Chrysomela scripta

Adult beetles 6.5–9 mm long ^[1] . Elytra yellow with black irregularly rounded or elongated spots, with a black line along the seam of the elytra and a reddish lateral border of the elytra. The pronotum is black and, like the elytra, has a reddish wide border with a small black dot ^[2] .

Mature larva blackish, 12 mm long. It has two white tubercles with black horn-shaped processes on the sides of the body. Larvae have odorous glands located on their sides on all body segments except protothorax and the last two abdominal segments. Being disturbed, the larva emits a sharp repelling odor ^[3] .

The larva pupates clinging to the leaf. Pupa of black color ^[4] .

Found in North America wherever willows and poplars grow ( deltoid poplar ) ^[1] . They feed on the leaves of these trees, sometimes causing severe damage to the foliage of individual trees ^[2] .

Yellowish or reddish ^[2] eggs are laid in groups of 15–75 ^[5] pieces on the back of willow or poplar leaves. The appeared larvae feed on the areas between the thick veins of leaves, while the adults feed, on the contrary, thick veins ^[1] . Beetles fall into suspended animation in fallen foliage near fodder plants ^[6] or their bark exfoliated ^[3] .

In the laboratory , pathogenic bacteria for this species ( Bacillus thuringiensis var. San diego ) and microsporidia ( Nosema scripta ) were detected , although infected beetles were not observed in the natural environment ^[7] .