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Four species of mealybugs, Dysmicoccus neobrevipes, Phenacoccus defectus, Ph. parvus, and Ph. solenopsis (Hemiptera: Coccoidea: Pseudococcidae) are recorded for the first time from Japan in the Ryûkyû (Ryukyu) Archipelago, with brief biological notes. We discuss some features of these species compared with those of related species, D. brevipes and Ph. solani, and we consider their potential risks...
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