195 



The four monoterpene compounds [1, (+)-£is~2-isopropenyl-l-methycyclobu- 

 taneethanol; II, (Z)-3,3-dimethyl-Al . ^-cyclohexaneethanol; III, (Z)-3,3- 

 dimethyl-A^'^-cyclohexaneacetaldehyde; and IV, (E)-3,3-diinethyl-Al »"- 

 cyclohexaneacetaldehyde] which comprise the pheromone of the male boll 

 weevil, Anthonomus grandis . were determined daily thioiighout the life span 

 of the insect by GLC analysis of the whole body and the frass. The total 

 content of the components in the male is never greater than 210 ng, the 

 average content in the frass produced during 1 day is 1268 ng, and the 

 lifetime production is at least 40,000 ng. The ratio of the four components 

 in frass is 6:6:2:1/1; II: III:IV. None of the four components was found in 

 females, but female frass contained traces in three instances. These data 

 can be used to compare the potential attractancy of insects from various 

 geographical areas, at different seasons, in different nutritional states, 

 and after chemosterilization. Such differences in potential insect attrac- 

 tiveness could be crucial to effective large-scale control programes. 



379. ; Jenkins, J. N. ; and Maxwell, F. G. 1977. Behavioral and develop- 

 mental factors affecting host plant resistance to insects. J[n P. A. Hedin 

 (ed.), Host Plant Resistance to Pests. Symposium Series, American Chemical 

 Society, Ch. 16: pp. 231-275. 



Aspects reviewed included biologically active compounds in plants affecting 

 insect behavior including feeding stimulants, plant attractants, feeding 

 deterrents, repellents, oviposition stimulants. The effects of toxins on 

 growth in the European corn borer, Heliothls spp. and legume insects, and 

 nutritional factors in plants affecting survival and development of insects 

 including antibiosis and preference were also reviewed. 



