Coccinelle migrante - Migrant ladybug
La Coccinelle asiatique (Harmonia axyridis) est une espèce de coccinelles aphidiphages (qui se nourrit de pucerons), originaire de Chine. Dès le début du xxe siècle, mais surtout plus massivement vers la fin des années 1980, elle a été importée en Europe et aux États-Unis pour la lutte biologique. Son comportement, sa prolificité et sa voracité en font désormais une espèce envahissante nuisible pour les coccinelles autochtones qu'elle tend à éliminer.
Cette coccinelle présente une large gamme de coloris, allant du rouge à points noirs au noir à points rouges, en passant par de nombreuses nuances de jaune. Les élytres sont ornés de zéro à 19 points.
Ces coléoptères peuvent être difficiles à identifier en raison de leurs variations de couleur, de la taille des taches et du nombre de taches sur les élytres. La façon la plus facile d'identifier H. axyridis f. succinea est de regarder le pronotum et de voir si les marques noires ressemblent à une lettre « W » ou « M ».
Harmonia axyridis is a large lady beetle or ladybird species that is most commonly known as the harlequin, Asian, or multicoloured Asian lady beetle. This is one of the most variable lady beetle species in the world, with an exceptionally wide range of colour forms. It is native to eastern Asia, and has been artificially introduced to North America and Europe to control aphids and scale insects. It is now common, well known, and spreading in those regions, and has also established in Africa and widely across South America. This species is conspicuous in North America, where it may locally be known as the Halloween beetle, as it often invades homes during October to overwinter. Other names include multivariate, southern, Japanese, and pumpkin ladybird.
The common color form, f. "succinea", is orange or red in colouration with 0–22 black spots of variable size. The other usual forms, f. "conspicua" and f. "spectabilis", are uniformly black with, respectively, two or four red markings. The pronotum is white with variable black patterning, ranging from a few black spots in an M formation to almost entirely black. The underside is dark with a wide reddish-brown border. Numerous other forms have also been recorded. Extreme forms may be entirely black, or feature complex patterns of black, orange and red. Color polymorphism is likely hereditary but might depend on the location and time of year in which the pupae are exposed to different temperatures. Darker color variations are more common in Asia than in North America.
From Wikipedia, the free encyclopedia
_5D45301
Coccinelle migrante - Migrant ladybug
La Coccinelle asiatique (Harmonia axyridis) est une espèce de coccinelles aphidiphages (qui se nourrit de pucerons), originaire de Chine. Dès le début du xxe siècle, mais surtout plus massivement vers la fin des années 1980, elle a été importée en Europe et aux États-Unis pour la lutte biologique. Son comportement, sa prolificité et sa voracité en font désormais une espèce envahissante nuisible pour les coccinelles autochtones qu'elle tend à éliminer.
Cette coccinelle présente une large gamme de coloris, allant du rouge à points noirs au noir à points rouges, en passant par de nombreuses nuances de jaune. Les élytres sont ornés de zéro à 19 points.
Ces coléoptères peuvent être difficiles à identifier en raison de leurs variations de couleur, de la taille des taches et du nombre de taches sur les élytres. La façon la plus facile d'identifier H. axyridis f. succinea est de regarder le pronotum et de voir si les marques noires ressemblent à une lettre « W » ou « M ».
Harmonia axyridis is a large lady beetle or ladybird species that is most commonly known as the harlequin, Asian, or multicoloured Asian lady beetle. This is one of the most variable lady beetle species in the world, with an exceptionally wide range of colour forms. It is native to eastern Asia, and has been artificially introduced to North America and Europe to control aphids and scale insects. It is now common, well known, and spreading in those regions, and has also established in Africa and widely across South America. This species is conspicuous in North America, where it may locally be known as the Halloween beetle, as it often invades homes during October to overwinter. Other names include multivariate, southern, Japanese, and pumpkin ladybird.
The common color form, f. "succinea", is orange or red in colouration with 0–22 black spots of variable size. The other usual forms, f. "conspicua" and f. "spectabilis", are uniformly black with, respectively, two or four red markings. The pronotum is white with variable black patterning, ranging from a few black spots in an M formation to almost entirely black. The underside is dark with a wide reddish-brown border. Numerous other forms have also been recorded. Extreme forms may be entirely black, or feature complex patterns of black, orange and red. Color polymorphism is likely hereditary but might depend on the location and time of year in which the pupae are exposed to different temperatures. Darker color variations are more common in Asia than in North America.
From Wikipedia, the free encyclopedia
_5D45301