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Macrodactylus subspinosus! by madlynx Macrodactylus subspinosus! by madlynx
Scarabée du rosier

Nom commun: scarabée du rosier
Nom scientifique: Macrodactylus subspinosus
Nom anglais: Rose chafer

Le scarabée du rosier est un coléoptère au corps allongé, de couleur beige olivâtre, doté de longues pattes orangées. Les adultes mesurent de 9 à 13 mm et ils émergent de la fin du mois de mai et au début de juin. Ils commencent immédiatement à s’alimenter en groupe sur le feuillage, les boutons floraux et les fruits en développement. Les femelles choisissent généralement un sol sablonneux où poussent des mauvaises herbes pour y déposer leurs oeufs.

Les larves apparaissent vers la fin du mois de juillet. Elles sont blanchâtres et portent de longues pattes. Leur corps a la forme d’un «C». Elles se nourrissent des racines des plantes herbacées. Elles traversent l’hiver en s’enfonçant profondément dans le sol. Vers la fin du mois de mai, elles migrent vers la surface où elles se transforment en nymphes, puis en adultes. Le scarabée du rosier n’a qu’une seule génération par année.

Hôtes préférés

Le scarabée du rosier peut s’attaquer à un grand nombre de plantes ornementales: rosiers, lilas japonais, hydrangées, sorbiers, vigne vierge, lierre de Boston et vignes à raisin, ronces, pivoines, potentilles, iris, ormes, chênes, bouleaux, aubépines, spirée, sureaux, pins.

Dommages

• En se nourrissant, les adultes perforent le feuillage, les boutons floraux et les fruits en formation.

• Lorsque les adultes sont très nombreux, les feuilles et les fleurs peuvent être entièrement dévorées. Les dommages sont souvent rapides et spectaculaires, et s’apparentent à ceux du scarabée japonais.

Rose chafer 

Macrodactylus subspinosus is a North American beetle of the family Scarabaeidae. It is one of at least two beetles in this family known as the "rose chafer", the other being the European Cetonia aurata. M. subspinosus occurs from Eastern Canada to Colorado and is considered a pest of many crops and flowers. It is given its common name of rose chafer because it eats the leaves of roses, although it also feeds on many other plants

The rose chafer has a yellowish-tan coloured body that is about 8–13 millimetres (0.3–0.5 in) in length, with wings that do not completely cover the abdomen.[3] The beetle has six long, spiny, reddish-brown legs that gradually become darker towards the end of the appendage. It has two short lamellate antennae that end in a club of flat plates and it has chewing mouthparts. Rose chafers are covered in dull yellow hairs which give the body its characteristic colour, however with age and with normal activity the hairs are worn off the head and thorax revealing a black colour. It is thus possible to distinguish between older and younger beetles, as older beetles will have fewer hairs and thus be darker in colour. Females tend to lose more hairs, especially on the thorax due to the mating process, and can also appear darker in colour. Females also tend to be more robust than the male. The eggs of the rose chafer are about 1 mm in length and are oval, white and shiny. The larvae are white C-shaped grubs that when mature develop a brown head capsule and three distinct pairs of legs. The pupae are yellowish-brown in colour and are about 15 mm in length.

:icondonotplz::iconusemyartplz:
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:iconmonstermakerno3:
MonsterMakerNo3 Featured By Owner Oct 4, 2016   General Artist

Down in Mexico we call them ‘Pipioles’
Long time ago, like 20 years they appeared in the wet station, the 'Nguarmusha', it used to be so many that filed the backdoor gardens, and they get attached to you as walk by,
Now i barely see one or two wen it rains. I miss the little fellows.

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:iconmadlynx:
madlynx Featured By Owner Oct 5, 2016   Photographer

Thanks for taking all the time and trouble for your thoughtful comment! :-) 

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:iconvwaccine:
vwaccine Featured By Owner Jun 29, 2015
Nice, but isn't it "mature content" ;)
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:iconmadlynx:
madlynx Featured By Owner Jun 29, 2015   Photographer
Love Bugs!!!  ;-)  
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:iconprincessekitcat:
PrincesseKitCat Featured By Owner Jun 27, 2015  Student General Artist
Magnifique prise :wow:
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:iconalembic-lynx:
Alembic-Lynx Featured By Owner Jun 25, 2015  Professional Photographer
Sub and DOM, even in the insect world wonderful macro photograph
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Details

Submitted on
June 25, 2015
Image Size
5.5 MB
Resolution
2066×2066
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Camera Data

Make
NIKON CORPORATION
Model
NIKON D5200
Shutter Speed
1/640 second
Aperture
F/10.0
Focal Length
85 mm
ISO Speed
500
Date Taken
Jun 22, 2015, 10:29:41 AM
Software
Adobe Photoshop CS4 Windows
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