Species: Dysmicoccus grassii (Leonardi) - Catalog

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Common name: None

Field Characters: Field characters not recorded. Based on characteristics of slide-mounted adult female, with body oval; legs yellow; body covered by white mealy secretion; ovisac ventral only; 17 pairs of thin wax filaments around perimeter of body. Present on stems and leaves of host. Probably oviparous.

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Habitus photo
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Validation characters: Numerous ventral oral collars laterad of front coxae; dorsal setae shorter than conical cerarian setae, stiff; discoidal pore near eye present or absent; ventral multiloculars on segments IV - VIII; 2 conical setae in each abdominal cerarius; translucent pores on hind femur and tibia.

Comparison: Dysmicoccus grassii is similar to D. orchidum by having short, stiff dorsal setae and 2 conical setae in cerarii. Dysmicoccus orchidum differs by lacking ventral oral collars laterad of front coxa; having translucent pores on hind coxa, trochanter, femur, and tibia; having ventral multilocular pores restricted to posterior 2 abdominal segements. This species also is similar to D. mackenziei but differs by having 2 conical setae in cerarii anterior of anal-lobe pair (D. mackenziei had more than 2).

U.S. quarantine notes: This species is most commonly intercepted from tropical or subtropical new world localities on a wide diversity of hosts especially coffee and cocoa. Until recently, it was identified as Dysmicoccus alazon Williams, but D. grassii is a much older name. Several species of Dysmicoccus other than D. brevipes, D. boninsis, D. grassii, D. neobrevipes, and Dysmicoccus sp. nr. bispinosus have been taken in quarantine including: D. finitimus Williams (southern Asia), D. hambletoni Williams and Granara de Willink (Ecuador), D. lansii Williams (Philippines), D. lepelleyi (Betrem)(southern Asia), D. mackenziei Beardsley (Central America and Mexico on bromeliads), D. orchidum Williams (southern Asia on orchids), D. probrevipes (Morrison)(Central and South America); D. viatorius Williams (Philippines).

References: WilliaWa1988a; Willia2004; WilliaGr1992.

All references mentioning: Dysmicoccus grassii

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