Pebble prominent

The pebble prominent (Notodonta ziczac) is a moth species belonging to the family Notodontidae within the order Lepidoptera. This insect is primarily known as a defoliator that affects deciduous trees, particularly those growing in moist environments or riverine forests.

The larvae, commonly known as caterpillars, feed mainly on trees from the Salicaceae family. Poplar (Populus) and willow (Salix) are the primary hosts, though the insect can occasionally be found on aspen. It is particularly problematic in forestry nurseries where young saplings can be severely defoliated.

The life cycle involves one or two generations per year, depending on the geographic region and climate. The insect overwinters as a pupa within a tough silken cocoon situated in the soil. Adults emerge in spring, with females laying eggs in small clusters on the underside of host leaves.

The damage caused is primarily due to leaf consumption. Young larvae skeletonize the foliage, while older, larger caterpillars consume entire leaves, leaving only the midribs and larger veins. Severe infestations can result in total defoliation, stressing the host tree and reducing its seasonal growth.

Integrated pest management strategies include:

• Regular inspection of host trees during the larval stage.
• Hand-picking and destruction of egg clusters in small-scale plantings.
• Application of Bacillus thuringiensis based bio-insecticides during early instar stages.
• Using systemic or contact insecticides when population densities exceed economic thresholds in commercial plantations.