Parthenolecanium corni, commonly known as the European fruit lecanium or brown scale, is a soft scale insect that poses a significant threat to a variety of woody plants, including grapevines, stone fruits, and ornamental trees.
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hemiptera
Family: Coccidae (Soft Scales)
Genus: Parthenolecanium
Species: Parthenolecanium corni
Synonyms: Lecanium corni Bouché, 1844; Eulecanium corni
P. corni is polyphagous, affecting over 60 host genera across 36 plant families. Common hosts include:
Ceanothus
Cotoneaster
Cytisus
Weigela
Wisteria
Roses
Plums
Bush and cane fruits
Grapevines, peaches, and nectarines in glasshouses
Adult Females: Oval to hemispherical, approximately 3–5 mm in diameter. Color ranges from brown to reddish-brown, often with a glossy appearance. The body is typically smooth, lacking prominent ridges. Mature females are immobile and remain attached to the host plant.
Nymphs (Crawlers): The first instar nymphs are tiny, mobile, and yellow to pale brown. They disperse to new feeding sites before settling down.
Honeydew Production: The scale feeds on plant sap, excreting honeydew, which can lead to the growth of sooty mold on plant surfaces.
Plant Stress: Heavy infestations can cause yellowing of leaves, reduced growth, and overall plant decline.
Aesthetic Impact: Sooty mold growth can reduce photosynthesis and detract from the plant's appearance.
Chemical Control: Apply horticultural oils or insecticidal soaps to affected areas. It's essential to spray during the crawler stage for effective control.
Biological Control: Introduce natural predators like ladybugs or parasitic wasps.
Cultural Practices: Maintain plant health through proper watering and fertilization to enhance resistance.
Monitoring: Regularly inspect plants for signs of scale infestation.
| Parthenolecanium corni |
Parthenolecanium corni, commonly known as the European fruit lecanium or brown scale, is a soft scale insect that poses a significant threat to a variety of woody plants, including grapevines, stone fruits, and ornamental trees.
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hemiptera
Family: Coccidae (Soft Scales)
Genus: Parthenolecanium
Species: Parthenolecanium corni
Synonyms: Lecanium corni Bouché, 1844; Eulecanium corni
P. corni is polyphagous, affecting over 60 host genera across 36 plant families. Common hosts include:
Ceanothus
Cotoneaster
Cytisus
Weigela
Wisteria
Roses
Plums
Bush and cane fruits
Grapevines, peaches, and nectarines in glasshouses
Adult Females: Oval to hemispherical, approximately 3–5 mm in diameter. Color ranges from brown to reddish-brown, often with a glossy appearance. The body is typically smooth, lacking prominent ridges. Mature females are immobile and remain attached to the host plant.
Nymphs (Crawlers): The first instar nymphs are tiny, mobile, and yellow to pale brown. They disperse to new feeding sites before settling down.
Honeydew Production: The scale feeds on plant sap, excreting honeydew, which can lead to the growth of sooty mold on plant surfaces.
Plant Stress: Heavy infestations can cause yellowing of leaves, reduced growth, and overall plant decline.
Aesthetic Impact: Sooty mold growth can reduce photosynthesis and detract from the plant's appearance.
Chemical Control: Apply horticultural oils or insecticidal soaps to affected areas. It's essential to spray during the crawler stage for effective control.
Biological Control: Introduce natural predators like ladybugs or parasitic wasps.
Cultural Practices: Maintain plant health through proper watering and fertilization to enhance resistance.
Monitoring: Regularly inspect plants for signs of scale infestation.
