^' '\ 



ttiiiiuiaiiBttaBus: 



g 12 



% 



R calculated amount applied. Total recoveries of the undiluted formulations 



i 



X were consistently lower than those of the water-diluted emulsifiable zow- 



\ centrates. 



\ 15. Armenta, C. S. 1975. Evaluation of insecticides for control of the 

 J • boll weevil in cotton in the "Valle del Fuerte," Sinaloa, Mexico. 



I Folia Entomol. Mex. 33: 18. (In Spanish). 



I In test 1, Fustion at 1/ha and endrin at 292 gs + methyl parathion at 675 



I gs of active ingredient per/ha were the most effective against the boll 



i weevil. In test 2, nuvacron at A50 gs/ha was more effective than endrin 



1 



I at 292 + methyl parathion at 675 gs/ha. 



i 

 i 



I 16. and Rodriguez, V. J. 1974. Seasonal fluctuations of arthropods in 



i 



j cotton plants in the "Valle del Fuerte," Sinaloa, Mexico. Folia 



i Entomol. Mex. 28: 57-61. (In Spanish). 



i Weekly samplings were made in four cotton fields near the Agricultural Experi- 



1 ment Station of "Valle del Fuerte", Sinaloa, in order to know about the inci- 



\ dence of insect pests and beneficial insects. It was found that aphids occur 



j 



i during the first half of the plant cycle. The bollworm showed its highest 



r 



incidence by the middle of April, while the boll weevil started to increase. 

 Cotton leaf perforator reached its highest levels starting early in June. Inci- 

 dence of beneficial insects was higher during the last two weeks of April. 



17. Armstrong, A. A.; Parker, R. D.; Walker, J. K. ; Niles, G. A.; and 



Mulkey, J. R. 1980. A comparison of boll weevil damage (%) to bolls 

 in different cotton genotypes. Southwest. Entomol. 5: 6-11. 

 Studies during 1975 and 1978 at Uvalde, TX indicated that the cotton variety 

 TAMCOT SP-37 experienced a lower % damage to boll locks from boll weevils than^ 

 several experimental cotton genotypes. A more rapid establishment of bolls 

 earlier in the fruiting period may be responsible for this advantage in 

 TAMCOT SP-37. 



