soils

Sund, Kenneth A.

doi:10.1021/jf60059a004

Cited by 57 publications

(16 citation statements)

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“…Toxicants that are weakly charged posi tively, like the triazine herbicides and amitrole, are more available, although they are sorbed to some extent (13,224,225) and sorption does increase with decreasing pH (13,225). Sorption of these latter toxicants, however, is readily reversible; and a significant concentration can be maintained in the soil solution in equilibrium with that which is sorbed.…”

Section: Distribution Of Toxicants Between Soil Water and Soil Solidsmentioning

confidence: 99%

Physical Aspects of Soil in Relation to the Action of Soil Fungicides

Goring¹

1967

Annu. Rev. Phytopathol.

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Section: Distribution Of Toxicants Between Soil Water and Soil Solidsmentioning

confidence: 99%

Physical Aspects of Soil in Relation to the Action of Soil Fungicides

Goring¹

1967

Annu. Rev. Phytopathol.

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“…They con cluded that the fate of amitrole in soil is governed princi pally by the presence and activity of soil microorganisms, adsorption by soil constituents, and chemical reactions in the soil. In contrast, Sund (24) proposed that the disap pearance of amitrole from some soils was due largely to a combination of complexing and adsorbing actions. When amitrole decomposition could not be closely associated with soil classification, texture, base exchange capacity, or adsorption, other authors (7) attributed the variable rate of amitrole decomposition to differences in microbial populations or levels of microbial activity.…”

mentioning

confidence: 99%

Chemical Versus Microbial Decomposition of Amitrole in Soil

Kaufman¹,

Plimmer²,

Kearney

et al. 1968

Weed sci.

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Degradation of 3-amino-l,2,4-triazole-5-C14 (amitrole-5-C14) in autoclaved, potassium azide, ethylene oxide, and dry-heat sterilized soil was compared with that observed in nonsterile soils by measuring evolved C14O2. Amitrole degradation occurred in azide and ethylene oxide-sterilized and nonsterile soils but not in autoclaved soils. Only slight degradation occurred in autoclaved soil re-inoculated with mixed cultures of soil microorganisms isolated from soil in which amitrole had been rapidly degraded. Addition of EDTA-Na to nonsterile and ethylene oxide sterilized soils reduced amitrole degradation. Addition of organic amendments to amitrole treated soil stimulated microbial activity but reduced amitrole degradation. Addition of specific metallic salts to certain soils increased the rate of amitrole degradation. Amitrole degradation occurred rapidly in several free radical generating chemical systems. These results and additional observations indicate that amitrole degradation, at least in three soils examined, was largely a chemical process, and that microbial involvement was only indirect.

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“…In view of tbis possibility we have explored the effects of 3-AT and till' ^'lucosi' addtu-t of 3-AT on the hexokinase reaclion. This reaction is not atlccted by 3-Ar, although 3-AT is capable of chelaliiiK metals (1,7) and forms a .solid complex with magnesium [MRCIL {3-AT14 • 8H2O] (! )• However, it does not necessarily follow that 3-AT sht)nld chelate the magnesium of hexokinase.…”

Section: Discussionmentioning

confidence: 99%