Scientific name

Pharoscymnus flexibilis (Mulsant) (=Neojauravia naeida Gordon & Almeida)

Taxonomic position

Coleoptera: Coccinellidae: Sticholotidinae: Sticholotidini

Diagnosis

Length 1.80-2.20 mm, width 1.40-1.85 mm. Form (Figs. 1a-k) broad oval, moderately convex. Head and pronotum reddish or yellowish brown. Elytra reddish or pale yellowish brown with four or five black spots, which are fused (Figs. 1g-k), reduced (the minimum being two) or obsolete (Fig. 1b, c, d). The subspecies Pharoscymnus flexibilis kashmirensis Kapur (1956) is more heavily pigmented and larger in size than the nominal species (Fig. 1e). Form found in south India pale golden yellowish brown with dark pitchy brown elytral spots, arranged in a 2-1-2-4 pattern (Fig. 1a) or much reduced in size and number or completely absent. Ventral side yellowish brown except pro-, meso-, and metasterna and first abdominal segment dark pitchy brown. Male genitalia (Figs. 2, 3) as illustrated.


Figs. 1-3. Pharoscymnus flexibilis: 1a-k. Elytral pattern variations; 2-3. Male genitalia: 2. Tegmen, ventral view; 3. Sipho.

Images

 Pharoscymnus flexibilis - Dorsal habitus of adult

Distribution

India: Widely distributed in northwestern Indian states. Rarely collected in peninsular India (Andhra Pradesh; Himachal Pradesh; Jammu & Kashmir; Karnataka; New Delhi; Rajasthan; Tamil Nadu; Uttar Pradesh). Nepal. Pakistan. Apparently accidentally introduced in Brazil.

Prey / Associated habitat

It is mainly predatory on Coccoidea and to some extent on other homopterous insects such as whiteflies and aphids. Kazmi and Ghani (1964) recorded the adults as feeding on mites.

HEMIPTERA: Aleyrodidae: Indeterminate whiteflies. Aphididae: Eriosoma lanigerum (Hausmann). Coccoidea: Aonidiella citrina (Coquerel), Aonidiella orientalis (Newstead), Aspidiotus destructor Signoret, Aulacaspis tubercularis Newstead, Chrysomphalus ficus (Ashmead), Chrysomphalus aonidum (Linnaeus), Coccus hesperidum Linnaeus, Cryptoparlatoreopsis sp., Diaspidiotus perniciosus (Comstock), Hemiberlesia lataniae (Signoret), Hsuia sp., Lepidosaphes ?conchiformis (Gmelin), Leucaspis coniferarum Hall & Williams, Nipaecoccus viridis (Newstead) (as N. vastator (Maskell)), Odonaspis penicillata Green, Parasaissetia (as Saissetia) nigra (Nietner), Parlatoria blanchardi (Targioni Tozzetti), Parlatoria crypta McKenzie, Parlatoria ghanii Hall & Williams, Parlatoria oleae (Colvee), Pinnaspis strachani (Cooley), Phoenicococcus marlatti Cockerell, Pseudaulacaspis sp., Pulvinaria (as Chloropulvinaria) polygonata Cockerell, Rastrococcus iceryoides (Green), Rastrococcus spinosus (Robinson), Salicicola kermanensis (Lindinger), Tecaspis sp., Temnaspidiotus sinensis Ferris, Trabutina (as Naiacoccus) sp. ACARI: Tenuipalpidae: Cenopalpus pulcher (Canestrini & Fanzago). Tetranychidae: Eutetranychus orientalis (Klein), Tetranychus turkestani atlanticus McGregor.

Collected in association with scales on temperate fruits such as apple, peach, and pear, citrus, mango, Salix sp., date palm, Zizyphus mauritiana, Melia azedarach, Pinus longifolia, Pinus roxburghii, Dendrocalamus strictus, Bambusa vulgaris, Olea cuspidata, castor, coconut, Ficus palmata, Eugenia cumini, etc.

Seasonal occurrence

Active during April-May and July-October in northwestern India and Pakistan. Hibernation takes place in the adult stage (Kapur, 1956).

References

  • Ghani, M.A.& Ahmad, R. 1966. Biology of Pharoscymnus flexibilis (Muls.) (Col.: Coccinellidae). Technical Bulletin, Commonwealth Institute of Biological Control, 7, 107-111.
  • Kapur, A.P. 1956. Systematic and biological notes on the ladybird beetles predacious on the San Jose scale in Kashmir with description of a new Records of the Indian Museum, 52 (1954): 257-274.
  • Puttarudriah, M. & Channabasavanna, G.P. 1953. Beneficial coccinellids of Mysore-I. Indian Journal of Entomology, 15: 87-96.
  • Puttarudriah, M. & Channabasavanna, G.P. 1955. Beneficial coccinellids of Mysore-II. Indian Journal of Entomology, 17: 1-5.
  • Sharma, D.C., Rawat, U.S. & Pawar, A.D. 1990. Effect of temperature and humidity on the development, longevity and predatory potential of Pharoscymnus flexibilis Muls. on San Jose scale. Journal of Biological Control 4: 11-14.