H. Aller, J. Dewey
Jun 1, 1961
Citations
0
Influential Citations
4
Citations
Journal
Journal of Economic Entomology
Abstract
Twenty-three materials were screened as potential adjuvants to increase the residual effectiveness of Phosdrin® (1-methoxycarbonyl-1-propen-2-yl dimethyl phosphate) on fourth instar larvae of Mexican bean beetle ( Epilachna varivestis Muls). Phosdrin residues 24, 48, and 72 hours old were infested and mortality observed after periods of 24 and 48 hours. The gross performance of each concentration of each material was compared with the performance of Phosdrin standard treatments. Six materials appeared promising. They are Experimental Plyac® (polyethylene formulation), Prorex-l® (high paraffin petroleum oil), Dri-Die 67®(silica aerogel), Nuchar C-115N®(active carbon), Cellosizc® WP-4400 (hydroxyethyl cellulose polymer), and Methocel® MC-4000 cps. (methyl cellulose polymer). Of these, the last two were outstanding. At 2%, both of these water soluble cellulose ether polymers more than doubled the residual efficacy of Phosdrin. Methocel alone was found toxic and thus may not act as an adjuvant in this instance.