,l i ^J1. l lll'. i M.." I ^W* ' "'!!*, ' ' ■ W.'J'-lll.'M ' jUU ' , W I JI.L. J l j ii W»IJ».» l i l ll l , l |l]ll i »u,t i ).ii.l i u ri|» j.iJ i|i ij «. - l > 1.1 ) 1 . 5l«linyijj i »^i^ <l lj<j^j>. i j.M ii» i i J^. -».»ii < ■ I LI. lnmi. ! J P ' i ' mVDi'K" m^W ^ ' f ■ ■ . I » ■ i J i . i i ^ 



205 



in scil after 32 h at either 32 or 21°C. Losses of grandlure from water 

 were Less rapid than soil; all components were dissipated from water within 

 hours at 32°C. The physical barrier grandlure formulations currently in 

 use showed no tendencies toward excessive soil and water contamination 

 even under extreme conditions. 



397. ; Thompson, A. C. ; Gueldner, R. C. ; and Hedin, P. A. 1971. Phospho- 

 lipid composition of the boll weevil, Anthonomus grandis Boheman. 

 Lipids 6: 352-355. 



When phospholipids of newly-emerged adults of the boll weevil, Anthonomus 

 grandin Boheman, were studied in detail, phosphatidyl choline and phosphatidyl 

 ethanolamine were found to be the major phospholipids; sphingomyelin and 

 cardiolipin were present in smaller amounts, and four other minor components 

 were identified. Fatty acid analyses performed on the intact phospho- 

 lipids and on the enzyme degradation products of phosphatidyl choline and 

 phosphatidyl ethanolamine demonstrated that oleic and linoleic acids were 

 the major fatty acids present in the glycerophosphatides; the sphingomyelin 

 contained fatty acids in the range of 20-22 carbons. 



398. ; Thompson, A. C; Gueldner, R. C; and Hedin, P. A. 1972. Consti- 

 tuents of the boll weevil. VII. The molting hormone: isolation studies. 

 Ann. Entomol. Soc. Am. 65: 98-102. 



The boll weevil molting hormone had the same behavior on TLC as 20-hydro- 

 xyecdysone and also showed the major absorption at 242 m;j which is characte- 

 ristic of an a, B-unsaturated ketone chromaphore. The total HFU count for 1 

 kg of pupae was 1771. HFU requirements determined in our laboratory show 

 that 1 HFU = 3.0-20 ng. Using this range of measurements, the amount of molt- 

 j.ing hormone in boll weevil pupae was calculated to be 17-35 yg/kg wet weight. 

 The amount is low compared with that for other insects and suggests either a 



