Valid Names Results

Heliococcus summervillei Brookes, 1978 (Pseudococcidae: Heliococcus)

Nomenclatural History

Heliococcus summervillei Brookes 1978: 241. Type data: Holotype: AUSTRALIA: Queensland, on Paspalum dilatatum, and paratype females, PAKISTAN: Peshawar, on Saccharum officinarum. Holotype, female, Type depository: Canberra: Australian National Insect Collection, CSIRO Entomology, Australia; accepted valid name Illustr.
Novonilacoccus oryzae Ghosh & Ghose 1987: 5. Type data: INDIA: West Bengal, Kalyani, on Oryza sativa. Holotype, female, Type depository: Kalyani: Department of Agricultural Entomology, Bihan Chandra Krishi Viswavidyalaya, West Bengal, India; junior synonym (discovered by Willia2004a, 349). Illustr.

Common Names

old pasture mealybug PowellMiLa2026a

Ecological Associates

Hosts:

Families: 2 | Genera: 15

Cyperaceae

Eleocharis | BrinonMaCh2004

Poaceae

Axonopus compressus | BrinonMaCh2004 | (= Paspalum compressum)
Brachiaria decumbens | MilleHeCa2016
Brachiaria ruziziensis | BrinonMaCh2004
Chloris gayana | BrinonMaCh2004 | ssp. callide)
Digitaria milanjiana | BrinonMaCh2004
Hemarthria altissima | PowellHa2026a
Megathyrsus maximus | PowellMiLa2026a
Ochthochloa compressa | BrinonMaCh2004 | (= Panicum compressum)
Oryza sativa | BenDov1994 GhoshGh1987 Varshn1992
Panicum maximum | BrinonMaCh2004
Paspalum | Summer1928
Paspalum dilatatum | BenDov1994 Willia1985
Paspalum setaceum | PowellMiLa2026a
Rottboellia cochinchinensis | AcaMarGoHe2025
Saccharum officinarum | BenDov1994 Brooke1978
Sorghum halepense | AcaMarGoHe2025
Urochloa mosambicensis | BrinonMaCh2004

Foes:

Families: 2 | Genera: 4

Coccinellidae

Cryptolaemus montrouzieri | Summer1928

Encyrtidae

Callipteroma sexguttata | Summer1928 | (= Leptomastix guttatipennis)
Parectromoidella | Hauxwe2022
Yasumatsuiola orientalis | PowellHa2026

Geographic Distribution

Countries: 9

Australia

Queensland | BenDov1994 Brooke1978 Summer1928

Barbados | PowellHa2026

India

West Bengal | BenDov1994 GhoshGh1987 Varshn1992 Willia2004a

Mexico

Quintana Roo | AcaMarGoHe2025

New Caledonia | BrinonMaCh2004

Pakistan | BenDov1994 Brooke1978 Willia2004a

Puerto Rico & Vieques Island

Puerto Rico | PowellHa2026

U.S. Virgin Islands | PowellMiLa2026a

United States

Florida | PowellHa2026a
Louisiana | Blanch2026
Texas | BilesSeSa2025

Keys

PowellMiLa2026a: pp.23 ( Adult (F) ) [Heliococcus with crateriform aggregations]
Willia2004a: pp.343 ( Adult (F) ) [Heliococcus species of southern Asia]
Tang1992: pp.458 ( Adult (F) ) [Palaearctic & Oriental regions]

Remarks

Systematics: urn:lsid:zoobank.org:act:8132324A-6D80-4A0E-889C-1C0229A15D4D
Once slide-mounted, Heliococcus Šulc has a unique type of crateriform tubular duct that makes it difficult to confuse with any other genus of mealybug . Slide-mounted characters and illustrations of H. summervillei are given in detail by Brookes (1978). A comparison of the old pasture mealybug, H. summervillei, and the new pasture mealybug, H. novovillei, is detailed in Powell, et al., 2026a.
Structure: Adult females of H. summervillei are about 2–4 mm in body length, while the tiny crawlers (the first-instar nymph mobile dispersal stage) are less than 0.5 mm in length. Immature (nymph) and unmated female mealybugs are a creamy-white color, with adult females turning pink after mating (Hauxwell, 2018; Hauxwell et al., 2022a). Males turn pink ahead of pupation and are pink in their winged adult form. (Powell & Hauxwell, 2026) Adult females cream-white in color, turning pink at maturity. With three distinct types of wax: a loose fluff of opaque wax arising from quinquelocular pores, straight iridescent rods arising from large crateriform ducts, these surrounded by more loose fluff produced by small crateriform ducts, and dense wax filaments arising from the cerarian setae on the anal lobe. In life, the wax rods arising from the crateriform aggregations (especially those in the dorsomedial areas) may look “fluffier” with less light refraction and thus they create less of an iridescent rainbow effect in H. summervillei compared with H. novovillei. This owes to the higher number of small crateriform ducts surrounding the large crateriform duct in these areas. When small crateriform ducts are fully replaced by quinquelocular pores in H. novovillei, no opaque wax surrounds the long rods. However, we stress that small crateriform number (and thus wax production) is variable, wax is easily broken or rubbed of, and field observations of wax should not be relied upon for separation of these two species. Study of slide-mounted specimens is required. (Powell, et al. 2026a)
Biology: Heavy infestations were observed on leaves of the host (Ghosh & Ghose, 1987). Mature female mealybugs and pupae of males were mainly found in the crown and dense thatch layers of grasses during the warmer, wetter conditions of late summer January to March) in both years. Mealybugs in the field appear to mate and females produce young in the protection of the dense crown and thatch layer of grasses in mid to late summer.. (Hauxwell, 2022)
Economic Importance: Summerville (1928) first reported on this species as "mealy bug" and presented observations on its economic importance, life history, control and natural enemies. Brinon et al. (2004) recorded this species from New Caledonia, reporting of severe damage to pasture grasses from 1998 to 2003. In 2003 the pest populations were almost completely reduced, probably due to unexplained natural causes. In Texas, it has been noted on and damaging Bermudagrass, Bahia grass, Johnsongrass, hay grazer (Sorghum-sudangrass), several bluestem species, and St. Augustine turfgrass. (Biles, et al. 2026a)
General Remarks: Description and illustration of adult female by Brookes (1978), Ghosh & Ghose (1987) [as Novonilacoccus oryzae] and by Williams (2004a). Description and illustration of first-instar nymph, second-instar female nymph and third-instar female nymph given by Ghosh & Ghose (1987) [as Novonilacoccus oryzae]. Description and illustration of adult male by Ghosh & Ghose (1989) [as Novonilacoccus oryzae]. Detailed redescription, photographs and illustration in Powell, et al., 2026b)

Illustrations

PowellHa2026

PowellHa2026a

Citations

AcaMarGoHe2025: chemical control, diagnosis, distribution, economic importance, host, illustration, natural enemies, record,
AhmedPoMi2025: dispersal, 10
BenDov1994: catalog, 38-39, 188
BilesSeSa2025: control, diagnosis, distribution, host, illustration, record,
BilesSeSa2026a: control, diagnosis, distribution, host, illustration,
Blanch2026: distribution, economic importance, host, illustration, record,
BrinonMaCh2004: distribution, economic importance, host, life history, 425-428
Brooke1978: description, distribution, host, illustration, taxonomy, 241, 242, 244
GhoshGh1987: description, distribution, host, illustration, taxonomy, 39-48
Hauxwe2018: biology, control, economic importance, illustration, natural enemies,
Hauxwe2022: biology, control, economic importance, natural enemies,
HauxweDiBr2022: control, diagnosis, endosymbiont, life history, molecular biology, natural enemies, phylogeny,
KondoWa2022a: distribution, host, list, 23
MilleHeCa2016: distribution, host, 149
PhilliBaBe2026: distribution, economic importance, host, 4
PowellHa2026: biology, distribution, economic importance, host, natural enemies, record,
PowellHa2026a: biology, distribution, economic importance, host, natural enemies, record,
PowellMiLa2026a: description, distribution, host, illustration, key, taxonomy, 17-22
SchneiPo2026: distribution, economic importance, list, 26
SchutzGoGu2026: distribution, morphology, taxonomy, 22-23
SchutzTrHa2019: dispersal, distribution, history, host, importance,
Summer1928: biological control, distribution, economic importance, host, life history, 201-209
Tang1992: description, distribution, host, taxonomy, 486
Varshn1992: distribution, host, 43
VercheSaEs2025: behavior, 11
Willia1985: distribution, host, taxonomy, 172
Willia2004a: description, distribution, host, illustration, taxonomy, 348-350
XuHuWi2024: control, host plant,