Abstract
The Diaspididae (Hemiptera: Coccomorpha), also known as armoured scale insects, is a diverse family of obligate, phytophagous parasites that include major economic pests of terrestrial plants. There are over 2,700 diaspidid species, about 116 of which have been recorded worldwide feeding on species and hybrids of citrus. Citrus is widely cultivated in the Lao People’s Democratic Republic (Lao PDR) and has been promoted by the country’s government as a poverty alleviation crop. However, little is known about the pest and disease issues faced by farmers of this crop. To help address this, in 2018 we conducted surveys of diaspidids on citrus in southern Lao PDR and found 14 species infesting citrus growing in orchards and home gardens. Identifications were based on morphological features of adult females and 28S, COI and COII DNA sequences. An identification key to the species based on morphological characters is provided. Records of diaspidid species on citrus in Myanmar, Thailand and Cambodia are updated, and records from Peninsular Malaysia provided. The first record on citrus of a Pseudaulacaspis species in Indochina is reported from Việt Nam, and an undescribed species of Pseudaonidia is recorded on citrus in Lao PDR.
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