1. Mention of a trademark, proprietary product or vendor does not constitute a guarantee or warranty of the product by the U.S. Department of Agriculture and does not imply its approval to the exclusion of other products or vendors that may also be suitable.
2. Hamlin, J. C., Lieberman, F. V., Bunn, R. W., McDuffie, W. C., Nenton, R. C., and Jones, L. J., USDA Tech. Bull. No. 975 (1949) 84.
3. Simpson, R. G., and Welborn, C. E., Envir. Ent.4 (1975) 193.
4. Tumlinson, J. H., Gueldner, R. C., Hardee, D. D., Thompson, A. C., Hedin, P. A., and Minyard, J. P., Science166 (1969) 1010.
5. Hedin, P. A., Burks, M. L., and Thompson, A. C., J. agric. Fd Chem.33 (1985) 1011.