Zeuzera pyrina

Distinguished from other Cossidae by the distinctive white wings with dense black spotting arranged in rows along the veins. The six black spots on the white furry thorax are diagnostic. Males have broader, more feathery antennae than females. The combination of spotted forewings and translucent hindwings (except anal area) separates this species from superficially similar noctuids or other wood moths. Larval tunnels are extensive, reaching up to 50 cm in length, with coarse frass ejected from entrance holes.

Woodland, gardens, and orchards. Strongly associated with areas containing suitable host trees, particularly fruit tree orchards and olive groves. In Egypt, found in both old cultivated orchards and newly reclaimed agricultural lands.

Native to Europe (excluding Ireland), northern Africa (Algeria, Egypt, Libya, Morocco, Tunisia), and Asia (Afghanistan, Cyprus, India, Iran, Iraq, Israel, Japan, Jordan, Korea, Lebanon, Saudi Arabia, Sri Lanka, Syria, Taiwan, Turkey). Introduced to northeastern United States prior to 1879; established in Maine, Pennsylvania, Tennessee, and Texas.

Adults fly from June to September, with timing varying by location. In Egypt, pupal emergence occurs from late May to late July, with adult emergence from mid-June to early August. Larval activity continues year-round within host wood, with peak fungal infection of larvae occurring in winter months (December–February).

Larvae feed internally on the wood of various deciduous trees and shrubs. Recorded hosts include apple (Malus domestica), pear (Pyrus communis), cherry (Prunus avium), plum (Prunus domestica), olive (Olea europaea), walnut (Juglans regia), fig (Ficus), willow (Salix), poplar (Populus), and other stone fruit and ornamental trees.

• Malus domestica - larval hostapple; significant orchard pest
• Pyrus communis - larval hostpear
• Prunus avium - larval hostcherry
• Prunus domestica - larval hostplum
• Olea europaea - larval hostolive; particularly susceptible, trees can be killed by larval boring
• Juglans regia - larval hostwalnut; infestation rates up to 16% documented
• Ficus - larval hostfig
• Salix - larval hostwillow
• Populus - larval hostpoplar
• Beauveria bassiana - pathogenentomopathogenic fungus; causes natural epizootics with seasonal prevalence
• Steinernema carpocapsae - pathogenentomopathogenic nematode; high biocontrol potential
• Heterorhabditis indica - pathogenentomopathogenic nematode
• Elachertus nigritulus - parasitoidparasitic wasp used in biological control

Eggs laid on bark of susceptible trees. Larvae bore into wood and feed internally for two to three years, creating extensive tunnels up to 50 cm long, before emerging to pupate under bark. Pupation occurs under bark; adults emerge and fly during summer months. Larval development includes at least six instars based on nematode reproduction studies.

Larvae exhibit highly adaptable feeding behavior, infesting both healthy and weakened trees. Extensive wood-boring creates galleries that disrupt water and nutrient transport, causing wilting, reduced growth, and tree mortality. Adults are nocturnal. Larvae demonstrate high adaptive capacity to chemical control measures, complicating management efforts.

As a primary wood-borer, larvae physically alter host tree structure and function, creating entry points for secondary pathogens and pests. Weakened trees become more susceptible to other diseases. Serves as host for diverse natural enemies including parasitoid wasps, predatory insects, spiders, nematodes, and entomopathogenic fungi, contributing to food web complexity in orchard and woodland ecosystems.

Major pest of fruit tree cultivation worldwide. Causes significant economic damage through larval tunneling, with documented tree death rates of 17.83% in apple orchards. Management relies on integrated approaches: monitoring with delta traps, pruning infested branches, biological control using parasitoids and entomopathogens, and judicious chemical application. Subject of research for biocontrol development using entomopathogenic nematodes and fungi.

• Zeuzera biebingeriTreated as subspecies Z. pyrina biebingeri by some sources, but mostly treated as valid species; distinction requires taxonomic expertise
• Other CossidaeDistinguished by diagnostic spotted wing pattern and thoracic markings; most other cossids lack distinct spotted forewings with rows of spots along veins

• pest
• wood-borer
• orchard pest
• xylophagous
• invasive
• biocontrol target

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Zeuzera pyrina . [Distribution map].
• Zeuzera pyrina: the threatening leopard moth damaging fruit trees
• Seasonal prevalence and histopathology of Beauveria bassiana infecting larvae of the leopard moth, Zeuzera pyrina L. (Lepidoptera: Cossidae)
• REARING FRUIT BORERS ON NATURAL HOSTS AND ARTIFICIAL MEDIUM DIETS: 1-ZEUZERA PYRINA L. (LEPIDOPTERA: COSSIDAE)
• Biocontrol potential of four native entomopathogenic nematodes against Zeuzera pyrina L.(Lepidoptera: Cossidae) in the Willow trees (Salix spp.)
• Natural Host Rearing and some Biological Aspects of the Leopard Moth Zeuzera pyrina L. (Lepidoptera: Cossidae) on Poplar Trees (Populus Sp.) (Malpighiales salicaceae) in Egypt
• Spatio-temporal distribution and mass-trapping of leopard moth, Zeuzera pyrina in walnut orchards
• Synergistic Bioconversion of Date Palm Leaves Into Ruminant Feed by a Leopard Moth (Zeuzera pyrina L.) Gut Bacterial Consortium and Nutrient Stimulators.