499 



insecticides tested against larvae of tobacco budworm. Endrin applied as a conven- 

 tional spray was toxic to bollworms but not to tobacco budworms; when it was applied 

 as ULV and conventional sprays, 83 and 89%, respectively, were lost from cotton 

 foliage after 4 days. Lindane was the most toxic of 4 benzene hexachloride isomers 

 applied as conventional sprays against lairvae of the tobacco budworm. General 

 Chemical GC-9287 (1, la, 3, 3a, 4, 5, 5a, 5b, 6-decachlorooctahydro-2-methyl-l, 3, 

 4-metheno-lH-cyclobuta [cd] pentalen-2-ol) applied as a conventional spray at a 

 rate of 0.56 kg/ha gave 100% kill of larvae of tobacco budworms. 



986. , and Redfern, R. E. 1968. Toxicity of five carbamate insecticides to 

 the two-spotted spider mite and larvae of the southern armyworm and the 

 tobacco budworm. J. Econ. Entomol. 61: 580-581. 

 Of the 5 carbamates duPont 1179 caused the greatest mortality to tobacco bud- 

 worm larvae in laboratory and field cages and to the southern armyworm in the 

 laboratory/. DuPont 1642 was 2nd in effectiveness Co bobh lipidopteran species 

 but more effective than the other materials against boil weevils. DuPont 16424 

 followed by duPont 1519 was most toxic to the two-spotted spider mites and 

 duPont 1642 was most toxic as a systemic insecticide. 



98IZ. Wollenberg, R. H., and Peries, R. 1979. Efficient synthesis of insect 

 sex pheromones emitted by the boll weevil and the red bollxTOrm moth. 



Tetrahedron Let. 4: 297-300. 

 Two pests responsible for major destruction of cotton crop are the boll weevil 

 (Anthonomus grandis Boheman) and the red bollworm moth ( Dipan -^'-sis castanea 

 Hampson) . This letter describes facile syntheses of two of t'c four terpenoid 

 compounds emitted by male boll weevils (stereo-isomcrs correi^^^jnding to 1) and 

 also a potent sex pheroraone produced by the virgin female red bollworm moth (2) 

 The routes described use in key steps our recently developed nucleophilic 

 acetaldehyde equivalent, (Z)-2-ethoxyvinyllithium (3). 



