In Search of Insect Vectors of Phytoplasmas with a Note on Vectors of Xylella fastidiosa

Authors

  • C. A. Viraktamath Department of Entomology, University of Agricultural Sciences, GKVK, Bengaluru 560065

DOI:

https://doi.org/10.55446/IJE.2022.454

Keywords:

Aphrophoridae, Auchenorrhyncha, Cercopidae, Cicadellidae, Delphacidae, Derbidae, Hishimonus, Orosius, phytoplasma, vector-pathogen interaction, Xylella fastidiosa

Abstract

Phytoplasmas are phloem restricted, Gram positive bacteria without cell walls and are transmitted by phloem-sap feeding Hemiptera families such as Cicadellidae, Delphacidae, Cixiidae, Derbidae, Psyllidae and rarely by Pentatomidae and Tingidae. In the first part, this review briefly presents information available on the interaction among the phytoplasmas, their insect vectors, host plants and also very briefly the environment. In the second part, it deals with the xylem restricted, vector transmitted, Gram negative, Xylella fastidiosa (Wells et al.) and most likely candidate vectors if the organism gets accidentally introduced into India. Two proven vectors of X. fastidiosa in Taiwan namely, Kolla paulula (Walker) and Bothrogonia ferruginea (Fabricius) occur in India. In the third part, ways to search for the promising vectors of both the pathogens is dealt with. Emphasis is laid on for a close cooperation amongst insect taxonomists, molecular biologists and plant pathologists to look into investigations dealing with these organisms right from the initial stages. Brief account of confirmed and putative vectors of phytoplasmas in India and most likely groups of Auchecnorrhyncha that may vector X. fastidiosa are given and the species dealt with are illustrated for ease of preliminary identification. Use of recent advances in tissue culture, vector biology, artificial feeding of Hemiptera and molecular biology are suggested for fast tracking the search for vectors of these pathogens.

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Published

2023-12-01

How to Cite

Viraktamath, C. A. (2023). In Search of Insect Vectors of Phytoplasmas with a Note on Vectors of <i>Xylella fastidiosa</i>. Indian Journal of Entomology, 85(4), 1165–1186. https://doi.org/10.55446/IJE.2022.454

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Review Articles

References

Alma A, Bosco D, Danielli A, Bertaccini A, Vibio M, Arzone A. 1997. Identification of phytoplasmas in eggs, nymphs and adults of Scaphoideus titanus Ball reared on healthy plants. Insect Molecular Biology 6: 115-121.

Alma A, Tedeschi R. 2011. Emerging phytoplsama diseases: research of the insect vectors. Phytopathogenic Molecutes 1(2): 55-58.

Alma A, Lessio F, Nickel H. 2019. Insects as phytoplasma vectors: Ecological and epidemiological aspects. pp. 1-25. In: Bertaccini A, Weintraub PG, Rao GP, Mori N. (eds.) Phytoplasmas: plant pathogenic bacteria-II. Transmission and management of phytoplasma-associated diseases. Springer Nature Singapore Pte Ltd.

Almeida RPP. 2016.Xylella fastidiosa vector transmission biology. Brown, J.K. (ed.) Vectormediated transmission of plant pathogens. APS Publications. pp.165-173.

Almeida R P P, Blua M J, Lopes J R S, Purcell A H. 2005. Vector transmission of Xylella fastidiosa: Applying fundamental knowledge to generate disease management strategies. Annals of Entomological Society of America 98: 775-786.

Almeida R P P, Purcell A H. 2003. Homalodisca coagulata (Hemiptera, Cicadellidae) transmission of Xylella fastidiosa to almond. Plant Disease 87: 1255-1259.

Almeida RPP, Purcell A H. 2006. Patterns of Xylella fastidiosa colonization on the precibarium of sharp shooter vectors relative to transmission to plants. Annals of Entomological Society of America 99: 884-90.

Backus E A. 1985. Anatomical and sensory mechanisms of leafhopper and planthopper feeding behaviour. pp.163-194. Nault, L.R. Rodriguez, J.G. (eds.) The leafhoppers and planthoppers. John Wiley Sons.

Backus E A, Serrano M S, Ranger C M. 2005. Mechanism of hopper burn: an overview of insect taxonomy, behaviour and physiology. Annual Review of Entomology 50: 125-151.

Balasundaran N, Mohamed Ali M I, Ghosh H K, Sundararaman V. 1988. Presence of sandal spike MLO in the insect vector Redarator bimaculatus and plants fed with the vector. pp. 23-28. Raychoudhuri S P, Rishi N. (eds.). Mycoplasma diseases of woody plants. Malhotra publishing House, New Delhi, India.

Beanland L, Hoy C W, Miller S A, Nault L R. 1999. Leafhopper transmission of the aster yellow phytoplasma: Does sex matter? Environmental Entomology 28: 1101-1106.

Bertaccini A, Duduk B. 2009. Phytoplasma and phytoplasma diseases: a review of recent research. Phytopathologia Mediterranea 48: 355-378.

Bindra OS, Singh B. 1969. Biology and bionomics of Hishimonus phycitis (Distant), a jassid vector of ‘little leaf’ disease of brinjal (Solanum melongena L.). Indian Journal of Agricultural Science 39(9): 912-919.

Bindra O S, Singh S, Sohi A S. 1970. Taxonomy and distribution of Indian species of Circulifer (Homoptera: Cicadellidae). Annals of the Entomological Society of America 63(3): 664-667.

Bindra OS, Sohi AS. 1968. Host range of Hishimonus phycitis (Distant) [Homoptera: Jassidae], the vector of little leaf of brinjal. Journal of Research, Punjab Agricultural University, Ludhiana 5(2): 232-236.

Bosco D, D’Amelo R. 2010. Transmission specificity and competition of multiple phytoplasmas in the insect vector. pp. 293-308. In: Weintraub, P. Jones P. (eds.) Phytoplasmas: genomes, plant hosts and cectors.CAB International.

Bosco D, Minucci C, Boccardo G, Conti M. 1997. Differential acquisition of chrysanthemum yellows phytoplasma by three leafhopper species. Entomological Experimental is etApplicata 83: 219-224.

Botti S, Bertaccini A. 2006. Phytoplasma infection through seed transmission: further observations. 16th International Congress of the IOM, Cambridge, United Kingdom, 76: 113.

Bressan A, Clair D, Semetey O, BoudonPadieu E. 2006. Insect injection and artificial feeding bioassays to test the vector specificity of Flavescence doree phytoplasma. Phytopathology 96: 790-796.

Chiyakowski L N, Sinha R C. 1988. Some factors affecting the transmission of eastern peach X-mycoplasma like organism by the leafhopper, Paraphepsius irroratus. Canadian Journal of Plant Pathology 10: 85-92.

Christensen N M, Axelsen K B, Nicolaisen M, Schultz A. 2005. Phytoplasmas and their interactions with their hosts. Trend in Plant Science 10: 526-535.

Christensen N M, Nicolaisen M, Hansen, M, Schultz A. 2004. Distribution of phytoplasmas in infected plants as revealed by real time PCR and bioimaging. Molecular Plant-Microbe Interactions 17: 1175-1184.

Chuche J, Auricao-Bouvery N, Danet J L, Thiery D. 2017. Use the insiders: could insect facultative symbionts control vector borne plant diseases? Journal of Pest Science 90: 51-68.

Cook A G, Perfect T J. 1989. The population characteristics of the brown planthopper, Nilaparvata lugens in the Philippines. Ecological Entomology 14: 1-9.

Cordova I, Jones P, Harrison N A, Oropeza C. 2003. In situ detection of phytoplasma DNA in embryos from coconut palm with lethal yellowing disease. Molecular Plant Pathology 4: 99-108.

Cornara D, Saponari M, Zeilinger A R, de Stradis A, Boscia D, Loconsole G. 2017. Spittlebugs as vectors of Xylella fastidiosa in olive orchards in Italy. Journal of Pest Science 90: 521-530.

Danbielli A, Bertaccini A, Alma A, Bosco D, Vibio A, Arzone A. 1996. May evidence of 16SrI group related phytoplasmas in eggs, nymphs and adults of Scaphoideus titanus Ball suggest their transovarial transmission? IOM Letters 4:190-91.

Dash P C, Viraktamath C A. 1998. A review of the Indian and Nepalese grass feeding genus Deltocephalus (Homoptera: Cicadellidae) with description of new species. Hexapoda 10(1&2): 1-59.

Dietrich C H, Rakitov R A, Holmes J L, Black IV W C. 2001. Phylogeny of the major lineages of Membracoidea (Insecta: Hemiptera: Cicadomorpha) based on 28S rDNA sequences. Molecular Phylogenetics and Evolution 18 (2): 293-305.

Distant W L. 1908. Rhynchota Homoptera. In: Bingham CT. (eds.) The Fauna of British India including Ceylon and Burma, Vol.4, xv + 501 p.

Distant W L. 1916. Rhynchota Homoptera: Appendix. In: Shipley A E, Marshall GAK. (eds.). The Fauna of British India including Ceylon and Burma, Vol. 6, viii+248 p.

Dover C, Appanna M. 1934. Entomological investigations on the spike disease of sandal. 20. Studies on insect transmission. Indian Forest Records 20 (1): 1-25.

Ebbert M A, Jeffers D P, Harrison H A, Nault L R. 2001. Lack of specificity in the interaction between two maize stunting pathogens and field collected Dalbulus leafhoppers. Entomologica Experimentalis etApplicata 101: 49-57.

EFSA 2015. Scientific opinion on the risks to plant health posed by Xylella fastidiosa in the EU territory, with the identification and evaluation of risk reduction options. EFSA Journal 13: 1-262.

Fletcher M, Locker H, Mitchell A, Gopurenko D. 2017. A revision of the genus Orosius Distant (Hemiptera: Cicadellidae) based on male genitalia and DNA bar coding. Astral Entomology 56: 198-217.

Galetto L, Nardi M, Saracco P, Bressan A, Marzachì C, Bosco D. 2009. Variationin vector competency depends on chrysanthemum yellows phytoplasma distribution within Euscelidius variegatus. Entomologia Experimentalis et Applicata 131: 200-207.

Galetto L, Merzachi C, Demichelis S, Bosco D. 2011. Host plant determines the phytoplasma transmission competence of empoasca decipiens (Hemiptera: Cicadellidae). Journal of Economic Entomology 104: 360-366.

Ghosh S K, Mohemmed Ali M I, Balasundaran M, Mathew G. 1983. Redarator bimaculatus, a possible vector for sandal spike in Kerala. International Journal for Plant Disease 1: 197-198.

Gopala, Rao G P. 2018. Molecular characterization of phytoplasma associated with four important ornamental plant species in India and identification of natural potential spread sources. Biotech 8: 116.

Guldur M E, Caglar B K, Castellano M A, Unlu L, Guran S, Yilmaz M A, Martelli G P. 2005. First report of almond leaf scorch in Turkey. Journal of Plant Pathology 87: 246-246.

Hanboonsong Y, Choosai1 C, Panyim S, Damak S. 2002. Transovarial transmission of sugarcane white leaf phytoplasma in the insect vector Matsumuratettix hiroglyphicus (Matsumura). Insect Molecular Biology 11 (1): 97-103.

Hanboonsong Y, Ritthison W, Choosai C, Sirithorn P. 2006. Transmission of sugarcane White leaf phytoplasma by Yamatotettix fulvovittatus, a new leafhopper vector. Journal of Economic Entomology 99(5): 1531-537.

Hiruki C. 1999. Paulownia Witches’-broom disease important in Asia. ISHA ActaHorticulture 495: 63-68.

Hopkins D L. 1989. Xylella fastidiosa: xylem-limited bacterial pathogen of plants. Annual Review of Phytopathology 27: 271-290.

Hoshi A, Ishii Y, Kakizawa S, Oshima K, Namba S. 2007. Host parasite interaction of phytoplasmas from a molecular biological perspective. Bulletin of Insectology 60: 105-107.

Janse J D, Obradovic A. 2010. Xylella fastidiosa: Its biology, diagnosis, control and risks. Journal of Plant pathology 92 (1 supplement): S1.35-S1.48.

Jindal KK, Sharma RC. 1987. Outbreaks and new records. Almond leaf scorch - a new disease from India. FAO Plant Protection Bulletin 35: 64-65.

Kawakita H, Saiki T, Wei W, Mitsuhashi W, Watanabe K. 2000. Identification of mulberry dwarf phytoplasmas in the genital organs and eggs of leafhopper Hishimonoides sellatiformis. Phytopathology 90: 909-914.

Kersing U, Baspinar H. 1997. Occurrence and distribution of Spiroplasma citri and sesame phyllody in sesame in Southern Anatolia. Journal of Turkish Phytopathology 26: 1-9.

Khan A J, Botti S, Paltrinieri S, Al-Subhi A M, Bertaccini A. 2002. Phytoplasmas in alfalfa seedlings: infected or contaminated seeds? 14th International Congress of the IOM, Vienna, Austria, 6.

Khan Z R, Saxena R C. 1984. Technique for demonstrating phloem or xylem feeding by leafhoppers (Homoptera: Cicadellidae) and planthoppers (Homoptera: Delphacidae) in rice plant. Journal of Economic Entomology 77: 550-552.

Klein M. 1970. Safflower phyllody a mycoplasma disease of Carthemus tinctorusin Israel. Plant Disease Reporter 54: 735-738.

Klein M, Rasooly P, Racca B. 1988. New findings on the transmission of Spiroplasma citri, the citrus stubborn disease in Israel, by a beet leafhopper from the Jordan valley. Hassadey 68: 1736-1737.

Kochu Babu M. 1993. Investigations on spear rot complex of oil palm (Elaeis guineensis Jacq.) Ph.D. thesis, Mangalore University, Mangalore, Karnataka, India. pp. 178.

Kumara A D, Perera L, Meegahakumbura M K, Aratchige N S, Fernando L C. 2015. Identification of putative vectors of Weligama coconut leaf wilt disease in Sri Lanka. In: Chakravarthy A K. (Ed.) New Horizons in Insect Science: Towards Sustainable Pest Management 2015 (pp. 137-146). Springer, New Delhi.

Lee I M, Danielli A, Bertaccini A, Vibio M, Bartoszyk I M. 1996. Multiple phytoplasmas detected in two species of Homopteran feeding on pear trees with decline symptoms. International Organization of Mycoplasmology Letters 4: 199.

Lee I, Davis R E, Gundersen-Rindal D E. 2000. Phytoplasma: phytopathogenic mollicutes. Annual Review of Microbiology 54: 221-255.

Lefol C, Caldwell A, Lheminier J, Larrue J. 1993. Attachment of the Flavescence doree pathogen (MLO) to leafhopper vectors and other insects. Annals of Applied Biology 123: 611-622.

Lefo l C, Lherminier J, Padeiu E B, Larrue J, Louis C. 1994. Propagation of Flavescence doree MLO (mycoplasma-like organism) in the leafhopper vector Euscelidius variegatus Kbm. Journal of Invertebrate Pathology 63: 285-293.

Lett J M, Granier M, Turpin P, Molinaro F. 2001. Electrical penetration graphs from Cicadulina mbila on maize, the fine structure of its stylet pathways and consequences for virus transmission efficiency. Entomologica Experimentalis etApplicata 101: 93-109.

Leu L S, Su C C. 1993. Isolation, cultivation, and pathogenicity of Xylella fastidiosa, the causal bacterium of pear leaf scorch disease in Taiwan. Plant Disease 77: 642-646.

Lherminier J, Prencier G, Padeiu B E, Caldwell A. 1990. Immunolabelling of grapevine Flavescence doree MLO in salivary glands of Euscelidius variegatus: a light and electronic microscopic study. Journal of Histochemistry and Cytochemistry 38: 79-86.

Maramarosch K, Granados RR, Hirumi H. 1970. Mycoplasma diseases of plants and insects. Advances in Virus Research 16: 135-193.

Martelli G P, Boscia D, Porcelli F, Saponari M. 2016. The olive quick decline syndrome in South East Italy: a threatening phytosanitary emergency. European Journal of Plant Pathology 144(2): 235-243.

Mathen K, Rajan P, Radhakrishnan Nair CP, Sasikala. 1990. Transmission of root (wilt) disease to coconut seedlings through Stephanitis typica (Distant) (Heteroptera: Tingidae). Tropical Agriculture 67: 69-73.

Matsumuto T, Lee CS, Teng W S. 1968. Studies on sugarcane white leaf disease of Taiwan with special reference to transmission by a leafhopper, Epitettix hiroglyphicus Mats. Proceedings of the Society of the Sugarcane Technologists 13: 1090-1099.

Meshram N M, Chaubey R. 2016. Two new species of the genus Hishimonus (Hemiptera: Cicadellidae) with a new record from India. Zootaxa 4103(3): 259-266.

Muniyappa V, Viraktamath C A. 1981. Transmission of rice yellow dwarf with the blue race of Nephotettix virescens. IRRI Newsletter 6(2): 15.

Murral D J, Nault L R, Hoy C W, Madden L V, Miller S A. 1996. Effects of temperature and vector age on transmission of two Ohio strains of aster yellows phytoplasma by the aster leafhopper (Homoptera: Cicadellidae). Journal of Economic Entomology 89: 1223-1232.

Nabi S, Madhupriya, Dubey D K, Rao G P, Baranwal V K, Sharma P. 2015. Molecular characterization of ‘Candidatus Phytoplasma asteris’ subgroup I-B associated with sesame phyllody disease and identification of its natural vector and weed reservoir in India. Australasian Plant Pathology 44: 289-297.

Nagaich B B, Puri B K, Sinha R C, Dhingra M K, Bhardwaj V P. 1974. Mycoplasma-like organisms in plants affected with purple top-roll, marginal flavescence and Witches’-broom diseases of potato. Phytopathology Zeitschrift 81: 273-279.

Nakashima K, Hayashi T. 1995. Multiplication and distribution of rice yellow dwarf phytoplasma in infected tissues of rice and green leafhopper Nephotettix cincticeps. Annals of the Phytopathological Society of Japan 61: 451-455.

Nasu S, Sugiura M, Wakimoto T, Iida T. 1967. On the etiologic agent of rice yellow dwarf. Annals of the Phytopathological Society of Japan 33: 343-344.

Nielson M W. 1979. Taxonomic relationships of leafhopper vectors of plant pathogens. pp. 3-27. In: Maramorosch K, Harris KF. (eds.) Leafhopper vectors and plant disease Agents. London: Academic Press, New York.

Nielson M W. 1982. A revision of the subfamily Coelidiinae (Homoptera: Cicadellidae) IV. Coelidiini. Pacific Insects Monograph, 38: 1-318.

Oldfield G N, Kaloostian G H, Pierce H D, Calavan E C, Granett A L, Blue R L, Rana G L, and Gumpf D J. 1977. Transmission of Spiroplasma citri from citrus to citrus by Scaphytopius nitridus. Phytopathology 67: 763-765.

Oshima K, Shiomi T, Kuboyama T, Sawayanagi T, Nishigawa H. 2001. Isolation and characterization of derivative lines of the onion yellow phytoplasma that do not cause stunting or phloem hyperplasia. Phytopathology 91: 1024-1029.

Oshima K, Kakizawa S, Nishigawa H, Jung H Y, Wei W, Suzuki S, Arashida R, Nakata D, MiyataSI, Ugaki M, Namba S. 2004. Reductive evolution suggested from the complete genome sequence of a plant-pathogenic phytoplasma. Nature Genetics 36: 27-29.

Palermo S, Arzone A, Bosco D. 2001. Vector pathogen host plant relationships of chrysanthemum yellows (CY) phytoplasma and the vector leafhoppers Macrosteles quadripunctulatus and Euscelidius variegatus. Entomologica Experimentalis etApplicata 99: 347-354.

Pinzauti F, Trivellone V, Bagnoli B. 2008. Ability of Reptalus quinquecostatus (Hemiptera: Cixiidae) to inoculate stolbur phytoplasma to artificial feeding medium. Annals of Applied Biology 153 (3): 299-305.

Ponnamma K N, Rajeev G, Solomon J J. 1991. Detection of mycoplasma like organism in Proutista moesta (Westwood), a putative vector of yellow leaf disease of arecanut. Journal of Plantation crops 19(1): 63-65.

Ponnamma K N, Solomon J J. 1998. Yellow leaf disease of Areca palms- critical studies on transmission with the vector, Proutista moesta Westwood (Homoptera: Derbidae). Journal of Plantation Crops 26: 75-76.

Purcell A. 2013. Paradigms: examples from the bacterium Xylella fastidiosa. Annual Review of Phytopathology 51: 339-356.

Purcell A H. 1982. Insect vector relationships with prokaryotic plant pathogens. Annual Review of Phytopathology 20: 397-417.

Rangaswamy R S, Griffith AL. 1941. Demonstration of Jassus indicus (Walk.) as a vector of the spike disease of sandal (Santalum album Linn.). Indian Forester 67(8): 387-394.

Rajan P. 2011. Transmission of coconut root (wilt) disease through plant hopper, Proutista moesta Westwood (Homoptera: Derbidae). Pest Management in Horticultural Ecosystems 17(1): 1-5.

Rao G P, Kumar M. 2017. World status of phytoplasma diseases associated with eggplant. Crop Protection 96: 22-29.

Rao G P, Madhupriya, Tiwari A K, Kumar S, Baranwal VK. 2014. Identification of sugarcane grassy shoot associated phytoplasma and one of its putative vectors in India. Phytoparasitica 42: 349-354.

Rao G P, Nabi S U, Madhupriya. 2015. Overview on a century progress in research on sesame phyllody disease. Phytopathogenic Mollicutes 5(2): 74-83.

Redak R A, Purcell A H, Lopes J R S, Blua M J, Mizell III R S, Anderson P C. 2004. The biology of xylem fluid-feeding insect vectors of Xylella fastidiosa and their relation to disease epidemiology. Annual Review of Entomology 49: 243-270.

Salehi M, Izadpanah K, Nesbat E F. 1995. Etiology, transmission and host range of alfalfa Witches’ broom in southern Iran. Iranian Journal of Plant Pathology 31: 1-9.

Saponari M, Boscia D, Nigro F, Martelli G P. 2013. Identification of DNA sequences related to Xylella fastidiosa in oleander, almond and olive trees exhibiting leaf scorch symptoms in Apulia (southern Italy). Journal of Plant Pathology 95: 659-668.

Satta E, Paltrinieri S, Bertaccini A. 2019. Phytoplasma transmission by seed. In: Bertaccini A, Weintraub P G, Rao G P, Mori N. (eds.) Phytoplasmas: Plant Pathogenic Bacteria- II. Transmission and management of phytoplasma associated diseases. Springer Nature Singapore Pte Ltd. pp. 131-147.

Shaw ME, Kirkpatrick BC, Golino DA. 1993. The beet leafhopper-transmitted virescence agent causes tomato big bud disease in California. Plant Disease 77: 290-295.

Shivaramakrishnan V R, Sen-Sarma P K. 1978. Experimental transmission of spike disease of sandal, Santalam album, by the leaf-hopper Nephotettix virescens (Homoptera: Cicadellidae). Indian Forester 104: 202-205.

Sicard A, Zeilinger A R, Vanhove M, Shartel T E, Beal D J, Daugherty M P, Almeida R P P. 2018. Xylella fastidiosa: insights into an emerging plant pathogen. Annual Review of Phytopathology 56: 181-202.

Siddique A B M, Gurthrie JN, Walsh K B, White D T, Scott P T. 1998. Histopathology and within-plant distribution of the phytoplasma associated with Australian papaya die-back. Plant Disease 82: 1112-1120.

Singh S, Bhargava K S, Nagaich B B, Singh S. 1983. Lethality of the purple top roll pathogen (mycoplasma) to its vector Alebroides nigroscutellatus. Indian Phytopathology 36: 646-650.

Singh S, Nagaich B B. 1977. Alebroides dravidianus: a new vector for purple top roll and witches’ broom of potato. Journal of the Indian Potato Association 4: 71-73.

Singh V, Baitha A, Sinha O K. 2002. Transmission of grassy shoot disease of sugarcane by a leafhopper (Deltocephalus vulgaris Dash & Viraktamath). Indian Journal of Sugarcane Technology 17: 1-2.

Su C C, Shih H T, Lin Y S, Su W Y, Kao C W. 2011. Current status of Pierce’s disease of grape and its vector in Taiwan. Proceedings of the symposium on integrated management technology of insect vectors and insect-borne diseases, July 15, 2011, Taichung, Taiwan. Taiwan agricultural research institute, COA.pp. 25-50.

Su C C, Chang C J, Chang C M, Shih H T, Tzeng K C, Jan F J, Kao C W, Deng W L. 2013. Pierce’s disease of grapevines in Taiwan: Isolation, cultivation and pathogenicity of Xylella fastidiosa. Journal of Phytopathology 161: 389-396.

Subba Rao N, Viraktamath C A, Muniyappa V. 1988.Incidence of leafhoppers, treehoppers and froghopper (Homoptera) in sandal forests of Karnataka in relation to sandal spike disease. Annals of Entomology 6 (2): 25-34.

Suryanarayana V, Viraktamath C A, Reddy H R. 1998. Oviposition hosts of the leafhopper, Orosius albicinctus Distant - A vector of phytoplasma diseases of crop and weed plants. Pest Management in Horticultural Ecosystems 4: 11-15.

Suzuki S, Oshima K, Kakizawa S, Arashida R, Jung H Y, Yamaji Y, Nishigawa H, Ugaki M, Namba S. 2006. Interaction between the membrane protein of a pathogen and insect microfilament complex determines insect-vector specificity. Proceedings of National Academy of Sciences USA 103: 4252-4257.

Tanne E, Boudon-Padieu E, Clair D, Davidovich M, Melamed S, Klein M. 2001. Detection of phytoplasma by polymerase chain reaction of insect feeding medium and its use in determining vectoring ability. Phytopathology 91: 41-746.

Tedeschi R, Ferrato V, Rossi J, Alma A. 2006. Possible phytoplasma transovarial transmission in the psyllids Cacopsylla melanoneura and Cacopsylla pruni. Plant Pathology 55: 18-24.

Teixeira da Silva J A, Kher M M, Soner D, Natraj M. 2016. Sandalwood spike disease: a brief synthesis. Environmental and Experimental Biology 14: 199-204.

Tiwari A K, Kumar S, Mall S, Jadon V, Rao G P. 2017. New efficient natural leafhopper vectors of sugarcane grassy stunt phytoplasma in India. Sugar Technology 19 (2): 191-197.

Triplehorn CA, Johnson NF. 2005. Borror and DeLobg’s introduction to the study of Insects, 7th edition. Thompson, Brooks/Cole x+864pp.

Tuan S J, Hu F T, Chang H Y, Chang P W, Chen Y H, Huang T P. 2016. Xylella fastidiosa transmission and life history of two Cicadellinae sharpshooters, Kolla paulula and Bothrogonia ferruginea (Hemiptera: Cicadellidae), in Taiwan. Journal of Economic Entomology 109: 1034-1040.

Viraktamath C A, Anantha Murthy H V. 2014. Review of the genera Hishimonus Ishihara and Litura Knight (Hemiptera: Cicadellidae) from the Indian subcontinent with description of new species. Zootaxa 3785(2): 101-138.

Viraktamath C A. 1989. Auchenorrhyncha (Homoptera) associated with mango, Mangifera indica L. Tropical Pest Management 35: 431-434.

Wallace JM, Murphy AM. 1938. Studies on the epidemiology of curly top in southern Idaho, with special reference to sugar beets and weed hosts of the vector Eutettix tenellus. USDATechnical Bulletin 624: 46.

Wayadande A C. 1994. Electronic monitoring of leafhoppers and planthoppers: feeding behavior and application in host-plant resistance studies. Pp. 66-105. Ellsbury MM, Backus EA, Ullman DL. (eds.) History, Development, and Application of AC Electronic Insect Feeding Monitors. Thomas Say Publications in Entomology, Entomological Society of America, Lanham, Maryland.

Wayadande A C, Baker G R, Fletcher J. 1997. Comparative ultrastructure of the salivary glands of two phytopathogen vectors, the beet leafhopper, Circulifer tenellus (Baker) and the corn leafhopper Dalbulus maidis DeLong and Walcott (Homoptera: Cicadellidae). International Journal of Insect Morphology and Embryology 26: 113-120.

Webb M D. 1986. Sugarcane cicadellids of the genus Yamatotettix (Homoptera: Auchenorrhyncha). Journal of Natural History 20: 131-141.

Weintraub P G, Beanland L A. 2006. Insect vectors of phytoplasmas. Annual Review of Entomology 51: 91-111.

Weintraub P G, Pivonia S, Rosner A, Gera A. 2004. A new disease in Limonium hybrids. II. Insect vectors. HortiScience 39: 1060-1061.

Weintraub P G, Trivellone V, Kruger K. 2019. The biology and ecology of leafhopper transmission of phytoplasmas. pp. 27-51. In: Bertaccini A, Weintraub PG., Rao GP, Mori N. (eds.) Phytoplasmas: plant pathogenic bacteria-II. Transmission and management of phytoplasma-associated diseases. Springer Nature Singapore Pte Ltd.

Wilson M R, Turner J A. 2010. Leafhopper, Planthopper and Psyllid Vectors of Plant Disease. Amgueddfa Cymru - National Museum Wales. Available from: http://naturalhistory.museumwales.ac.uk/Vectors. [Accessed: 6 June 2020].

Wilson M R, Claridge M F. 1985. The leafhopper and planthopper faunas of rice fields. pp. 381-404. Nault L R, Rodriguez J G. (eds.) The leafhoppers and planthoppers. John Wiley & Sons.

Zahniser J N, Dietrich C H. 2008. Phylogeny of the leafhopper subfamily Deltocephalinae (Insecta: Auchenorrhyncha: Cicadellidae) and related subfamilies based on morphology. Systematics and Biodiversity 6(1): 1-24.

Zhang J, Miller S, Hoy C, Zhou X, Nault L. 1998. A rapid method for detection and differentiation of aster yellows phytoplasma-infected and inoculative leafhoppers. Phytopathology 88: S84.

Zhang H, Zhang Y, Duan Y. 2019. DNA bar coding of Deltocephalus Burmeister (Cicadellidae, Deltocephalinae, Deltocephalini) in China. Zookeys 867: 55-71.