white scale on sago palms
Palm has white scale on leaves. How to rid and control?
White Asian scale is a major problem on sago palm. This article has more information. You may need to try a variety of insecticides and control measures. https://www.gardeningknowhow.com/ornamental/trees/sago-palm/white-spots-on-sago.htm
It might be helpful if you consult with some experts in your area, they might know of the most effective treatment in your area. These would be at the county extension service; This link will help you find the nearest office: