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69 



Replicated tests were conducted in 1966 in semi-isolated fields in Carroll County, 

 Mississippi, to control Anthonom us grandis Boheman by mechanically destroying 

 fallen infested cotton squares with a flail-type machine. Control in the flail- 

 treated fields was compared with fields treated with ultra low volume (ULV) 

 applications of azinphosmethyl at 0.125 lb/acre applied at 5-day intervals. 

 Flail treatments were made until the machine damaged mature fruit on the plants. 

 Thereafter, the flail fields were sprayed with ULV applications of azinphosmethyl 

 at 0.125 lb/acre. Results indicated that the boll weevil can be controlled with 

 a flail-type machine by destroying fallen infested squares as long as the machine 

 can be operated in the field. However, when tue plants become heavily fruited 

 the machine damages the mature fruit. During the season the flail machine 

 picked up an average of 95.3% of the squares that were on the ground. 



123. ; Lloyd, E. P.; Smith, D. B.; McCoy, J. R.; and 'ingle, F. C. 1970. 



Boll weevil control with insecticide applied in sprays with narrow= 



spectrum droplet sizes. J. Econ. Entomol. 63: 365-370. 

 Results of tests initiated in 1967 to determine the effect of size of spray drop- 

 lets on boll weevil control showed that adequate control could be obtained with 

 0.125 lb per acre of azinphosmethyl applied in ultra-low-volume (ULV) sprays with 

 dio plet sizes of 140, 200, or 300 u at 4- to 5-day intervals. The treatments 

 were as effective as a wide spectrum of droplet sizes applied with a spinning-disc 

 sprayer. Azinphosmethyl applied at 0.0625 lb per acre on a 4- to 5-day schedule 

 in a ULV spray in droplet sizes of 100 and 140 n was as effective as when it was 

 applied in a wide spectrum of droplet sizes at 0.125 or 0,0625 lb/acre. Sprays 

 with droplet sizes of 200 m gave marginal control when used to apply azinphosmethyl 

 in a ULV spray at 0.0625 lb/acre on a 4- to 5-day schedule and control with 300 u 

 droplets under the same conditions was inadequate. 



