Appearance
The larvae of the species is white or light gray coloured with black dots.''Chrysomela populi'' can reach a length of about 9–13 mm. The female is slightly larger than the male. These beetles show a black, dark blue or dark green body, that is round and ladybird-like. Head and pronotum are black, while elytra is bright red, with a black stain at the base. Some beetles come as orange coloured.It can be distinguished from ''Chrysolina grossa'' by its shorter antennae and less estensive pronotum. It is also rather similar to ''Chrysomela saliceti'' and ''Chrysomela tremulae''.
Naming
*''Chrysomela populi populi'' Linnaeus, 1758⤷ ''Chrysomela populi asiatica'' Jakob, 1952
⤷ ''Chrysomela populi nigricolli''s Jakob, 1952
⤷ ''Chrysomela populi kitaica'' Jakob, 1952
⤷ ''Chrysomela populi violaceicollis'' Bechyne, 1954
Distribution
This species is one of the most widespread and frequent species of leaf beetles from the subfamily Chrysomelinae. These beetles can be found in most of Europe , in the Palearctic ecozone and in the Oriental ecozone .
Behavior
Adults can be found from April to October. Females lay eggs in Spring, in small, irregular clusters of up to 20-30 eggs. This species has 2 to 3 generations per year. Larvae of the last generation overwinter in the litter under the leaves. Both the larvae and the beetles live and feed on young leaves of various plants of the Salicaceae species, especially ''Populus'' and ''willow'' species. Adults may emit a red, highly-smelling, repellent liquid, obtained from the salicylic acid contained in their food plants.
Habitat
These beetles mainly inhabit coniferous, mixed and broad-leaved forests, forest fringes and dry meadows with poplars and willow trees.
Reproduction
The larvae of the species is white or light gray coloured with black dots.References:
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