

"-n 



221 



Spiders, which were not further classified, did not appear to be too adversely 

 affected by this spray program. Although the immediate effect of the control 

 operations was of great importance, the most critical concern in this large 

 scale program was the impact of the pesticide applications upon the populations 

 of beneficial insects in the cotton fields during the following growing season. 

 The results of this study show that there were no overall adverse effects of 

 the use of these very late season applications of ULV Malathion on the beneficial 

 insect populations in the following year. Due to the large areas covered and 

 the lack of available personnel, it was impossible to critically evaluate the 

 factors responsible for maintaining early and mid-season beneficial insect 

 population at or above levels found in untreated areas. 



426. ; Ashdown, D.; and Hills, T. M. 1967. Spring population trends of 

 non-target insects following the third year of the High Plains Boll 

 Weevil Control Program. Tex. Tech. Coll. Entomol. Rep. 67-2 (Suppl.), 

 10 pp. 

 The 1966 High Plains Boll Weevil Control Program appears to have had no major 

 long term negative effects on the populations of beneficial insects present 

 in the spring and early summer of 1967. In previous studies there were noted 

 population increases in the spray zone above the caprock and population de- 

 creases in the spray zone below the caprock; however, the 1967 data Indicate 

 that there was also an apparent over-recovery of beneficial insects in non- 

 cultivated areas below the caprock. Further studies should be conducted to 

 revaluate the long range effects on non-target beneficial organisms, and the 

 possibility of using such tools as out-of-season insecticide applications to 

 reduce the need of in-season control practices. 



