Studies to monitor cotton aphid, Aphis gossypii Glover, populations in conservation tillage production were conducted at the LSU Agricultural Center's Macon Ridge Research Station located near Winnsboro, Louisiana during the six year period, 1994-1999. Tillage treatments that were used in these studies included conventional and reduced tillage (+ winter wheat cover crop) systems. Cotton aphid populations were monitored weekly from one week after cotton seedling emergence to crop termination by sampling ten whole plants or plant terminals (all apical shoot growth above and including the first fully expanded leaf) from each plot.