| Polydrusus formosus | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Coleoptera |
| Family: | Curculionidae |
| Genus: | Polydrusus |
| Species: | P. formosus |
| Binomial name | |
| Polydrusus formosus (Mayer, 1779) | |
| Synonyms | |
| |
Polydrusus formosus the green immigrant leaf weevil, [1] is a species of broad-nosed weevil belonging to the family Curculionidae, subfamily Entiminae. [2] [3]
This beetle is present in most of Europe and in the Nearctic realm. [4]
The adults grow up to 5–6 millimetres (0.20–0.24 in) long. The colour of this insect is brilliant metallic green, as the black body is coated in emerald round scales. If the scales wear off the body beneath appears dark. Antennae are pale with a dark club. These beetles show a short groove between the eyes and evident striae on the elytra. [5]
Adults can mostly be encountered from April through August. [5] These beetles lay their eggs in the bark or leaves of the host-plants. The soil-inhabiting larvae grow up to 7 millimetres (0.28 in) long feeding on juicy plant roots. In Autumn their development is complete. They overwinter and pupate in Spring.
The adults are eaters of young leaves and open blossoms of a wide variety of woodland trees and shrubs ( Corylus avellana , Quercus species, etc.), but also fruit trees (apple, pear, cherry, etc.) They are considered a pest of fruit trees, causing extensive damages to their buds, blossoms and shoots. [6] [7]
The Curculionidae are a family of weevils, commonly called snout beetles or true weevils. They are one of the largest animal families, with 6,800 genera and 83,000 species described worldwide. They are the sister group to the family Brentidae.
The palm weevil Rhynchophorus ferrugineus is one of two species of snout beetle known as the red palm weevil, Asian palm weevil or sago palm weevil. The adult beetles are relatively large, ranging between 2 and 4 centimetres long, and are usually a rusty red colour—but many colour variants exist and have often been classified as different species. Weevil larvae can excavate holes in the trunks of palm trees up to 1 metre (3.3 ft) long, thereby weakening and eventually killing the host plant. As a result, the weevil is considered a major pest in palm plantations, including the coconut palm, date palm and oil palm.
Anthonomus eugenii is known as the pepper weevil. This beetle feeds and lays eggs on plants in the genus Capsicum and a few species in the genus Solanum. A. eugenii is native to Mexico, however, it is an important pest of Capsicum in Florida, Puerto Rico, and Central America.
Aades is a genus of beetles in the family Curculionidae, commonly known as weevils. These insects are found in various parts of the world, including North and South America, Asia, and Europe. They are generally small in size, with most species measuring between 2 and 7 millimeters in length.
Phyllobius glaucus is a species of weevil found across Europe, especially in carrs. It is a pest of a variety of fruit trees, but has little economic effect. It was first described by Giovanni Antonio Scopoli in 1763.
Oxyops vitiosa is a species of weevil in the family Curculionidae. Common names include the melaleuca leaf weevil and the melaleuca snout beetle. It feeds on the leaves and shoots of the broad-leaved paper bark tree, Melaleuca quinquenervia, which is endemic to Australia where it grows on seasonally inundated plains and swampland, and was introduced into Florida in order to help drain flooded portions of the Everglades.
Coccus viridis is a soft scale insect in the family Coccidae with a wide host range. It is commonly known as green scale or sometimes coffee green scale because it is a major pest of coffee crops throughout the world.
Phyllobius arborator is a species of broad-nosed weevils belonging to the family Curculionidae, subfamily Entiminae.
Gonipterus gibberus is a species of weevil in the family Curculionidae. It is commonly known as the eucalyptus snout beetle, the eucalyptus weevil or the gum tree weevil. It feeds and breeds on Eucalyptus trees and is endemic to Australia.
Gonipterus scutellatus is a species of weevil in the family Curculionidae. It is commonly known as the eucalyptus snout beetle, the eucalyptus weevil or the gum tree weevil. It feeds and breeds on Eucalyptus trees and is endemic to Australia.
Phyllobius pyri, the common leaf weevil, is a species of broad-nosed weevil belonging to the family Curculionidae subfamily Entiminae.
Apoderus coryli, common name hazel-leaf roller weevil, is a species of leaf-rolling beetles belonging to the family Attelabidae subfamily Attelabinae. Because of the trunk-like elongated head, it is often mistakenly attributed to the weevils.
Polydrusus impar is a species of weevils belonging to the family Curculionidae.
Xylosandrus compactus is a species of ambrosia beetle. Common names for this beetle include black twig borer, black coffee borer, black coffee twig borer and tea stem borer. The adult beetle is dark brown or black and inconspicuous; it bores into a twig of a host plant and lays its eggs, and the larvae create further tunnels through the plant tissues. These beetles are agricultural pests that damage the shoots of such crops as coffee, tea, cocoa and avocado.
Phyllobius argentatus is a species of short-nosed weevil commonly known as the silver-green leaf weevil.
Phyllobius pomaceus is a species of short-nosed weevil commonly known as the nettle weevil.
Trichobaris trinotata, commonly known as the "Potato stalk borer", is a species of weevil in the family Curculionidae. It is found in North America where it is a pest of potato plants, the larvae tunnelling inside their stems.
Hypomeces pulviger, also known as the gold-dust weevil or green weevil, is a species of beetle in the true weevil family. The adult weevil can reach a length of about 14 mm (0.6 in) and is covered with iridescent green or yellowish-green dust-like scales all over the body. This species can be found in India, tropical Southeast Asia, and the Philippines. Both the larvae and adults are crop pests. The larvae live in and pupate in the soil, feeding on living plant roots. The adult weevils are long-lived, doing damage to foliage, and sometimes defoliating young bushes and nursery trees.
Myllocerus viridanus, often known as sweet potato beetle, pod borer or ash weevil, is a species of weevil native to India and Sri Lanka.
Odoiporus longicollis, commonly known as banana stem weevil or banana pseudostem borer, is a species of weevil found in South Asia and South East Asia.