Biology and harmfulness of Unaspis euonymi (Comstock) in the area of Belgrade [Serbia]
2007
Graora, D., Poljoprivredni fakultet, Beograd - Zemun (Serbia)
Unaspis euonymi (Comstock) (Homoptera: Diaspididae) is a very dangerous pest of Euonymus spp. Numerous scale colonies and a high level of plant infestation provoke drying of leaves, branches and whole plants. As a result these plants have been less and less used in urban environment in the last few years. The biology and harmfulness of Unaspis euonymi were studied on Euonymus plant, in several locations in the territory of Belgrade (Serbia) during 2004 and 2005. The species has three generations and overwinters as mature female on trunks and branches of Euonymus. Due to a prolonged oviposition period, the generations are overlapping so that all developmental stages are continually present on plants. The level of infestation was examined on three plant species, Euonymus japonica, Euonymus europea and Euonymus fortunei, and Euonymus japonica was the most frequently attacked plant was.
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