Tuberolachnus salignus (Gmelin, 1790) (Hemiptera, Aphididae) on Apple (Malus domestica Borkh) in Kashmir, India

Abstract

This study reports the first occurrence of the invasive pest Tuberolachnus salignus (Gmelin, 1790), commonly known as the giant willow aphid, on apple (Malus domestica Borkh.) in Kashmir, India. Previously known to infest willows (Salix spp.) and poplars (Populus spp.), this record expands its host range to include a commercially important fruit crop. Live observations of winged adult aphids and apterae on the stems of apple trees are accompanied by detailed taxonomic descriptions, morphological features, and photographic documentation to facilitate identification. The pest’s biology, distribution, and ecological adaptability are also discussed, shedding light on its potential and possible impact on apple orchards in temperate regions. Given the invasive nature of this species and its ability to exploit new hosts, the findings emphasize the need for extensive field surveys throughout the Kashmir Valley and other parts of the Northwestern Himalayas. Such surveys will help determine the pest’s prevalence, host-selection behaviour, and seasonal biology in this new environment. Understanding these factors is critical to developing targeted and sustainable pest management strategies to mitigate the potential economic damage to apple cultivation.