Blue willow beetle | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | Insecta |
Order: | Coleoptera |
Infraorder: | Cucujiformia |
Family: | Chrysomelidae |
Genus: | Phratora |
Species: | P. vulgatissima |
Binomial name | |
Phratora vulgatissima | |
The blue willow beetle (Phratora vulgatissima), formerly Phyllodecta vulgatissima, is a herbivourous beetle of the family Chrysomelidae. It is dark with a metallic sheen that ranges from a blue color to bronze. It is distinguished from P. vitellinae by the latter more commonly displaying bronze coloration. European Phratora species can be distinguished based on morphology of female genitalia. [1] The larvae undergo three instar stages from hatching to pupation. [2] This beetle is found throughout Europe and Scandinavia, [3] and occurs in China. [4]
The blue willow beetle is found on willow (Salix) species, whose leaves contain low levels of salicylates [5] [6] in fens, carrs and on river banks, but also often in willow short rotation coppice and other agricultural landscapes. [7] It often aggregates on host plants. [8] On Salix cinerea , it prefers and is more common on female than male trees despite higher egg predation exerted by the common flowerbug Anthocoris nemorum on female trees. [9] It is univoltine in Sweden [2] but can produce multiple generations per year in other parts of its distribution range. [10] Proliferation of larvae and egg production varies with vegetation. [11] It overwinters under lichens on trees and under tree bark. [12] Predators of blue willow beetle eggs include A. nemorum and Orthotylus marginalis . Larval predators include A. nemorum, the bug Rhacognathus punctatus , [10] a syrphid fly (possibly Parasyrphus nigritarsis ) [13] and the wasp Symmorphus bifasciatus . [14] Adult beetles are parasitized by the wasp Perilitus brevicollis [15] and consumed by R. punctatus. [13]
In Europe, the blue willow beetle can become a severe herbivore pest on willows. [16] For plantations of common osier (Salix viminalis), herbivory reducing biomass production by up to 40% has been estimated. [17] It is susceptible to Bacillus thuringiensis tenebrionis and also Spinosad when treatment is applied to affected plants. [18]
The insects of the beetle family Chrysomelidae are commonly known as leaf beetles, and include over 37,000 species in more than 2,500 genera, making up one of the largest and most commonly encountered of all beetle families. Numerous subfamilies are recognized, but the precise taxonomy and systematics are likely to change with ongoing research.
Salix viminalis, the basket willow, common osier or osier, is a species of willow native to Europe, Western Asia, and the Himalayas.
Salicin is an alcoholic β-glucoside. Salicin is produced in willow (Salix) bark. It is a biosynthetic precursor to salicylaldehyde.
The Chrysomelinae are a subfamily of leaf beetles (Chrysomelidae), commonly known as broad-bodied leaf beetles or broad-shouldered leaf beetles. It includes some 3,000 species around the world.
Short rotation coppice (SRC) is coppice grown as an energy crop. This woody solid biomass can be used in applications such as district heating, electric power generating stations, alone or in combination with other fuels. Currently, the leading countries in area planted for energy generation are Sweden and the UK.
The leaf beetle Chrysomela lapponica is found in central and northern Europe feeding on leaves of willows and birch. The adult beetles are about 8 mm long and beetles in different regions can have different colour patterns on their elytra.
Clytra laeviuscula, the ant bag beetle, is a species of short-horned leaf beetles belonging to the family Chrysomelidae, subfamily Cryptocephalinae.
Parasyrphus nigritarsis is a species of hoverfly, from the family Syrphidae, in the order Diptera. It is known from northern Europe and North America, and has been considered to be a rare species in parts of its range. Adults visit flowers as a source of nutrition, and females lay their eggs on clutches of eggs of leaf beetles. When the Parasyrphus larvae hatch, they first consume leaf beetle eggs and then consume immature beetles until they reach the pupal stage. This species is related to hoverflies that prey on aphids as larvae, and has been investigated in studies of chemical ecology and food web ecology.
Perilitus brevicollis is a species of parasitoid wasp in the family Braconidae. The host of this wasp is the blue willow beetle, which is a pest in Europe.
Phratora is a genus of leaf beetles. It is synonymous to Phyllodecta . European Phratora species can be distinguished based on morphology of female genitalia., but they differ little in size and body form and most show metallic coloration.
Phratora vitellinae, the brassy leaf beetle, formerly Phyllodecta vitellinae, is a beetle of the family Chrysomelidae found in Europe and Asia. It feeds on Populus and Salix species. The evolution of its host plant preferences and the mechanism by which it uses host plant chemicals to make a larval defensive secretion have been the subject of intense study by research groups in Europe and the Nordic countries.
Phratora laticollis is a species of leaf beetle found in Europe and Asia. This beetle is found on Populus species and the chemistry and production of its larval defensive secretions and host plant relationships have been studied extensively.
Melampsora amygdalinae is a fungal pathogen and part of the division Basidiomycota. It is known as a rust fungus that is host specific. M. amygdalinae commonly infects willows of the genus Salix. This fungus was first discovered in 1909 by Heinrich Klebahn who was a professor of soil biology in Hamburg. Neimi at el. explain how the pathogen occurs throughout the whole distribution of the host, and the small natural populations are an area of interest. This rust fungus is annual and autoecious, which references the fungus spending its entire life in a single host.
Phratora americana is a species of leaf beetle in the family Chrysomelidae. It is found in North America.This species is known from Ontario, Quebec, and high elevations in the eastern United States of America. It feeds on willow species and varies in color from purple to blue or blue-green.
Chrysomela aeneicollis is a species of leaf beetle in the family Chrysomelidae. This organism has been used as a model for studies of natural selection in nature. It is currently being investigated to study effects of environmental change on insect populations, and the evolutionary significance of variation at genes affecting metabolism and the response to stress. It has been included as a study species in the California Conservation Genomics Project, due to its presence in multiple California ecoregions and extensive knowledge of genetic variation, evolutionary ecology, and interactions with other species. Information about its range and comparisons with closely related species can be found in a review of the genus Chrysomela published in the Canadian Entomologist.
Phratora interstitialis is a species of leaf beetle in the family Chrysomelidae. It is found in Europe and Northern Asia and North America. This leaf beetle feeds on host plants that are poor in salicylates and is closely related to the European Phratora vulgatissima, which also feeds on salicylate-poor willows.
Phratora purpurea, the aspen skeletonizer, is a species of leaf beetle in the family Chrysomelidae. It is found across North America, including Maryland, New York, Ontario, British Columbia, and the Northwest Territories. It feeds on willows and poplars, and is deep purple or coppery red in color.
Phratora frosti is a species of leaf beetle in the family Chrysomelidae. This species is known from Nova Scotia to Alberta. It feeds on willow species and varies in color from blue to purple to coppery, with pale legs.
Phratora tibialis is a species of leaf beetle found in Europe and parts of Asia. This beetle is found on willows and the chemistry and production of its larval defensive secretions and host plant relationships have been studied extensively.
Phratora polaris is a species of leaf beetle found in the Nordic regions of Europe., occasionally in Scotland, and Iceland. Some authors have recorded it in central Europe, especially in the Alps. Historically, this species has occurred in Greenland. This beetle is found on willow (Salix) species in the southern part of its range. Populations in Lapland feed on birch.