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Spherical Mealybug

Scientific Name
Nipaecoccus viridis
Scientific Author
(Newstead)
Taxonomy
(Hemiptera: Pseudococcidae)
Pest Status
0 Unknown
Status
0 NZ - Unknown
Reliability
High
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Diagnostic Notes
Description from Williams & Watson (1988)

A broadly oval species. with moderately produced anal lobes without ventral sclerotisation. Antennae each normally with 7 segments. Legs well developed but slender and short compared with size of body. Labium almost as long as clypeolabral shield. Circulus round to oval. Ostioles represented by poorly-developed posterior pair only, each with a few trilocular pores on each lip and only an occasional seta. Cerarii numbering at most 8 pairs, present on abdomen only, each with 2 enlarged conical to lanceolate setae; on anal lobes these set close together accompanied by a small group of trilocular pores on an indistinct sclerotised area: anteriorly cerarian setae progressively smaller and wider apart without discernible trilocular pores. Dorsal setae of various sizes but all lanceolate, not numerous, some on abdomen almost same size as cerarian setae, present in distinct rows, but more scattered on thorax and head. Ventral setae normal and flagellate. Trilocular pores evenly distributed on dorsum sparser on venter. Multilocular disc pores on venter present across anterior and posterior edges of abdominal segments, a few on median areas of thorax and in varying numbers around margins as far forward as prothorax. Oral collar tubular ducts present in rows on dorsum and on ventral abdominal segments, grading into 2 sizes around ventral margins in a deep zone with the marginal multilocular disc pores.

Biology

On citrus it infests twigs, shoots, leaves, flower buds and fruit. The mealybug colonises on the host's branches, twigs, shoots, leaves, flower buds and fruits, and feed on roots. From these parts, the mealybug sucks up the plant sap, causing curling and dwarfing of the terminal growth, abortion of flowers, and yellowing of leaves and dropping of fruits (Sharaf & Meyerdirk, 1987). Mean longevity of adult males is 81.3 ± 2.5 h. The estimated duration of the sexually active phase of the adult male within life span varied between mealybug species. Among the seven tested species, Ps. longispinus displayed the shortest period (34.4 h) and N. viridis the longest one (46.6 h).There is a sexual maturation period of the adult males which was indicated by maximum growth of waxy caudal filaments. (Mendel, et al., 2012)

Structure

Colour photograph given by Kawai (1980).

Systematics

Tinsley (1900: 65) erroneously synonymized Dactylopius vastator Maskell with Dactylopius filamentosus Cockerell.

Economic Importance & Control

Nipaecoccus viridis is widespread throughout the tropics and subtropics, attacking numerous plant species and often causing considerable damage (Clausen, 1978; Sharaf & Meyerdirk, 1987). Biology and pest status on coffee presented by Le Pelley (1968).

Associates

HYMENOPTERA Formicidae: Camponotus compressus Fabr., Crematogaster sp., Meranoplus sp., Myrmicaria brunnea Sanders, Oecophylla smaragdina Fabr., Technomyrmex albipes Smith, Tetraponera rufonigra Jerdon.

Foes

COLEOPTERA Coccinellidae: Chilocorus haematocephalus Sicard, Cryptolaemus montrouzieri Mulsant, Exochomus nigripennis Er., Hyperaspip maindroni Sicard, Hyperaspis pumila Mulsant, Nephus, Nephus bipunctatus Kug., Nephus regularis Sic., Nephus roepki Fluiter, Scymnus, Scymnus fuscatus Boh., Scymnus near subvillosus Gze., Scymnus syriacus Mars., Scymnus (Pullus) coccidivora, Stethorus ? punctillum Weise.

Nitidulidae: Cybocephalus.

DIPTERA Cecicomyidae: Diadiplosis coccidivora (Felt).

Cecidomyiidae: Diadiplosis koebelei Koebele, Dicrodiplosis, Dicrodiplosis manihoti Harris, Dicrodiplosis near pseudococci Felt, Dicrodiplosis pseudococci Felt.

Drosophilidae: Cacoxenus, Cacoxenus (Gitonides) multidentatus Tsacas & Chassagnard, Gitona perspicax, Leucopis (Indoleucopis) luteicornis Malloch.

HYMENOPTERA Aphelinidae: Coccophagus, Coccophagus cowperi Girault, Coccophagus perthispidis Girau
More Information
Specimen Contact
New Zealand Arthropod Collection
Author
Rhode, B.E. & Crosby, T.K.
Created
04/07/2013 07:47 AEST
Last Updated
15/04/2014 01:49 AEST
Citation
Rhode, B.E. & Crosby, T.K. (2013) Spherical Mealybug (Nipaecoccus viridis) Updated on 4/15/2014 1:49:05 AM Available online: PaDIL - http://www.padil.gov.au.
Image Use
Free for use under the Creative Commons Attribution 3.0 Australia License

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