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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.).
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.
These minute insects, colloquially known as hoppers, are plant feeders that suck plant sap from grass, shrubs, or trees. Their hind legs are modified for jumping, and are covered with hairs that facilitate the spreading of a secretion over their bodies that acts as a water repellent and carrier of pheromones . [ 1 ]
This small (3.7–5 mm) beetle is similar in size and shape to other species of Phratora.Willow-feeding adults are typically metallic blue or green, but birch feeding populations are metallic dark brown [14] Larvae are dark to black and pupae are pale.
The blue willow beetle is found on willow 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]
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]
The insects were found in the United States for the first time in 2002. They were first discovered in Texas in 2016 in Harrison County near Caddo Lake. They are in 24 Texas counties, including ...
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.