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Pergidae
The Pergidae are a moderate-sized family of sawflies occurring in the Western Hemisphere and the Australasian Region. The Pergidae are, with almost 450 described species, the third-largest family of Symphyta after the Tenthredinidae and the Argidae. Morphologically, most pergids are typically sawfly-like, but the form of the antennae varies considerably in number of segments and from simple to serrate and pectinate or even bipectinate. Sexual dimorphism is common and reflected in differences in type of antennae, colour, and size. Included are some of the few known apterous sawflies, those of the genus '' Cladomacra'' occurring in Papua New Guinea and Indonesia, and a species with brachypterous females, '' Clarissa tasbates'', in Tasmania. Distribution Most Pergidae species occur in South America and Australia. They are the dominant family in Australia and are one of the major families in the Neotropics. Of the 14 subfamilies, three (Pergulinae, Philomastiginae, and Perreyiinae) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heteroperreyia Hubrichi
''Heteroperreyia hubrichi'' is a South American sawfly that feeds on plants of the genus '' Schinus''. Role in biological control Brazilian pepper trees (''Schinus)'' are trees native to South America, whose ornamental introduction lead to a process of biological invasion in more than 20 countries. In US states of Florida and Hawaii, the introduction of the sawfly ''H. hubrichi'' was proposed as a controlling mechanism against the Brazilian pepper tree's dispersion, due to the high host specificity it shows. In Florida, host-specificity tests with commercially valuable and native/endangered tree species were conducted and were positive, so a request to the technical advisory group on the Introduction of Biological Control Agents of Weeds about the introduction was approved, however, as ''H. hubrichi'' is known to produce cytotoxic peptides as do other pergid sawflies, concern about cattle intoxication probably stopped it. Results in Hawaii showed potential risk to endangered ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eucalyptus
''Eucalyptus'' () is a genus of over seven hundred species of flowering trees, shrubs or mallees in the myrtle family, Myrtaceae. Along with several other genera in the tribe Eucalypteae, including '' Corymbia'', they are commonly known as eucalypts. Plants in the genus ''Eucalyptus'' have bark that is either smooth, fibrous, hard or stringy, leaves with oil glands, and sepals and petals that are fused to form a "cap" or operculum over the stamens. The fruit is a woody capsule commonly referred to as a "gumnut". Most species of ''Eucalyptus'' are native to Australia, and every state and territory has representative species. About three-quarters of Australian forests are eucalypt forests. Wildfire is a feature of the Australian landscape and many eucalypt species are adapted to fire, and resprout after fire or have seeds which survive fire. A few species are native to islands north of Australia and a smaller number are only found outside the continent. Eucalypts have been grow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
