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Keyword: Acorn |
Overview - a b c d e f g h i j k l m n o p q r s t u v w x y z |
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The acorn weevil reaches body lengths of 4 - 9 mm. Its colouration varies from reddish-brown to yellowish-brown. The head of the beetle is extended by a long proboscis and is as long as the female body and only slightly shorter than the male’s. Due to its app...
...es body lengths of 4 - 9 mm. Its colouration varies from reddish-brown to yellowish-brown. The head of the beetle is extended by a long proboscis and is as long as the female body and only slightly shorter than the male’s. Due to its appearance, the acorn weevil can be confused with a related species, the hazelnut weevil (Curculio nucum). They can be differentiated by their body size: the acorn weevil is slightly smaller, and by the size of the probe beam - in the hazelnut weevil it is twice as long as wide, while in the acorn weevil the length is three times the width. | | |
| | Acorn weevil | The acorn weevil (Curculio venosus) is a species belonging to the genus Curculio (Curculio glandium), in the order beetles (Coleoptera), the suborder Polyphaga, the infraorder Cucujiformia, the superfamily snout beetles (Curculionidea), the family true weevil...
...lio glandium), in the order beetles (Coleoptera), the suborder Polyphaga, the infraorder Cucujiformia, the superfamily snout beetles (Curculionidea), the family true weevils (Curculionidae), the subfamily Curculioniae and the tribe Curculionini. The acorn weevil is widespread in the northern hemisphere (Europe and Asia) where oak trees grow (hardwood zone). It is found with varying frequency and is rare in Northern Europe. | | |
| | | Acorn weevil live everywhere in the distribution area of the oak and are found from May to August come in deciduous forests, parks, or sometimes in gardens. After mating, the fertilized females look for an unripe acorn hanging on a tree, which they pierce with their long proboscis. When they have penetrated deep enough into the core, they lay 1, 2 or sometimes more eggs. As the acorn grows and matures the hole closes from the outside. Approximately 2 weeks later, the beetle larvae hatch from the eggs.
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| Acorn weevil larvae are 9 - 10 mm long. Their bodies are yellowish-white in colour and without legs. The head is reddish-brown and lacks eyes. The larvae eat out the core of the acorn. In autumn, when the damaged acorns fall from the tree, the larvae, which have now reached their full size, bore their way out and dig into the ground, where they settle themselves in small chambers about 250 mm beneath the surface of the ground for the purpose of overwintering. In t...
...to the ground, where they settle themselves in small chambers about 250 mm beneath the surface of the ground for the purpose of overwintering. In the following spring, the larvae pupate in their chambers. They leave the pupae in May or June as adult acorn weevils. | | |
| | |  | | Weevils - Snout Beetle - Acorn weevil - shows his wings | | >> Picture |
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