A22 



828. , and Ourth, D. D. 1979. Phagocytic and humoral iramunity to Scrratla 

 marcFScens of the adult cotton boll weevil, AnthonomuB grandis . Fed. 

 Proc. Fed. Am. Soc. Exp. Biol. 38: 1002. _ ■;..•■'• 



This investigation determined phagocytic, lysozy,iial and bactericidal defensive 

 responses of adult laboratory-reared cotton boll weevils. Phagocytosis was 

 first demonstrated in boll weevils at 3 hours following injection of live 

 Serratia m^ ircescens . Maximum phagocytosis of 16% of plasmatocytes examined 

 was found at 16 hours post-injection. Lysozyme activity was demonstrated in 

 both inoculated and uninoculated boll weevils. A mean lysozyme activity peak 

 of 7 Mg/ml was found at 48 hours following inoculation of heat-killed Serratia 

 marcescens . Bactericidal activity was demonstrated in inoculated boll weevils 

 but not in uninoculated boll weevils. A mean bactericidal activity peak occurred 

 at 24 hours following inoculation of heat-killed Serratia marcescens . Lysozymal 

 and ba. ■■, '.ricidal activities were shown to be separate functions. 



829. Smith, D. B. 1977. Equipment for capturing fallen cotton squares. U.S. 

 Dep. Agric. Tech. Bull. 1561, 16 pp. 



Equipment to relocate and remove fallen boll weevil infested cotton squares 

 was designed, constructed, and evaluated. Circular brushes mounted in tan- 

 dem moved more squares away from the row area than a similar single brush. 

 Neither brush system moved adequate numbers of squares beyond 30.5 cm. The 

 addition of ah air nozzle to the tandem brush system increased square move- 

 ment, at 8.1 km/hr ground speed, from 53.4 to 62 percent beyond 25.4 cm. A 

 variable profile nozzle was more effective and versatile than a constant area 

 nozzle for removing fallen squares. Square removal and capture tests were 

 run with a two-row, high-clearance machine equipped with 33-cm length nozzles. 

 This equipment removed about 80 percent of the squares and retained over 60 

 percent of the total fallen squares. Separation and deflection plates in 

 the plenum chamber increased the square retention efficiency at the expense 



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