Citricola scale population is higher this season
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