Should we respray? Or reapply pest oil? Ants are still on the tree. Leaves are yellowy.
17 September 2020 02:04 PM
Dead scale will remain on the tree for some time - if it brushes off easily/is powdery, it's dead, otherwise re-spray. Consider Nature's Way Citrus & Ornamental Spray which also controls ants, to break the cycle:
To rectify general yellowing, fertilise now with a citrus food, if you haven't already done so for spring: