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476 



939. ; Nilakhe, S. S.; and McGovern, W. L. 1979. Field oompetltiveness of 

 sterile male boll weevils. J Ga. Entomol. Soc. 14: 114-120. 



Male boll weevils, Anthonomus grandis Boheman, were treated with either an 

 acute dose of Ramma irradiation (7.0 krad) plus a dip in a 0.027„ acetone 

 solution of diflubenzuron (N-[ [ (4-chlorophenyl) amino] carbonyl]-2,6-dif lu- 

 benzuron. 



940. Vinson, S. B.; Barfield, C. S.; and Hanson, R. D. 1977. Oviposition 

 behavior of Bracon mellitor , a parasitoid of the boll weevil ( Anthonomus 

 grandis ). 11, Associative learning. Physiol. Entomol. 2: 157-164. 



The parasitoid, Bracon m&llitor , will probe with its ovipositor plant structures 

 containing its host. The identification of methyl parahydroxybenzoate (methyl 

 parasept) , an antimicrobial additive to the serai-synthetic diet used for rearing 

 the host, as a releaser of this behavior prompted an Investigation of the parasi- 

 toid's response to this chemical. Its absence from field hosts suggested the 

 response wai, learned. Female parasitoids reared in host-infested cotton plant 

 buds from the field or in methyl parasept-f ree hosts did not respond to methyl 

 parasept alone until exposed to hosts contaminated with it. This is taken to 

 imply associative learning by the females rearAl from the methyl parasept-f ree 

 host^t A~rew responses to raethv.T pa-.asept were elicited from inexperienced fe- 

 males reared from methyl parasept -contaminated hosts, but their responsiveness 

 increased after they had been exposed to methyl parasept-contaminated hosts as 

 oviposition stimuli. These results point to the caution that must be exercised 

 In the isolation and identification of kairomones. 



941. ; Henson, R. D.; and Barfield, C. S. 1976. Ovipositional behavior of 

 Bracon mellitor Say (Hyracnoptera: Braconidae) , a parasitoid of boll 

 weevils ( Anthonomus grandis Boh.). I. Isolation and identification of 



a synthetic releaser of ovipositor probing. J. Chem. Ecol. 2: 431-440. 



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