What highly noticeable, sawdust-like physical sign is left behind by the caterpillars?
Answer
Frass
A key indicator of infestation is frass, which appears as small, green or brown, sawdust-like pellets on the foliage or ground beneath the plant.
Related Questions
In which geographical area is the box tree moth considered a manageable, native part of the ecosystem?What phenomenon largely explains the rapid, unchecked population expansion of the box tree moth upon its introduction to Europe?What is the exclusive food source for the box tree moth caterpillars?Which specific sign indicates the presence of older, larger box tree moth caterpillars?How does the availability of host plants differ fundamentally between Europe and North America regarding this pest?To what extremely low temperature can overwintering box tree moth larvae survive while in diapause?What percentage of adult box tree moths exhibit the darker, melanic color phase?Which regulatory action is specifically mentioned as a method to slow the moth's spread between major population centers in North America?How is the long-distance presence of the moth in a new, distant North American county often correlated?What highly noticeable, sawdust-like physical sign is left behind by the caterpillars?