Viticulture-pest
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Daktulosphaira
grape phylloxera
Daktulosphaira is a genus of phylloxerid insects within Hemiptera, containing the economically devastating grape phylloxera D. vitifoliae. Members are small, aphid-like insects that induce distinctive galls on grapevines (Vitis spp.) and are obligate specialists on this host genus. The genus is notable for extremely high transcriptional plasticity when transferred between host genotypes, with over one-third of expressed genes showing differential expression. D. vitifoliae exhibits both root-feeding and leaf-galling forms, with complex life cycles involving parthenogenetic and sexual reproduction. The genus is native to eastern North America but has become a global pest of commercial viticulture.