Recent trends in biological control of scale insects on fruit crops in India


  • Former Head, Division of Entomology, Nematology, Indian Institute of Horticultural Research, Bangalore - 560 089, Karnataka



Biological control, fruit crops, hard scales, predator, parasitoids, scale insects, soft scales


Scale insects are sap feeders, causing threat to the cultivation of several fruit crops. The scale insects can be grouped into two broad categories. The first group belonging to family Diaspidide, comprises many species of armoured scales (hard scales) belonging to the genera. Aonidiella, Aulacaspis, Pseudaulacaspis, Hemiberlesia, Aspidiotus, Chrysomphalus, Pinnaspis, Parlatoria etc. The second category belonging to family Coccidae comprises of the soft scales belonging to the genera Coccus, Puvinaria, Chloropulvinaria, Saisettia, Parasaisettia, Vinsonia, Drephanococcus, Ceroplastes, Ceroplastodes, etc. Scale insects are highly polyphagous, but certain species cause severe damage to specific fruit crops viz. the red scale, Aonidiella aurantii (Maskell) on citrus; latania scale, Hemieberlesia lataniae (Sign.) on grapevine.; white scale, Aulacaspis tubercularis (Newstead) on mango; green shield scale, Pulvinaria psidii (Maskell) on guava, lemon and sapota, Pulvinaria polygonata (Ckll.) on mango; green scale Coccus viridis (Green) on citrus and sapota and Drephanococcus chiton (Green) on ber and guava. Insecticides are not effective due to the presence of protective cover over the scales. On the other hand, scale insects are more amenable for biological control due to their sedentary habit and colonial distribution. Several scale insects are well regulated by the local predators. In nature, green shield scale, Pulvinaria psidii (Maskell) is kept under check by the predator, Australian ladybird beetle Cryptolaemus montouzieri Mulsant on guava, sapota and lemon. The reduction of the mango green shield scale Pulvinaria polygonata was attributed mainly to the action of the predators C. montrouzieri and Spalgis epeus Westwood. The green scale Coccus viridis on acid lime and white scale Aulacaspis tubercularis on mango are well regulated by the coccinellids Chilocorus nigrita (Fab) and C. circumdatus Sch. Local parasitoids are also known to effectively check the populations of the scale insects on different fruit crops. The encyrtid Anicetus ceylonensis How and the pteromalid Cephaleta brunniventris Motsch are responsible for the suppression of wax scale Drephanococcus chiton on ber and guava. The aphelinid parasitoid, Pteroptrix koebeli How. plays a major role in the regulation of the mango scale Aulacaspis tubercularis. On sapota, the aphelinid parasitoid Coccophagus sp. was the dominant natural enemy causing up to 95 % parasitism. Scutellista cyanea Motsch. (Pteromalidiae: Hymenoptera) was able to suppress Parasaissetia nigra (Nietner) on custard apple and pomegranate. In the absence of effective biocontrol agents in nature, parasitoids and predators have to be released in the field for obtaining an effective and quicker suppression of the scale insects. Release of adult C. nigirita was found to be effective in the control of the red scale on citrus in Karnataka, Andhra Pradesh and Punjab. Release of C. infernalis (C.bijugus) Mulsant @ 10-20 beetles/tree once in April-May has also been recommended to reduce Sanjose scale. The white halo fungus, Lecanicillium (Verticillium ) lecanii can be sprayed at 16 x 106 spores/ml along with 0.05% of sticking agents in the evening hours at 15 days interval to control the green scale in the hilly areas during cooler months. The biocontrol agents can be integrated with plant origin insecticides as they do not affect the activity of these agents.


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Agarwal MM, Agarwal S, Khan MA. 1984. Some new chalcid parasites (Hymenoptera; Encyrtidae) recorded from India. J Ent Res. 8: 61–69.

Ali SM. 1964. Some studies on Pulvinaria cellulose Green, a mealy scale on mango in Bihar. Indian J Ent. 26: 361–362

Anon. 1979. Final Tech. Rep. of All India Co-ordinated Research Project on Biological control of crop pests and weeds. IIHR, Bangalore-89, 106 pp.

Anon. 1980. Annual report of All India Co-ordinate Research Project on Biological control of crop pests and weeds. PDBC, Bangalore-89.

Ayyar TVR. 1929. A contribution to our knowledge of South Indian coccidae (scales and mealybugs). Imperial Institute of Agricultural Research, Pusa, Bull. No.197, 72 p.

Bartlett BR. 1978. Margorodidae in Introduced parasites and predators of Arthropod pests and weeds. A world Review (Ed. C.P. Clausen) USDA, Agricultural Hand book No. 480, pp. 132–136.

Batra RC, Sandhu GS, Sohi AS. 1987. Outbreak of California red scale on citrus and suppression through coccinellid predators in the Punjab. Bull Ent. (New Delhi) 20: 161–62.

Beingolea GO. 1969. Biological control of citrus pests in Peru. Proc 1st Int Citrus Symp Riverside, Calif. 2: 827–838.

Bennet FD, Hughes IW. 1959. Biological control of insect pests in Bermuda. Bull Ent Res. 50: 423–436.

Bennet FD, David Rosen P, Cochereau P, Wood BJ. 1976. Biological control of pests of tropical fruits and nuts in Theory and Practice of Biological control. In: Huffakar CB editor. Messenger Academic Press, New York, pp. 359–387.

Chacko MJ, Bhat PK, Rao LVA, Deepak Singh MB, Ramanarayan EP, Sreedharan K. 1978. The use of ladybird beetle, Cryptolaemus montrouzieri for the control of coffee mealybugs. J Coffee Res. 8: 14–19.

CIBC, 1984. Survey for natural enemies of diaspine scale insects in South India. Final Technical Report of US. PL 480 Project, CIBC, Indian station, Bangalore 87 pp.

Compere H. 1961. The red scale and its natural enemies. Hilgardia 31: 173–278.

Das BK, Sahoo AK. 2005 Record of parasitoids of some scale and mealybug pests of mango from West Bengal, India. J of Biol Cont 19: 71–72

De Bach P. 1959. Ann Entomol Soc Amer. 55: 354–362.

Dhara Jothi B, Tandon PL. 1991. Present status of pest of sapota in Karnataka. Paper presented at National Seminar on optimisation of productivity and utilisation of sapota held at Navsar, India, 1991 Oct 18.

Easwaramoorthy S, Jayaraj S. 1977. Control of guava scale, Pulvinaria psidii Mask., and chili aphid, Myzus persicae (Sulz.), with Cephalosporium lecanii Zimm. and insecticides. Indian Journal of Agricultural Science 43: 136–139.

Elder RJ, Smith D, Bell KL. 1998. Successful parasitoid control of Aonidiella orientalis (Newstead) (Hemiptera: Diaspididae) on Carica papaya L. Australian Journal of Entomology. 37(1): 74–79.

Glover PM. 1935. An account of the occurrence of Chrysomphalus aurantii Mask and Laccifera lacca Kerr. on grape fruit in Ranchi district, chcota Nagpur with a note on the chalcidoid parasites of Aspidiotus orientalis Newst. J Bombay Nat Hist Soc. 38: 151–53.

Hayat M. 1974. Some Indian species of Aphelinidae with the descripyion of new Coccophagus (Hymenoptera::Chalcidoidea) J Nat History 8: 179–188

Hussain T, Agarwal MM. 1982. Studies on some aphelinid (Hym.:Chalcidoidea) parasites of hemipterous insects of India. J Bombay Nat Hist Soc. 79: 1:155–162.

Jadav SS, Ajri DS. 1981. A new record of Scutellista cynaeae Mots (Pteromalidae, Hymenoptera), an external parasite of Parasiassettia nigra (Nietner) on pomegranate in Maharashtra state. Indian J Ent. 43: 112.

Joshi JC, Rao PK, Rao BHKM. 1981. A new record of Aneristus ceroplastae Howard on brown soft scale Coccus hesperidium L. on a new host papaya from India. Entomon. 6: 2:129–130.

Krishnamoorthy A. 1993. Bionomics and development of integrated management strategy for California red scale, Aonidiella aurantii (Maskell). Ph.D. Thesis, University of Agric. Sci., Bangalore, India.

Krishnamoorthy A, Rajagopal D. 1995. Comparative toxicity of pesticides to natural enemies of California red scale, Aonidiella aurantii (Maskell). Pest Management in Horticultural Ecosystems 1: 2:71–79.

Kumar A. 2013. Fig wax scale, Ceroplastes rusci an emerging pest of Dalbergia sissoo and its parasitisation in India. International Journal of Current Science 8: 106–114.

Mani M. 1995. Studies on the natural enemies of the wax scale Drepanococcus chiton (Green) (Homoptera, Coccidae) on ber and guava in India. Entomon. 20: 55–58.

Mani M. 2002. Recent trends in biological control of fruit crop Pests in India. In Strategies in Integrated Pest Management. In: Ignacimuthu, Sen A editors. Phoenix Publishing House Pvt. Ltd., New Delhi, pp. 41-57.

Mani M, Krishnamoorthy A. 1990. Evaluation of the exotic predator Cryptolaemus montrouzieri Muls. (Coccinellidae, Coleoptera) in the suppression of green shield scale Chloropulvinaria psidii (Maskell) (Coccidae, Homoptera) on guava. Entomon. 15: 45–48.

Mani M, Krishnamoorthy A. 1995. Toxicity of pesticides to the wax scale parasitoid, Cephaleta brunniventris. Indian J Plant Prot. 22(1): 108–109.

Mani M, Krishnamoorthy A. 1996. Discovery of the coccinellid predator, Chilocorus circumdatus on the green scale, Coccus viridis. Entomon. 21(3&4): 295–296.

Mani M, Krishnamoorthy A. 1997. Biological suppression of the soft green scale, Coccus viridis (Green) and the green shield scale, Chloropulvinaria psidii (Maskell) on sapota. Pest Management in Horticultural Ecosystems. 3(2): 114–116.

Mani M, Krishnamoorthy A. 1998a. Studies on the natural enemies of the mango scale, Aulacaspis tubercularis Newstead (Diaspididae, Homoptera). Paper presented in the National Symposium on Mango Production and Export, Lucknow. June 25–27.

Mani M, Krishnamoorthy A. 1998b. Suppression of the soft green scale Coccus viridis (Green) on acid lime in India. Proc I Natl Symp Pest Mgmnt Hort Crops. Bangalore, 1998. p. 210–212.

Mani M, Krishnamoorthy A. 1998c. Biological control studies on the mango green shield scale, Chloropulvinaria polygonata (Ckll.) (Homoptera: Coccidae) in India. Entomon. 23(2): 105–110.

Mani M, Krishnamoorthy A. 1999a. Suppression of green shield scale, Chloropulvinaria psidii (Maskell) with Australian ladybird beetle on lemon. Insect Environment 4(4): 116–117.

Mani M, Krishnamoorthy A. 1999b. The nigra scale Parasaissetia nigra and its natural enemies on custard apple in Karnataka. Insect Environment 5 (1): 20.

Mani M, Krishnamoorthy A. 2001. Managing scale insects on fruit crops. Indian Horticulture 46(3): 4–7.

Mani M, Krishnamoorthy A. 2017. Recent trends in biological control of scale insects on fruit crops in India. Paper presented in Fifth National Conference on Biological Control: Integrating Recent Advances in Pest and Disease Management from 9-11 February, 2017 at NABIR, Bangalore, India.

Mani M, Gangavisalkshi PN, Krishnamoorthy A, Venugopalan R. 2008. Role of Coccophagus sp in the suppression of Soft green scale Coccus viridis (Green) (Coccidae; Homoptera) on sapota. Biocontrol Sci Tech. 18(8): 721–725.

Manjunath TM. 1986. Recent outbreaks of mealybugs and their biological control in Resurgence of sucking pests. Proc Natl symp. In: Jayaraj S. editor. TNAU, Coimbatore, pp. 249–253.

Masoodi MA, Trali AR, Bhat AM, Tikku RK, Nehru KK. 1989. Establishment of Aphytis sp. proclia of San Jose scale in Kashmir. Indian J Plant Prot. 17: 71–73.

Nagalingam B. 1980. New record of three aphelinid and three encyrtid parasites on citrus scale insect Pinnaspis aspidistrae (Sign.) Curr Res. 9: 191–92.

Nair MRGK. 1975. Insects and mites of crops in India. ICAR, New Delhi, 185 pp.

Narasimham AU. 1987. Scale Insects and Mealybugs on Coffee, Tea and Cardamom and their Natural Enemies. Journal of Coffee Research 17: 7–13.

Patil RR, Hugar PS, Benagi VI, Mathad JC. 2016. Status and incidence of scale insect, Hemilecanium imbricans (Green) (Coccidae: Homoptera) on mango and other host plants in few districts of Karnataka. Journal of Experimental Zoology, India 19: 883–89.

Pruthi HS, Mani MS. 1945. Our knowledge of the insects and mites pests of citrus in India and their control. ICAR monograph No. 16, 42 pp.

Puttarudriah M, Channabasavanna GP. 1957. Beneficial Coccinellidae of Mysore II. Mysore Agric J. 32: 4–19.

Rajagopal D, Krishnamoorthy A. 1996. Bionomics and management of oriental yellow scale, Aonidiella orientalis (Newstead) (Homoptera:Diaspididae): an over view. Agricultural Reviews (Karnal) 17(3/4): 139–146.

Rao VS, Rao VP. 1960. Introduction of Prospaltella perniciosi for the control of San Jose scale in India and Pakistan. FAO Plant Prot Bull. 8: 120–123.

Rao VP. 1969. India as a source of natural enemies of pests of citrus. Proc. First Internatl Ramachandran, T.S. 1954. Insect pests of orange in Madras state. Bull Madras Agric Dept. 16 pp.

Ramachandran TS. 1954. Insect pests of orange in Madras state. Bull Madras Agric Dept. 16 pp.

Rawat US, Thakur JN, Pawar AD. 1988. Introduction and establishment of Chilocorus bijugus Mulsant and Pharoscymmus flexibilis Mulsant, predatory beetles of San Jose scale in Thanedhar areas of Himachal Pradesh, Curr Sci. 57: 1250–1251.

Reddy KB, Bhat PK, Naidu R. 1997. Suppression of Mealy Bugs and Green Scale Infesting Coffee with Natural Enemies in Karnataka. Pest Management and Economic Zoology 5: 119–121.

Rosen D. 1990. World Crop Pests. 4B. Armoured Scale Insects: their biology, natural enemies and control. Amsterdam, Netherlands: Elsevier Science Publishers, 688 pp.

Rosen M, DeBach P. 1986. Three new species of Aphytis (Hymenoptera: Aphelinidae), parasites of Pseudaulacaspis spp. (Homoptera: Diaspididae) in India and Australia, Entomophaga 31: 139–51.

Sahai B, Joshi LD. 1965. Bionomics and biological control of San Jose scale (Quadraspidiotus perniciosus Comstock) in U.P. Punjab Hort J. 5: 37–43.

Sharma JP, Dogra GS. 1986. Studies on the control of plum scale Eulecanium tiliae (L) (Homoptera Coccidae) through chemicals and natural enemies. Indian J Ent. 48: 258–268.

Singh SP. 1985. Biological control of insect pests of horticulture. Proc Natl Sem Entomoph Ins., Calicut, pp. 221–231.

Singh SP. 1993. Biological control of pests in Advances in Horticulture 3. In: Chadha KL, Pareek OP editors. Malhotra Publishing House, New Delhi, pp. 1591–1616.

Singh SP. 2000. Biological control in horticultural crops. Indian Horticulture 45(1): 54– 60.

Singh SP, Rao NS. 1977. Effectiveness of different contact insecticides against green scale, Coccus viridis (Green) (Coccidae, Homoptera) on citrus. Pesticides 11: 33–36.

Sinha PK, Dinesh DS. 1984. A report on the coccids (Hemiptera:Coccoidea), their host plants and natural enemies in Bhagalpur. Biol Bull India 6: 7–12.

Tandon PL. 1985. Spatial distribution, sampling technique and population dynamics of citrus green scale Coccus viridis (Green) on mandarin, Ph.D. Thesis, UAS, Bangalore, 278 pp.

Tandon PL, Srivastava RP. 1980. New records of parasites and predators of important insect pests of mango. Entomon. 5: 243–44.

Thakur JN, Rawat US, Pawar AD. 1989. Investigations on the occurrence of natural enemies of San Jose scale, Quadraspidiotus perniciosus Comstock (Hemiptera: Coccidae) in Jammu and Kashmir and Himachal Pradesh, Entomon 14: 143–146.

Tirumala Rao V, David AL, Mohan Rao KR. 1954. Attempts at the utilisation of Chilocorus nigritus Fab. (Coleoptera, coccinellidae) in the Madras State. Indian J Ent. 16: 205–9.

Viljoen HM, Villiers EA. 1987. Effectiveness of fenvalerate and monocrotophos against the mango scale, Aulacaspis tubercularis Newstead. Information Bulletin, Citrus and Subtropical Fruit Research Institute, South Africa, No.173, pp 19–23.




How to Cite

Mani, M. (2017). Recent trends in biological control of scale insects on fruit crops in India. Journal of Biological Control, 30(4), 198–209.



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