423 



of removal efficiency. 



830. , and Jurt, E. C. 1970. Effects of the size of ULV droplets within 

 cotton foliage both inside and immediately downwind from a treated 

 swath. J. Econ. Entomol. 63: 1400-1405. 

 Results of field tests using controlled sizes of droplets showed that uni- 

 formity of deposit in the treated area increased by both controlling sizes 

 and by increasing the size of droplets. Drops per square inch deposited 

 within cotton foliage were sampled on 1-ft intervals. The deposit at a 

 particular level was found to be 50% of the deposit taken 1-ft above the 

 given sample. A droplet of approximately 140 u appears to be the minimum 

 size that can be released, without other controlling factors, and be de- 

 posited dependably in or near the treated area. 



r ' 



831. ; Burt, E. C; and Lloyd, E. P. 1975. Selection of optimum spray- 

 droplet sizes for boll weevil and drift control. J. Econ. Entomol. 

 68: 415-417. 

 Within the limits of the droplet sizes tested, smaller droplets provided 

 better plant coverage and, thus, insect control, but also increased drift. 

 Therefore, a compromise was necessary in determining an acceptable droplet 

 size that would provide good coverage withou?" increasing drift. For ULV 

 aji^Jtrcartons of azmphosmethyl with ground equipment, a droplet si«e between 

 140 and 200 ii provided an adequate solution for control of Anthonomus grandis 

 Boheman and drift problems. 



\ - 



832. ; Threadgill, E. D.; and Burt, E. C. 1973. Aerodynamic testing of 



cotton squares. Trans. ASAE 16: 222-226. 

 Design data for the development of improved equipment to capture fallen boll 

 weevil infested cotton squares have not been available. Due to the lack of 



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