Fig. 2

The wood borer P. fastuosa infestation to T. arjuna plantations according to plant age (< 4 years; 4–8 years; > 8 years) and year of attack (2017; 2018; 2019). Pest infestation varied significantly with plant age (χ2(2,27) = 23.14286, p < 0.05) (indicated by letters' a’, 'b', and ‘c’ according to the Dunn test). Pest infestation in particular aged plants does not vary significantly from year to year (indicated by the same letters; < 4 years: ‘c’, ‘c’, ‘c’; 4–8 years: ‘a’, ‘a’, ‘a’; > 8 years: ‘b’, ‘b’, ‘b’)