Garden tiger moth

Taxonomic position: The garden tiger moth (Arctia caja) belongs to the order Lepidoptera and the family Erebidae (subfamily Arctiinae). It is a well-known moth species widely distributed across the temperate regions of Europe, Asia, and North America.

Biology and life cycle: Typically, this species completes one generation per year. Larvae overwinter in a state of diapause under leaf litter or plant debris. In the spring, they emerge to feed on fresh foliage, growing rapidly before pupating in silken cocoons. The adults emerge in summer to mate and lay eggs on various host plants.

Host plants: The garden tiger moth is a polyphagous pest, meaning its larvae feed on a vast range of plant species. Common hosts include fruit trees such as apple and pear, berry bushes like raspberries, and numerous herbaceous plants, including various vegetables and ornamental garden flowers.

Damage symptoms and harmfulness: The larvae cause damage by consuming leaves. Young larvae skeletonize the foliage, while older larvae can consume entire leaves, leaving only the primary veins. Heavy infestations lead to significant defoliation, which reduces the photosynthetic capacity of the plants and affects their overall health and yield.

Control measures: Management of the garden tiger moth involves an integrated approach to reduce population levels:

• Removal and destruction of plant debris to eliminate overwintering sites.
• Manual removal of larvae in small-scale garden environments.
• Application of biological control agents, such as Bacillus thuringiensis, during the early larval stages.
• Use of insecticides labeled for Lepidopteran pests when damage exceeds economic thresholds.