Technical Abstract: Species of scale insects are very diverse and attack a wide range of host plants. On pecan, various scale species can be found on limbs throughout the canopy and also on trunks. However, it is the obscure scale (Melanaspis obscura) that can cause problems when undetected populations increase. Chemical control of primary pecan pests can reduce natural enemy populations and lead to damaging levels of obscure scale in orchards. Well-timed control measures against the vulnerable crawler stage are effective against the univoltine pest. In addition, dormant oil sprays (2% oil) applied to runoff are necessary for management of scales with oil. It is important that the scale be entirely covered with the dormant oil as death is not by contact but rather by suffocation. Application volumes suitable for control of pecan weevil with contact insecticides are too low for control of scale insects with dormant oil.