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Guignardia citricarpa (citrus black spot) Black spot has been present in Australia, South Africa and parts of Asia for many years (Kotze, 2000). Most of the losses in Australia and South...
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Gymnosporangium asiaticum (Japanese pear rust) The rust is a serious pathogen of Pyrus pyrifolia in the Far East. It is also, in its telial stage, one of the most important and widely...
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Gymnosporangium juniperi-virginianae (cedar apple rust) The rust causes a serious disease on apples in North America, and is much the most important of the North American Gymnosporangium species...
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Gymnosporangium yamadae (Japanese apple rust) G. yamadae belongs to the Uredinales, which includes the rust fungi, all of which cause diseases on plants. At present, G....
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Gymnostoma sumatranum (sumatran ru) G. sumatranum is an evergreen tree which can reach 35 m tall and a diameter at breast height of 75 cm. The crown is conical in young trees, and...
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Gypsonoma aceriana (poplar twig borer) G. aceriana is widespread in poplar nurseries and plantations in many regions of Europe. In 1998 and 1999, non-target captures of single specimens...
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Haematonectria haematococca (dry rot of potato) Culture colony growth in vitro is moderately rapid, covering an agar slope in 4-6 days with a somewhat sparse, floccose, greyish-white...
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Haematoxylum campechianum (logwood) H. campechianum is a shrub or small tree widely grown commercially for its wood, that has become naturalized and invasive in many...
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Hakea drupacea (sweet hakea) The main factors contributing to the success of H. drupacea as an invader in South Africa are the high seed longevity in the canopy and efficient...
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Hakea gibbosa (rock hakea) The factors contributing to the success of H. gibbosa as an invader in South Africa are its copious seed production, high seed longevity in the...
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