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Adult and larval leaf beetles feed on all sorts of plant tissue. Many are serious pests of cultivated plants, for example the Colorado potato beetle ( Leptinotarsa decemlineata ), the asparagus beetle ( Crioceris asparagi ), the cereal leaf beetle ( Oulema melanopus ), the mustard beetle ( Phaedon cochleariae ) and various flea beetles , and a ...
The alder leaf beetle is a relatively small beetle, around 6–7 mm, black or metallic blue in colour. The winged adults overwinter and emerge in the spring. There is one generation each year. The larvae are normally black. Although the damage to alder trees can be unsightly, the trees will usually tolerate the damage. [5] [8]
Binomial name. Phratora laticollis. (Suffrian, 1851) Phratora laticollis is a species of leaf beetle found in Europe and Asia. [1][2] This beetle is found on Populus species [3] and the chemistry and production of its larval defensive secretions and host plant relationships have been studied extensively. [4][5]
Phratora tibialis is a species of leaf beetle found in Europe and parts of Asia. [2] [3] This beetle is found on willows (Salix species) [4] [5] [6] and the chemistry and production of its larval defensive secretions and host plant relationships have been studied extensively. [5] [7] [8] [9]
Some ladybird beetles, including Calvia quindecimguttata and Oenopia conglobata consume leaf beetle larvae, while other aphid specializing ladybirds do not consume them. [39] [49] [50] The larval secretion of P. vitellinae contains salicylaldehyde, an irritating volatile compound that was shown to repel ants in the laboratory. [9]
Life history. One generation of this beetle is produced a year. Adults feed before winter and spend most of their overwintering time in protected areas such as wind rows, crop stubble, and tree bark crevices. [1][2][3] Adults mate once the temperature warms to above 9–10 degrees Celsius (or 44.6 degrees F) [1][4] and females have a relatively ...
The scarlet lily beetle, red lily beetle, or lily leaf beetle (Lilioceris lilii), is a leaf beetle that eats the leaves, stem, buds, and flowers, of lilies, fritillaries and other members of the family Liliaceae. It lays its eggs most often on Lilium and Fritillaria species. In the absence of Lilium and Fritillaria species, there are fewer eggs ...
Chrysochus auratus, more commonly known as the dogbane beetle, is a leaf beetle primarily found in the eastern United States. The beetle is approximately 8 to 11 mm in length, and possesses an oblong and convex shape. This beetle has two pairs of wings, one of which is a pair of copper colored elytra. The beetle is typically found to have a ...