MARINE BORER STUDIES: EVALUATION OF TOXICANTS

1955 ◽  
Vol 33 (4) ◽  
pp. 327-338 ◽  
Author(s):  
P. C. Trussell ◽  
C. O. Fulton ◽  
C. J. Cameron ◽  
B. A. Greer

Of 115 compounds tested for toxicity to adult Bankia setacea imbedded in wooden blocks, the most toxic was sodium arsenite, which gave a complete kill at 25 p.p.m. (as arsenic trioxide) after 18 hr. exposure. The relative toxicity of chemically pure sodium arsenite and various commercial concentrates to Bankia setacea was measured. The minimum concentration of sodium arsenite necessary to completely kill adult Bankia setacea was determined for exposure periods ranging from 10 min. to 24 hr. Limited observations were made on the toxicity of sodium arsenite to Limnoria lignorum and Limnoria tripunctata.

1937 ◽  
Vol 15c (9) ◽  
pp. 442-449 ◽  
Author(s):  
W. H. Cook ◽  
J. M. Manson ◽  
T. K. Pavlychenko ◽  
P. Garrow

Of 15 chemicals applied to perennial weeds over the same range of dosages, only five appear to possess a useful toxicity as judged by the number of living plants 12 months after treatment. The effective chemicals can be classified into three groups according to their toxicity, (i) sodium chlorate; (ii) barium chlorate and arsenic pentoxide; and (iii) ammonium thiocyanate and sodium arsenite. The relative toxicity of these three groups of chemicals, judged from the certainly lethal dosage, appears to fall in the proportions of 1:1.5:> 2.


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