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RESIDUES OF METHOMYL IN RAPE PLANT AND SEED FOLLOWING ITS APPLICATION FOR THE CONTROL OF BERTHA ARMYWORM, MAMESTRA CONFIGURATA (LEPIDOPTERA: NOCTUIDAE)1

Published online by Cambridge University Press:  31 May 2012

Y. W. Lee ,
R. J. Ford ,
H. McDonald ,
K. S. McKinlay ,
L. G. Putnam  and
J. G. Saha
Y. W. Lee
Affiliation:
Research Station, Canada Agriculture, Saskatoon, Saskatchewan
R. J. Ford
Affiliation:
Research Station, Canada Agriculture, Saskatoon, Saskatchewan
H. McDonald
Affiliation:
Research Station, Canada Agriculture, Saskatoon, Saskatchewan
K. S. McKinlay
Affiliation:
Research Station, Canada Agriculture, Saskatoon, Saskatchewan
L. G. Putnam
Affiliation:
Research Station, Canada Agriculture, Saskatoon, Saskatchewan
J. G. Saha
Affiliation:
Research Station, Canada Agriculture, Saskatoon, Saskatchewan
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Abstract

Residues of methomyl in rape plants and seed were determined after its application for bertha armyworm control. In one experiment application of 3 oz of methomyl per acre left 17 p.p.m. residue on the rape plants immediately after application. This level rapidly declined to 1.5, 1.0, 0.4, and 0.2 p.p.m. 1, 2, 5, and 9 days later, respectively, and no residue was detected (less than 0.02 p.p.m.) in seed harvested 22 days after application of the toxicant. Rape plant samples collected from several farms immediately after the application of 3 to 4 oz of methomyl per acre had 2.5 to 16 p.p.m. residues, indicating inefficient application of the insecticide in some cases. Analysis of rape seed samples collected from 36 farms showed little residue in three samples (0.02 to 0.03 p.p.m.) and none in 33, indicating that the use of methomyl for bertha armyworm control is not likely to contaminate rape seed with undesirable levels of residues.

Type
Articles
Information
The Canadian Entomologist , Volume 104 , Issue 11 , November 1972 , pp. 1745 - 1750
Copyright
Copyright © Entomological Society of Canada 1972

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References

Baron, R. L.Toxicological considerations of metabolism of carbamate insecticides, methomyl and carbaryl. Presented at the International Symposium on Pesticide Terminal Residues, IUPAC, Tel Aviv, Israel, February 17–19, 1971. Unpublished.Google Scholar
Creighton, C. S., McFadden, T. L., and Cuthbert, R. B.. 1971. Control of caterpillars on tomatoes with chemicals and pathogens. J. econ. Ent. 64: 737–739.Google Scholar
Green, G. L. and Workman, R. B.. 1971. Cabbage looper control on collards in Florida. J. econ. Ent. 64: 1331–1332.CrossRefGoogle Scholar
Harvey, J. Jr.Metabolism of S-methyl-N-(rnethylcarbamoy1)-oxythioacetimidate in soil and cabbage. Presented at the American Chemical Society Meeting in Los Angeles, Calif., on March 30, 1971. Unpublished.Google Scholar
Hill, K. R. 1970. IUPAC Commission on terminal residues. J. Ass. Offic. Anal. Chem. 53: 987–994.Google Scholar
McDonald, H. 1972. The bertha armyworm crisis. Can. Agric. 17(1): 10–12.Google Scholar
Pease, H. L. and Kirkland, J. J.. 1968. Determination of methomyl residues using microculometric gas chromatography. J. Agric. Food Chem. 16: 554–557.Google Scholar
Saha, J. G., Bhavaraju, B., Lee, Y. W., and Randell, R. L.. 1969. Factors affecting extraction of Dieldrin-14C from soil. J. Agric. Food Chem. 17: 877–882.Google Scholar