Insecticidal Management of Lygus and Relative Boll Damage in the Texas High Plains

Carbine at 2.3 oz, Ammo at 5.1 fl-oz, Orthene 97 at 0.75 lbs, Vydate at 17 fl-oz, Centric at 2.5 oz and Diamond at 10.5 fl-oz were evaluated for their efficacy to Lygus in late-season cotton in Hockley County.  Diamond and Carbine, as expected since they are an IGR and anti-feedent respectively, were somewhat slow acting, but by 6 DAT (days after treatment) the total number of Lygus were statistically equivalent and lower than the untreated for all the insecticides.  However, the Centric plots had more adults than the other insecticides except Diamond.  At 6 DAT, the untreated plots were averaging about 48% bolls with external Lygus feeding damage, and about 30% bolls with internal feeding damage.  All of the insecticides had fewer external feeding marks than the check.  External feeding damage was similar among the insecticides except Centric had more damage than Ammo.  Results were similar for the percentage of bolls with internal damage, but Centric did not differ from the check.