Above: Royal palm bugs and fecal spotting in unopened frond.
Find publication here: https://blogs.ifas.ufl.edu/collierco/files/2018/03/Royal_Palm_Bug_mgmt_Caldwell__Ali_FSHS_proceedings1.pdf
Damage by the royal palm bug is most severe in spring and early summer. The populations then apparently subside until the following spring
Royal palm bug damage (red arrows).
Counting insects in the spear leaf from a bucket truck.
This study was conducted to evaluate the efficacy of soil-applied neonicotinoid systemic insecticides. All three active ingredients were tested at 0.05 oz a.i. (1.4 g) per inch trunk diameter. All of the treatments tested: Merit 2F (imidacloprid), Safari 2G and Safari 20 SG (dinotefuran), and Arena 50 WDG (clothianidin) provided excellent RPB control at 30 and 75 days after treatment. The fairly rapid uptake of neonic insecticides documented in this study provides better pest management flexibility. Treatment can wait (depending on the local aesthetic threshold) until slight damage is observed. This allows treatment of only infested palms. Previously, because it was believed the insecticide (imidacloprid) movement was slow (months), it was common to treat every palm with a soil drench before an infestation was confirmed.