// 



415 



after insecticide was applied to control boll weevils. Plots sprayed with 

 methyl parathion resulted in fewer Heliothis larvae than did aldicarb treat- 

 ments. 



813. ; Lloyd, E. P.; and McKibben, G. H. 1975. Boll weevil control with 

 controlled releases of methyl parathion (a preliminary report). Miss. 

 Agric. For. Exp. Stn. Res. Rep. 1, 2 pp. 



Controlled release formulations of methyl parathion prolonged the effective 

 kill of boll weevils. The residual toxicity of the controlled release for- 

 mulations did not appear to be reduced appreciably by heavy rainfall or high 

 temperatures. Further testing is indicated by our promising preliminary re- 

 sults. 



814. , and McKibben, G. H. 1978. Toxicity of black pepper extract to boll 

 weevils. J. Econ. Entomol. 71: 343-344. 



Extracts of ground black pepper were highly toxic to adult Anthonomus grandis 

 Boheman when they were applied topically to the 3- to 5-day-old insects. The 

 24-h LDcQ value was 9.6 pg/insect. 



815. ; Smith, D. B.; and Lloyd, E. P. 1974. Direct and residual kill of 

 the boll weevil with ULV sprays of azinphosmethyl. J. Econ. Entomol. 

 67: 408-410. 



Tests in field plots showed that size of spray droplets, dose, and volume of ULV 

 azinphosmethyl applied per acre were all highly significant in determining morta- 

 lity Of Anthonomus grandis Boheman when exposed to the residues. As volume 

 applied per acre was increased, kill decreased. Kill by direct impingement of 

 the droplets was less than 32%. The overall ratio between kill by residue and 

 by direct impingement was over 4.0. With spray droplets in the size range of 

 100-200 \m.y kill by direct impingement is less impoitant than kill by residue. 



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