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Nematus oligospilus, commonly known as the willow sawfly, is a species of sawfly in the family Tenthredinidae. Native to central and northern Europe and Asia, it was first recorded in South America in the 1980s and New Zealand in 1997, and has also been introduced to Australia, South Africa and Lesotho.
Chrysomela vigintipunctata, or the spotted willow leaf beetle, is a species of broad-shouldered leaf beetle belonging to the family Chrysomelidae, subfamily Chrysomelinae. The length of the beetles varies from 6.5 to 9.2 mm. Both larvae and adults feed on the leaves of its host plants, especially Salicaceae species.
Adults feed on leaves and pollen of willow and poplar trees, especially Salix fragilis ('crack willow'). [ 2 ] [ 3 ] It is predated by the shieldbug Zicrona caerulea , several ladybird species and the larva of a hoverfly ( Parasyrphus sp.).
In the Kola Peninsula of north-west Russia, outbreaks of Chrysomela lapponica resulted in severe defoliation of the willow species Salix borealis in August 1993 and then again in 1994 and 1995. Studies showed that plants stressed by defoliation the previous year were less favourable for the development of the leaf beetles.
Cassidinae larvae may be leaf miners (many of the former Hispinae), stem borers (e.g. Estigmena) and external leaf feeders (e.g. Leptispa, Oediopalpa). [9] Chrysomelinae generally feed on leaves as adults and larvae, though some species feed on flowers instead. [10] Criocerinae larvae are usually leaf miners or feed externally on leaves. [9]
Like other Phratora species, P vitellinae adults overwinter under bark, within fissures of bark of trees found near summer host plants, or in leaf litter. [ 2 ] [ 5 ] In spring, after 8–10 months overwintering, adults disperse to host plants and consume new foliage for about a week before mating, [ 5 ] and in another week they lay their eggs ...
The family Phylliidae (often misspelled Phyllidae) contains the extant true leaf insects or walking leaves, which include some of the most remarkably camouflaged leaf mimics (mimesis) in the entire animal kingdom. They occur from South Asia through Southeast Asia to Australia. Earlier sources treat Phylliidae as a much larger taxon, containing ...
Salix alba, the white willow, is a species of willow native to Europe and western and central Asia. [2] [3] The name derives from the white tone to the undersides of the leaves. It is a medium to large deciduous tree growing up to 10–30 m tall, with a