I ■..■ . 



I 0-merhyl phenylthiophosphonate) ; Azodrin® (3-hydroxy-N-methyl- cls- crotonamlde 



i dimethyl phosphate); BAY 77488 (0,0-diethyl phosphorothioate 0;-ester with 



I phenylglyoxylo-nitrile oxime) ; and malathion + AC 47470 (P,P-diethyl cyclic 



I propylene ester of phosphonodithioimidocarbonic acid) . The use of the sprays 



t 



I resulted in varying degrees of control among the insecticides, but in most 



i instances infestations of, and damage by, the pest species were reduced and 



yields of cotton were increased. 



43. . 1970. Effect of nitrogen fertilization on the abundance of cotton 



insects. J. Econ. Entomol. 63: 1219-1220. 

 Tests were conducted from 1964 to 1966 to determine the effect of different 

 rates of nitrogen sidedress applications on the abundance of and damage from 

 cotton insects in nonirrigated cotton under a seasonal insecticidal control 

 program. Insect infestation or damage counts were made on the boll weevil, 

 Anthonomus grand Is Boheman; bollworm, Hcliothis zea (Boddie) ; and the cotton 

 aphid. Aphis gossypii Glover. The insecticidal spray programs resulted in 

 effective control of boll weevil and bollworm during each of the 3 years. 

 Significant differences in boil weevil square infestation caused by the 

 different treatments of nitrogen were obtained only 1 year. Significant 

 I differences in bollworm damage to bolls did not occur among treatments with 



I nitrogen during any of the 3 years. Although there was an indication that 



i 



( more aphids occurred on leaves as the rate of nitrogen was increased, significant 



f 



' differences among treatments were obtained only 1 year. The effects of nitrogen 



J 



{ sidedress applications on the yield of seed cotton per acre were inconsistent. 



I 



i 



I 44. , and Tippins, H. H. 1966. Status of boll weevil resistance in relation 



I to changing insecticide control program, 1960-65. J. Ga. Entomol. Soc. 



I 1: 1-4. 



Boll weevil, Anthonomus grand is Boheman. susceptibility to endrin and methyl 



\ 



H 



