The pest is promoted by dry-warm weather and, in case of a strong occurrence, may reduce the leaf volume so that the tuber yields are seriously affected.
Potato beetle [Leptinotarsa decemlineata]
The larvae are about 15 mm long, have a reddish color, and a row of black dots on each side. The highly domed abdomen is thickened but narrows again towards the back (Picture 1). The beetles are about 10 mm long and have yellow wing cases with black striations (Picture 2).
On potatoes, and also on other plants of the nightshade family, e.g. tomatoes and black nightshade.
Pattern of damage
The leaves exhibit leaf edge bites and pitting (beetle and larvae). In case of a severe infestation,larvae can eat the leaves bare up to the leaf veins and stem (Picture 3). Also typical are the orange-colored eggs which are deposited on the underside of the leaf in packs of about 10-30 eggs (Picture 4).