Platynota idaeusalis

The broad wingspan range (12–25 mm) reflects sexual size dimorphism, with females at the upper end and males at the lower end. As a tortricid moth, it can be distinguished from similar taxa by genitalia examination or molecular methods; external morphology alone may not reliably separate it from congeners without expert analysis.

Adults have a wingspan of 12–25 mm. The species exhibits sexual dimorphism in size, with females typically larger than males. As a member of Tortricidae, adults likely display the characteristic bell-shaped wing posture at rest typical of leafroller moths, though specific coloration and pattern details are not provided in available sources.

Eastern North America, with strong association with apple orchards in the mid-Atlantic USA. Found in diverse environments supporting its host plant range, from natural vegetation to cultivated agricultural settings.

Eastern North America, from Ontario south to Florida and west to Oklahoma. Also recorded in the Pacific Northwest region of North America. Canadian provincial records include Alberta, Manitoba, and Saskatchewan.

Adults are active from June to July in northern portions of the range. Multiple generations occur per year throughout its distribution.

Larvae feed on a diverse range of host plants. The species is a significant direct pest of apples (Malus spp.) in the mid-Atlantic USA. Specific larval host plant records beyond apple are not detailed in available sources.

• apple - pestsignificant direct pest in mid-Atlantic USA orchards
• diverse host plants - larval food plantgeneral statement from literature; specific plants not enumerated

Multiple generations per year. Specific details of egg, larval, and pupal stages are not provided in available sources. Larval stage is the damaging phase, feeding on host plant tissues.

Adults are nocturnal and attracted to ultraviolet light sources. Larvae are leaf-feeding and associated with rolling or tying plant tissues, consistent with Tortricidae common name 'leafroller moths'. Specific behavioral details beyond flight period and generation number are not documented in available sources.

Herbivore and agricultural pest. Serves as host for baculoviruses (Platynota idaeusalis nucleopolyhedrovirus and granulovirus), which have been investigated for biological control potential. Subject of parasitism by solitary wasps including Monobia quadridens, which provisions nests with paralyzed caterpillars of this and related species.

Significant economic pest of apple production in the mid-Atlantic USA. Subject of insecticide resistance research; populations have demonstrated resistance to azinphosmethyl through elevated monooxygenase, esterase, and glutathione transferase activity. Investigated as a target for viral biocontrol agents.

• Platynota stultanaAlso in genus Platynota, known as the omnivorous leafroller moth; both species are tortricid pests with overlapping geographic ranges and similar larval habits
• Other TortricidaeMany tortricid moths share similar size ranges, wing shape, and larval leaf-rolling behaviors; definitive identification requires genitalia dissection or molecular analysis

• agricultural pest
• apple pest
• baculovirus host
• insecticide resistance
• leafroller moth
• multiple generations
• nocturnal
• tortricid

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
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