Sesone (2,4-Dichlorophenoxyethylsul fate) 
At a pH of 3.0 - 4.0, the ethanol analog of 2,4-dichlorophenoxy- 
ethylsulfate was formed by hydrolysis. Above pH 5.5, this reaction ceased 
unless microflora were present. In the presence of Bacillus Cereus var. 
Mycoides, activation proceeded via enzymatic hydrolysis and oxidation 
probably to 2,4-dichlorophenoxyacetate (47, 49, 228, 229, 1452, 1453, 
1454). 
DCH -CH,~0-SO,,-ONa 0-CH)-CH, 0H 

—_—_> 

Cl 
Sesone Sesone 2,4-D 
Alcohol 
Sul Fur 
The basis of toxic action of sulfur is not clear. It is reduced to 
HoS by fungal spores but this does not account for its toxicity (1009). It 
has been suggested that sulfur acts as a hydrogen acceptor in metabolic 
systems, thereby disrupting normal hydrogenation and dehydrogenation re- 
actions. It has also been suggested that polysulfide free radicals may form 
cross linkages with protein and other cellular components. Studies have also 
shown that sulfur blocks enzymes in the pathway between acetate and citrate 
and partially in the succinoxidase systems (1120, 1310). 
289 
