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Hydrilla (waterthyme) is a genus of aquatic plant, usually treated as containing just one species, Hydrilla verticillata, though some botanists divide it into several species. It is native to the cool and warm waters of the Old World in Asia, Africa and Australia, with a sparse, scattered distribution; in Australia from Northern Territory ...
It is known as the Asian hydrilla leaf-mining fly. It is used as an agent of biological pest control against the noxious aquatic plant hydrilla (Hydrilla verticillata). The adult fly is about 1.5 millimeters long, dark gray in color with a shiny metallic gold or silver face. The female lays eggs on the leaves of hydrilla above the surface of ...
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[1] [2] [3] The non-native invasive species Hydrilla is the only known host plant for this beetle, with larvae feeding on and developing within Hydrilla stems. [ 4 ] References
This species is native to temperate North America. It has been naturalised in Europe since 1939 and in Japan since the 1960s. [7] The first European record of Elodea nuttallii was probably 1914 in England, though it had been identified wrongly as Hydrilla verticillata, [8] with correct identification as Elodea nuttallii occurring in 1974.
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Hydrocharitaceae is a flowering plant family including 16 known genera with a total of ca 135 known species (Christenhusz & Byng 2016 [2]), that including a number of species of aquatic plant, for instance the tape-grasses, the well known Canadian waterweed, and frogbit.
In these the pollen floats on the surface and reaches the stigmas of the female flowers as in Hydrilla, Callitriche, Ruppia, Zostera, Elodea. In Vallisneria the male flowers become detached and float on the surface of the water; the anthers are thus brought in contact with the stigmas of the female flowers. [1]