In 2024, there has been an increasing report of significant numbers of citricola scale in the San Joaquin Valley. Damage thresholds are low for citricola scale, 1 adult scale/twig or 0.5 1st instar/leaf.  Because this pest produces a large number of eggs (1000/female), populations can build up quickly under right weather conditions. Cooler and wetter weather conditions in April/May meant higher egg hatch and nymph survival increasing the infestation in 2024 season.

•Citricola scale trial, 2013;  Citricola scale trial 2014 •Citricola scale trial, 2015; Citricola scale trial, 2016 •Citricola scale trial, 2017; Citricola scale trial 2018 •Citricola scale trial, 2019 ; Citricola scale trial 2023