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Common name

Nakahara mealybug

Field characters

Body oval; probably with 17 pairs of conspicuous lateral filaments, posterior pairs longest; probably producing an ovisac that covers posterior abdomen. On roots of cactus host.

Validation characters

Dorsal multiloculars and oral-collar tubular ducts present on posterior abdominal segments; translucent pores restricted to hind tibia; discoidal pores associated with eye; oral-rim tubular ducts scattered over dorsum, usually restricted to thorax on venter; oral collar tubular ducts present laterad of anterior spiracle; multiloculars present on segments III-VIII on venter, with a few on thorax; circulus large, divided by intersegmental line; antennae 8-segmented.


Pseudococcus nakaharai is similar to Pseudococcus viburni by having discoidals near the eye; hind tibiae swollen with many translucent pores; several oral collars laterad of anterior spiracle; 1 or no oral collars laterad of midcoxa. Pseudococcus nakaharai can be distinguished (characters of P. viburni are in parentheses) by having oral collars on dorsum (absent); multilocular pores on dorsum (absent); and translucent pores on hind tibia only (femur and tibia).

U.S. quarantine notes

This species was intercepted at U. S. ports-of-entry 12 times between 1995 and 2012, with specimens originating from Mexico and Peru. We also have examined specimens taken in quarantine from Guatemala (Nyctocereus); Mexico (Anhalonium, Ariocarpus, Carnegiea, Cephalocereus, Cereus, Ferrocactus, Foqueria, Grusonia, Leuchtenbergia, Lophophora, Mammillaria, Myrillocactus, Neomammillaria, Pilocereus, Thelocactus, Wilcoxia); Peru (cactus, Cereus, Pygmaeocereus). ScaleNet lists hosts in 4 plant families. It is most commonly collected and intercepted on cactus. ScaleNet distribution records for P. nakaharai include Mexico and The United States of America (California, District of Columbia, Florida, Texas), in the Nearctic zoogeographic region, besides Guatemala in the Neotropics and Japan in the Palaearctic region. Several species of Pseudococcus other than P. aurantiacus Williams, P. baliteus Lit, P. calceolariae (Maskell), P. comstocki (Kuwana), P. cryptus Hempel , P. dendrobiorum, P. elisae Borchsenius, P. jackbeardsleyi Gimpel & Miller, P. landoi (Balachowsky), P. longispinus (Targioni Tozzetti), P. lycopodii Beardsley, P. maritimus (Ehrhorn), P. microcirculus McKenzie, P. nakaharai Gimpel & Miller, P. odermatti Miller & Williams, P. philippinicus Williams, P. pithecellobii Gimpel & Miller, P. soleneydos Miller & Gimpel and P. viburni (Signoret) have been taken at U. S. ports-of-entry including: P. agavis MacGregor (Mexico, on Agave); P. apodemus Williams (The Philippines, on Fortunella and Mangifera); P. apomicrocirculus Gimpel and Miller (Mexico, on orchids); P. apoplanus Williams (India, on orchids); P. chenopodii Williams (Australia, on Brunia); P. concavocerarii James (Somalia, on Euphorbia); P. donrileyi Gimpel and Miller (Mexico, on Citrus; Puerto Rico, on Melicoccus); P. eucalypticus Williams (Australia, on Eucalyptus and Chamelaucium); P. gilbertensis Beardsley (Guam, on Dracaena; The Philippines, on Citrus); P. importatus McKenzie (Australia, Brazil, Britain, Canada, Colombia, Costa Rica, Guatemala, Jamaica, Madagascar, Mexico, Panama, Paraguay, Peru, The Philippines, South Africa, Trinidad, and Venezuela, on orchids); P. neomaritimus Beardsley (Mexico, on Citrus, Psidium, and Punica); P. neomicrocirculus Gimpel and Miller (Costa Rica, Guatemala and Venezuela, on orchids); P. orchidicola Takahashi (Kwajalein, Marshall, Samoa, and Tonga, on Alocasia, Dendrobium and Pandanus); P. peregrinabundus Borchsenius (Ecuador, on Musa); P. saccharicola Takahashi (Vietnam, on Saccharum); P. sociabilis (Brazil, on Annona, Cattleya, Carica, Hedera, Hippeastrum, Dahlia, Oncidium, Solanum and Zygopetalum); and P. solomonensis Williams (Micronesia and Palau, on Musa and Piper).

Important references


All references mentioned

Pseudococcus nakaharai