JrT I i" '* ' '1 ™^— '"■■*^"*" '■• "^-^—'^-riTr'ir iiibi m 



210 



the primary monoacetate of the diol 33 gave a mixture of 9-acstoxymethyl-a- 

 and 3-pinenes (41 and 42). Oxidation of the mixture of 41 and 42 with 

 chromium trioxide in pyridien gave the enone 44, which was hydrogenated to 

 give 2aH-9-acetoxymethylpinan-4-one (45). Photolysis of 45 gave the aldehyde 

 46, containing approximately 10% of the cyclobutene 47. Decarbonylation of 

 46 using chlorotris (triphenylphosphine) rhodium gave grandisol acetate 

 (1, R=Ac) (overall yield from (-)-6-pinene (3.5%)) which was converted into 

 (+) -grandisol, (+)-(lR, 2S)-l-methyl-l-(2-hydroxy)ethyl-2-isopropenylcyclo- 

 butane. 



407. Hollingsworth, J. P.; Witz, J. A.; Hartstack, A. W. ; Lopez, J. D. ; and 

 Bull, D. L. 1978. Retention efficiency of the Leggett boll weevil trap. 

 Southwest. Entomol. 3: 198-208. 



Retention eff icier ^y of the grandlure baited Leggett trap for the boll weevil, 

 Anthonomus grandis Boheman, was determined with the assistance of electrical 

 grids. Leggett traps mounted within energized electrical grids (LLG) were 

 compared with Leggett traps mounted within unenergized grids (LDG) and with 

 Leggett traps used in the conventional manner (L.). Traps LLG and L caught 

 equal numbers of boll weevils during a season-long trial. Catches in the LDG 

 trap were less than 1/3 as great as catches in the other trap types. There 

 was no significant difference in response of males and females to the diffe- 

 rent trap types. Use of these trap catch data in trap performance equations 

 showed that the retention efficiency of the Leggett trap was ca. 50%. This 

 value was in agreement with data from observations in which only 1 weevil 

 was trappc J from each 2 weevils seen landing on the trap. 



408. Hopkins, A. R. , and Moore, R. F. 1980. Insecticides: efficacy against 

 various cotton pests and effect on plant maturity, yield, and quality 

 of seed and lint. J. Econ. Entomol. 73: 739-744. 



