Bonide Systemic Insect Control is not specifically labeled for cycad scale. We would recommend treating with Safari. Please refer to the product label for mixing and application instructions.
The label states:
Mixing Instructions for Roses, Flowers, Ornamentals, Shrubs & Shade Trees
Aphids & Grasshoppers: 2 Tbs (1 fl oz) per gallon of water
Japanese Beetles: 4 Tbs (2 fl oz) per gallon of water
Other Listed Insects Commonly Found on Ornamental Plants: 3 Tbs (1 1/2 fl oz) per gallon
Spray entire plant covering both sides of foliage thorougly.
Please let us know if you have any other questions.