68 



is presente^l to show the probable existence of 2 distinct forms of this species. 

 The fe.nale type of A. vestitus is redescribed . Male- genitalia and the meta- 

 tibiae f both sexes of the 2 species are illustrated. 



121. BU..C, E. C; Lloyd, E. P.; and Smith, D. B. 1968. A flail machine for 

 destroying fallen cotton squares infested vith boll weevils. J. Eccn. 

 Entomcl. 61: 1-3. 



During the 1965 growing season, a flail machine was used in 4 cottonfields to 

 destroy fallen cotton squares infested with boll weevils, Anthonomus grandis 

 Boheman. Treatments were begun before Ist-generation boll weevils emerged and 

 were continued each week until the treatments began to damage the mature fruit 

 on the plants. Two fields contained a relatively low overwintered population 

 of weevils (46 weevils per acre) , and 2 contained a moderately high overwintered 

 population (82 weevils per acre). Results in the 4 fields were compared with 

 those in 2 fields with an overwintered populition of 98 weevils per acre that 

 was treated with insecticide. The test indicated that the boll weevil can be 

 controlled by destroying an average 88.8% of the fallen squares, provided that 

 movement into the fields is negligible. Adult populations in fields treated 

 with the flail machine remained stable throughout the treatment and they were 

 slightly higher than in the fields treated with insecticide. The number of egg- 

 punctured squares per acre was higher in the fields treated with the flail 

 machine, but in only 1 field did the percentage of egg-punctured squares exceed 

 the 10% damage level recommended for beginning the application of insecticide. 

 After flail treatments were terminated, 2 to 4 insecticide treatments were nece- 

 ssary to provide complete crop protection. 



122. ; Lloyd, E. P.; and Smith, D. B. 1969. Control of the boll weevil by 

 mechanically destroying fallen infested cotton squares. J. Econ. Entomol. 

 62: 862-865. 



