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152 



developed to endrin but not to azinphosmethyl. The most important finding was 

 that che laboratory-developed toxaphene-DDT-resistant culture exhibited cross- 

 resistance to 3 organophosphates (5- to 12-fold) and 2 carbamates (40-fold or 

 greater) . Two endrin-resistant cultures exhibited lower levels of cross-resis- 

 tance to these same materials. 



287. Griffin, J. G. 1978. A system for the egg planting operation in boll 

 weevil mass rearing. Trans. ASAE 21: 469-472. 



Equipment consisting of an in-line form-fill machine; a semi-automatic liquid 

 filter; a refrigerated cooling unit; a weevil egg planting unit, and a grandular 

 material filler were developed and/or modified and installed into a system to 

 mechanize the egg planting operation in boll weevil mass rearing. The size of 

 the system developed was capable of producing, filling and planting approxi- 

 mately 700 tray units per hour which with normal yeild should produce approxi- 

 mately 250,000 adult weevils. The system required about 11 percent as much 

 hand labor as the previous planting operation and most of this labor was 

 utilized in stacking the planted tray units. 



288. . 1979. Actuator system for operating small ball valves. U.S. Sci. 

 Educ. Adm. Adv. Agric. Technol. South. Ser. (ISSN 0193-3728), No. 2, 

 4 pp. 



The system consists of two-way ball valves; a liquid manifold; an air-valve 

 manifold with four-way, electrically operated air valves; double-acting air 

 cylinders; and a recycling timer-switch unit. The parts are mounted on a metal 

 frame. The system was developed for use in the manufacture of food pellets for 

 boll weevils but could be adapted to operations requiring one or more flow- 

 control valves to be operated in sequence or all at once. 



