373 



hours. The 1st molt occurred between 36 and 42, and the 2nd between 66 and 78 

 hours after the eggs were candled and placed in the diet. 



731. ; Jenkins, J. N.; and Smith, D. B. 1973. Frego bract cotton and normal 

 bract cotton: how morphology affects control of boll weevils by insecti- 

 cides. J. Econ. Entomol. 66: 223-225. 



Azinphosmethyl and methyl parathion applied at 0.125 pound per acre left greater 

 deposits and caused higher mortality of Anthonomus grand is Boheman on frego 

 bract than on normal bract cotton squares when: (1) weevils were caged in the 

 field on the 2 types of cotton, (2) weevils were placed in 1-pint cartons with 

 squares removed from the plant after spraying, and (3) when weevils were placed 

 in cartons with squares sprayed after being picked from the plant. These 

 results were confirmed by recovery of approximately 7 times the amount of 

 residue from frego than from normal bract buds sprayed with methyl parathion. 



732. ; Maxwell, F. G.; and Jenkins, J. N. 1966. Feeding and oviposition 

 of the boll weevil, Anthonomus grand is (Coleoptera: Curculionidae) , on 

 the rose-of-Sharon, an alternate host. Ann. Entomol. Soc. Am. 59: 547-550. 



The calyx that enclosed the developing bud of the rose-of-Sharon ( Hibiscus 

 syriacus L.) until the prebloora stage deterred feeding and oviposition of the 

 boll weevil, Anthonomus grandis Boheman, on this alternate host. When the 

 calyxes were removed, weevils fed on and oviposited in the buds at about the 

 same rate as on flower buds (squares) of cotton. Although the calyxes were 

 not a morphological barrier, they contained a substance that discouraged 

 weevil feeding and oviposition during the bud stage of development and con- 

 tributed to rose-of-Sharon' s undesirability as a host. Field observations 

 shoved that infestation of rose-of-Sharon by the boll weevil occurs only when 

 the plant grows near cotton. 



