232 



446. ; Cross, W. H. ; McGovern, W. L. ; and Mitchell, H. C. 1973. Biology of 

 Heterolaccus grand is in a laboratory culture and its potential as an 

 introduced parasite of the boll weevil in the United States. Environ. 

 Entomol. 2: 112-118. 



Heterolaccus grandis Burks parasitizes the 3rd instar of Anthonomus grandis 

 Boheman in parts of Costa Rica, Nicaragua, Guatemala, and Mexico. It has 

 been described as a primary parasite of this pest. In the laboratory, the 

 developmental period was 15-17 days for males and 17-18 days for females at 

 24-27''C and 45±2% RH. The incubation period for the egg was 27-29 hours. 

 The larvae, which were cannibalistic, have 3 stadia and a larval period of 

 4.5-5.5 days. The pupal stage was 6-7 days for males and 8 days for females. 

 Oviposition began 3-4 days after adult eclosion. Females deposited an 

 average 6.38 eggs per day, an average total of 315 eggs per female. Average 

 longevity was 51.2 days for males and 65.0 days for females. The culture of 

 ii' grandis from Mexico gave no evidence of overwintering. After initial re- 

 lease in the field, percentages of parasitism of boll weevils by R. grandis 

 increased progressively during the season. 



447. ; McKibben, G. H.; Rodriguez, J. V.; Davich, T. B. 1976. Boll weevil: 

 increased longevity of grandlure using different formulations and dis- 

 pensers. J. Econ. Entomol. 69: 263-265. 



An experimental slow-release formulation of grandlure, the synthesized 

 pheromone of Anthonomus grandis Boheman, was as effective or more effective 

 for 8 wk than the standard formulation changed weekly. 



448. ; Moody, D. S.; Lloyd, E. P.; and Taft, E. M. 1978. Boll weevil: 

 egg hatch inhibition with four formulations of diflubenzuron. J. Econ. 

 Entomol. 71: 179-180. 



Four formulations of diflubenzuron containing 141.8 g Ai/ha (25% V7P in cotton 



