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A13 



808. Russell, W. G., and Mullins, J. A. 1969. A new technique for determining 

 direct impingement of insecticides on boll weevils. J, Econ. Entomol. 

 62: 1122-1123. ' ■' 



The direct impingement of insecticides on Anthonomus grandls Boheman was 

 determined by affixing the weevils in toothpicks and placing them in the 

 target area prior to insecticidal applications. While affixed to the tooth- 

 picks, the weevils lived in the field for approximately 7 days. Fluores- 

 cent particles were agitated with the insecticides and the size of spray 

 droplets was calculated indirectly by the number of fluorescent particles 

 that impinged on each weevil. Mortality occurred when the sum total of 

 droplets, regardless of size, that impinged upon a weevil carried 4 more 

 more particles. 



809. Schuster, M. F., and Doling, J. C. 1969. Insect sterilant experiments 

 with apholate and five bifunctional aziridine chemicals in outdoor 

 cages against tae boll weevil. J. Econ. Entomol. 62: 1372-1375. 

 In 1964 and 1965, six bifunctional aziridine chemicals were compared as 

 sprays on caged cotton as sterilants for control of Anthonomus grandis 

 Boheman. Comparisons were made of the numbers of sterile eggs found, egg- 

 punctured squares that developed to bolls, and the total bolls produced. 

 Phytotoxicity to plants was noted. In order of decreasing effectiveness the 

 chemicals were: DM 53264 (N,N'-(4-methyl-m-phenylene)bis-(l-aziridniecaboxa~ 

 mlde)), CM 53061 (l-[bis(l-aziridinyl) phosphinyl] 3-(3,4-dichlorophenyl) 

 urea), apholate, CM 53139 (N,N') hexamethylenebis (1-aziridinecarboxamide)) , 

 CM 33386 (N,N')-(4-methyl-m-phenylene)bis[2-methyl-l-aziridinecarboximide) , 

 and CM 2797 (3,9-bis(l-aziridinyl)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5] 

 undecane 3,9-dioxide. 



