Scientist Profile

Photo

Pepito Q. Cabauatan

Expertise: Plant Pathology, Bacteriology, Virology

Affiliation

Senior Associate Scientist, International Rice Research Institute , Plant Breeding Genetics and Biotechnology Division, Los Baños, College, Laguna

Association

    • Philippine Phytopathological Society, Member
    • IRRI Filipino Scientists Association (Formerly IRRI Junior Researcher Inc.), Member
    • National Research Council of the Philippines (NRCP), Member

Employment

    • EPPD, IRRI, Assistant Scientist II, 1998 Ja - 1998 D
    • EPPD, IRRI , Assistant Scientist, 1991 - 1997
    • EPPD, IRRI , Senior Research Assistant, 1984 - 1990
    • EPPD, IRRI , Research Assistant, 1975 - 1983
    • UPLB , Instructor, Department of Life Sciences,, 1972 - 1975

Award

    • Best Paper Award (co-author), Crop Science Society of the Philippines , 2002 Ap 23-26
    • Excellence Award, IRRI, 1999 D 10
    • Nominee, 1999 CGIAR Chairman's Award for Outstanding Local Scientist, CGIAR , 1999
    • Recipient of the Japan Society for the Promotion of Science Fellowship for Ph.D Dissertation Program, Japan Society, 1994 Mr
    • Special Achievement Award, IRRI, 1993 D
    • Special Achievement Award "For isolating strains of rice tungro bacilliform virus", IRRI, 1993 D
    • Best Poster Paper Award in Plant Pathology, Pest Management Council of the Philippines, 1989 My
    • Outstanding Performance Award (1980 - 1985), IRRI, 1985 D
    • 1st Gintong Ani Award for Outstanding Performance as a Junior Researcher, IRRI Junior Researcher Association (IJR), 1986 F
    • Best Paper Award in Plant Pathology, Pest Management Council of the Philippines, 1978 My

Research

    • Different aspects of rice diseases caused by viruses and mycoplasma-like organism (MLO)
    • Virus/ vector interaction
    • Identification and characterization of rice viruses and their strains
    • Purification and serology of rice viruses
    • Development of protein/nucleic acid-based methods for virus/MLO detection
    • Molecular cloning and nucleotide sequencing of rice viruses
    • Studies on the mechanism of resistance to rice viruses
    • Screening for resistance to rice viruses
    • Studies on the genetic diversity of rice tungro viruses

Papers Presented

    • Monoclonal antibodies for detection of rice viruses: grassy stunt, stripe, dwarf, gall dwarf and ragged stunt. , Biotechnology for Biological Control of Pests and Vectors
    • The genetic and biological diversity of rice tungro viruses. In: The Rice Tungro Virus Disease - A Paradigm in Disease Management. , Science City of Munoz, Nueva Ecija. Philipppine Rice Research Institute and Honda Research Institute, Japan Co. Ltd
    • Rice viruses transmitted by the brown planthopper Nilaparvata lugens Stahl, Planthoppers: new threats to the sustainability of intensified rice production system in Asia. Los Banos (Philippines): International Rice Research Institute
    • Etiology and strain characterization of rice virus diseases in the Philippines. , Faculty of Agriculture, Hokkaido University, Sapporo, Japan.
    • Characterization of a "tungro-like" disease of rice transmitted by the brown planthopper, Nilaparvata lugens (Stal.) in the Philippines., University of the Philippines at Los Banos, College,Laguna
    • Overview of rice tungro virus research in IRRI. , International Symposium on Molecular Biological Approaches on Resistance to Virus Disease in Rice, RDA, Korea: National Yeongnam Agricultural Experiment Station.
    • Sustaining rice production by tapping hidden genes from wild species for tolerance to biotic and abiotic stress. , 32nd annual Scientific Conference of the Crop Society of the Philippines, Bohol Tropics Resort, Tagbilaran City, Bohol, Philippines.
    • Comparative analysis of gene expression profiles from rice plants in response to infection with rice tungro spherical virus, Crop Functional Genomics Symposium at Ramada Plaza Jeju, Jeju, Korea
    • Integrated location/expression candidate approach for analysis of RTSV resistance. , 5th International Rice Genetics Symposium, EDSA Shangri-la Hotel, Manila, Philippines.
    • Alternative diagnostic methods for the detection of rice tungro viruses. , Int. Workshop on Rice Tungro Disease Management, Alor Setar, Malaysia.
    • Tolerance of rice varieties to tungro disease and its possible use for disease management, Workshop on Rice Tungro Virus. Maros, Indonesia
    • Dependent transmission of rice tungro bacilliform virus on rice tungro spherical virus by a vector leafhopper, Proceedings of the Symposium on Transmission of Viruses by Plant and Animal Vectors. Fukuoka, Japan
    • Life span of and tungro transmission by viruliferous Nephotettix virescens on 10 rice varieties at IRRI, Philippines, , Report of the rice tungro collaborative project. IRRI, Los Banos, Laguna.
    • Indexing rice yellow dwarf pathogen (mycoplasma-like organisms) by nucleic acid hybridization-based assay. , IRRI - Japan Shuttle Research Project Report, JIRCAS, Tsukuba, Japan.
    • Strains of rice tungro viruses, 6th International Congress of Plant Pathology, Montreal, Canada
    • Nucleic acids of rice tungro bacilliform and spherical viruses. , Annual Meeting of the Phytopathological Society of Japan, Matsuyama, Japan.
    • Genetic variability of rice tungro bacilliform virus in the Philippines, Indonesia, and Vietnam. , Annual Meeting of the International Program on Rice Biotechnology, Malacca, Malaysia
    • Purification, serology and properties of rice tungro-associated viruses. , 5th Int. Congress of Plant Pathology, Kyoto, Japan.
    • Rice tungro-associated viruses: Transmission, isolation, purification and serology, International Congress of Plant Protection, Manila, Philippines
    • Molecular characterization of two rice tungro spherical virus strains and their distribution in the Philippines and Indonesia. , Annual Meeting of The International Program on Rice Biotechnology, Malacca, Malaysia.
    • Resistance to tungro disease. , 5th Int. Congress of Plant Pathology. Kyoto, Japan.

Education

    • Hokkaido University, Sapporo, Japan, Ph.D. in Plant Pathology (Virology), 1998
    • University of the Philippines, Los Banos, Laguna, M. Sc. in Plant Pathology (Virology), 1983
    • University of the Philippines, Los Banos, Laguna, B. S. A. Plant Pathology (Bacteriology), 1972

Publication

    • Cabauatan, P.Q., Melcher, U., Ishikawa, K., Omura, T., Hibino, H., Koganezawa, H., Azzam, O., (1999) Sequence changes in six variants of rice tungro bacilliform virus and their phylogenetic relationships
    • Journal of General Virology Volume 80
    • Cabauatan, P.Q, Arboleda, M., Azzam, O., (1998) Differentiation of rice tungro bacilliform virus strains by restriction analysis and DNA hybridization
    • J. Virol. Methods Volume 76
    • Cabauatan, P.Q., Cabunagan, R.C., and Koganezawa, H. , (1995) Biological variants of rice tungro viruses in the Philippines
    • Phytopathology Volume 85
    • Cabauatan, P.Q., Kobayashi, N., Ikeda, R., Koganezawa, H., (1993) Oryza glaberrima: an indicator plant for rice tungro spherical virus.
    • International Journal of Pest Management Volume 39
    • Cabauatan, P.Q., Hibino, H., (1988) Isolation, purification and serology of rice tungro bacilliform and rice tungro spherical viruses
    • Plant Disease Volume 72
    • Cabauatan, P.Q., Hibino, H., (1983) An unknown disease of rice transmitted by the brown planthopper, Nilaparvata lugens (Stal.) in the Philippines
    • International Rice Research Newsletter Volume 8, No. 2
    • Cabauatan, P.Q., Ling, K.C., (1979) Acquisition of rice tungro virus through parafilm membrane by Nephotettix virescens
    • International Rice Research Newsletter Volume 4, No. 4
    • Cabauatan, P.Q., Encabo, J.R., Cabunagan, R.C., Satoh, K., Lee, J.H., Kwak, D.Y., De Leon, T.B., Macalalad, R.A., Kondoh, H., Kikuchi, S., Choi, I.R., (2009) Suppression of two tungro viruses by separable traits originating from cultivar Utri Merah
    • MPMI Volume 22
    • Cabauatan, P.Q., Zenna, N.S., Baraoidan, M., Leung, H., Choi, I.R. , (2008) Characterization of a putative rice mutant for reaction to rice tungro disease
    • Crop Science Volume 48
    • Du, P.V., Cabunagan, R.C., Q. Cabauatan, P.Q., S. Choi, H.S., Choi, I.R., Chien, H. V., Huan, N.H., (2007) Yellowing syndrome in rice: etiology, current status, and future challenges
    • Omonrice Volume 15
    • Cabauatan, P.Q., Shibata, Y., Cabunagan, R., Choi, I.R. , (2007) Characterization of Oryza rufifogon-derived resistance to tungro disease in rice
    • Plant Disease Volume 91
    • Cabauatan, P.Q., Isogai, M., Masuta, C., Uyeda, I., Azzam, O., (2000) Complete nucleotide sequence of rice tungro spherical virus genome of a highly virulent strain Vt6
    • Virus Genes Volume 20, No. 1
    • Cabauatan, P.Q., Duan, Y.P., Sta. Cruz, F.C., Tiongco, E.R., Hibino, H., (1993) Enzyme-linked immunosorbent assay of rice tarsonemid mite virus in mites and rice tissues
    • J. Plant Prot. Tropics Volume 10, No. 1
    • Cabauatan, P.Q., Hibino, H., (1987) Infectivity neutralization of rice tungro-associated viruses acquired by vector leafhoppers
    • Phytopathology Volume 77
    • Cabauatan, P.Q., Hibino, H., Omura, T., and Tsuchizaki, T. , (1985) Rice grassy stunt virus strain causing tungro-like symptom in the Philippines.
    • Plant Disease Volume 69
    • Cabauatan, P.Q., Miranda, G., Yambao M.L.M., Venkitesh, S.R., Koganezawa, H., (1995) Degradation of a coat protein of rice tungro spherical virus
    • Annals of Phytopathological Society of Japan Volume 61
    • Cabauatan, P.Q., Takahashi, Y., Tiongco, E.R., Koganezawa, H., Hibino, H. and Omura, T. , (1993) Detection of rice tungro bacilliform virus by polymerase chain reaction for assesing mild infection of plants and viruliferous leafhoppers.
    • Phytopathology Volume 83
    • Cabauatan, P.Q., Hsu, H.T., Hibino, H., (1990) Development of serological procedures for rapid, sensitive, and reliable detection of rice grassy stunt virus
    • Plant Disease Volume 74
    • Cabauatan, P.Q., Hibino, H., Daquioag, R.D., and Dahal, G. , (1988) Resistance to rice tungro spherical virus in rice.
    • Plant Disease Volume 72
    • Cabuatan, P.Q., Hibino, H., Ishikawa, K., Omura T., Koganezawa, H., (1991) Characterization of rice tungro bacilliform and rice tungro spherical viruses
    • Phytopathology Volume 81
    • Cabauatan, P.Q., Murao, K., Uyeda, I., Ando, Y., Kimura, I., Koganezawa, H., (1996) Genomic rearrangement in genome segment 12 of rice dwarf phytoreovirus
    • Virology Volume 216
    • Cabauatan, P.Q., Suga, H., Uyeda, I., Yan, J., Murao, K., Kimura, I., Tiongco, E.R., Koganezawa, H., (1995) Heterogeneity of rice ragged stunt oryzavirus genome segment 9 and its segregation by insect vector transmission
    • Arch. Virol. Volume 140
    • Cabauatan, P.Q., Kano, M., Koizumi, M., Noda, H., Hibino, H., Ishikawa, K., Omura, T., Koganezawa, H., (1992) Nucleotide sequence of capsid protein gene of rice tungro bacilliform virus
    • Arch. Virol. Volume 124
    • Cabauatan, P.Q., Lee, J.H., Muhsin, M., Atienza, G.A., Kwak, D.Y., Kim, S.M., de Leon, T.B., Angeles, E.R., Coloquio, E., Kondoh, H., Satoh, K., Cabunagan, R.C., Kikichi, S., Leung, H., Choi, I.R., (2010) Single nucleotide polymorphism in a gene for translation initiation factor (eIF4G) of rice associated with resistance to rice tungro spherical virus
    • MPMI Volume 23, No. 1
    • Cabauatan, P.Q., Cabunagan, R.C., Sta.Cruz, F.C., Koganezawa, H., (1994) Occurrence of rice dwarf virus in the Philippines.
    • Philippine Phytopathology Volume 30
    • Cabauatan, P.Q., Hibino, H., (1985) Transmission of rice tungro bacilliform and spherical viruses by Nephottetix virescens
    • Philippine Phytopathology Volume 21
    • Cabauatan, P.Q., Hibino, H., Lapis, D.B., Omura, T., Tsuchizaki, T., (1985) Rice grassy stunt virus 2: a new strain of rice grassy stunt in the Philippines
    • IRRI Research Paper Series Volume 106
    • Cabauatan, P.Q., Karganilla, A.D., (1973) Bacterial leaf stripe of corn in the Philippines
    • Philippine Agriculturist Volume 58
    • Cabauatan, P.Q., Ling, K.C., Tiongco, E.R., Aguiero, V.M., (1978) Rice ragged stunt disease in the Philippines
    • IRRI Research Paper Volume 16
    • Cabauatan, P.Q., Ling, K.C., Tiongco, E.R., Aguiero, V.M., (1978) Rice ragged stunt disease in the Philippines
    • Philippine Phytopathology Volume 14
    • Cabauatan, P.Q., Ling, K.C., Distaphorn, S., Anjaneyulu, A., Miah, S.A., Rao, P.S., John, V.T., Parejarearn, A., Nahar, M.A., Koesnang, S., Ghosh, A., Tiongco, E.R., Flores, Z.M., (1980) Report of the 1979 rice tungro collaborative project
    • IRRI
    • Cabauatan, P.Q., Azzam, O. , (1998) Mechanism of resistance to rice tungro spherical virus
    • International Rice Research Notes Volume 23, No. 2
    • Cabauatan, P.Q., Koganezawa, H., (1994) Leafhopper transmission of the Philippine isolate of rice dwarf virus
    • International Rice Research Notes Volume 19, No. 2
    • Cabauatan, P.Q., Cabunagan, R.C., Koganezawa, H., (1994) Comparative transmission of two strains of rice tungro spherical virus in the Philippines.
    • International Rice Research Notes Volume 19, No. 2
    • Cabauatan, P.Q., Koganezawa, H., (1994) Symptomatic strains of rice tungro bacilliform virus.
    • International Rice Research Notes Volume 19, No. 2
    • Cabauatan, P.Q., Koganezawa, H., Tsuda, S., Hibino, H., (1994) Applying rapid immunofilter paper assay to detect rice viruses.
    • International Rice Research Notes Volume 19, No. 2
    • Cabauatan., P.Q., Koganezawa, H., (1993) IRGC 100139, an accession of Oryza glaberrima sensitive to rice tungro spherical virus (RTSV)
    • International Research Notes Volume 18, No. 1
    • Cabauatan, P.Q., Koganezawa, H., Cabunagan, R.C., Sta. Cruz, F.C., (1993) Rice dwarf, a new virus disease in the Philippines
    • International Rice Research Notes Volume 18, No. 1
    • Cabauatan, P.Q., Hibino, H., Hsu, H.T., (1988) Dotblot immunoassay for detecting rice grassy stunt virus in infected tissues.
    • International Rice Research Newsletter Volume 13, No. 4
    • Cabauatan, P.Q., Hibino, H., (1984) Incidence of rice tungro bacilliform and rice tungro spherical viruses on susceptible rice cultivars.
    • International Rice Research Notes Volume 9, No. 3
    • Cabauatan. P.Q., Hibino, H., (1984) Detection of spherical and bacilliform virus particles in tungro-infected rice plants by leafhopper transmission
    • International Rice Research Newsletter Volume 9, No. 1
    • Cabauatan, P.Q., Ling, K.C., (1978) A study of vein swellings on rice plants infected with rice ragged stunt virus
    • International Rice Researh Newsletter Volume 3, No. 2
    • Cabauatan, P.Q., Yambao, M.L.M., Azzam, O., (1998) Molecular differentiation of two rice tungro spherical virus variants.
    • International Rice Research Notes Volume 23, No. 2
    • Cabauatan, P.Q., Nakashima, K., Koganezawa, H., (1993) Use of DNA probes to distinguish mycoplasma-like orgnisms ( MLOs ) of yellow dwarf and orange leaf ( ROL ) in rice
    • International Rice Research Notes Volume 18, No. 4
    • Cabauatan, P.Q., Daquioag, R.D., Hibino, H., (1986) Balimau Putih- cultivar tolerant of rice tungro-associated viruses
    • International Rice Research Newsletter Volume 11, No. 6
    • Cabauatan, P.Q., Hibino, H., (1985) Purification and serology of rice tungro spherical virus
    • International Rice Research Newsletter Volume 10, No. 4
    • Cabauatan, P.Q., Daquioag, R.D., Hibino, H., (1985) Reaction of IR varieties to rice tungro complex under greenhouse and field conditions as detected by latex test.
    • International Rice Research Newsletter Volume 10, No. 2
    • Cabauatan, P.Q., Aguiero, V.M., Hibino, H., (1984) A new possible source of resistance to rice grassy stunt virus
    • International Rice Reserach Newsletter Volume 9, No. 3
    • Cabauatan, P.Q., Hibino, H., Omura, T., Tsuchizaki, T., (1983) Purification and serological properties of rice grassy stunt virus 2.
    • International Rice Research Newsletter Volume 8, No. 6
    • Cabauatan, P.Q., Hibino, H., (1983) Serological relations between rice grassy stunt and unknown disease of rice transmitted by Nilaparvata lugens(Stal.) in the Philippines
    • International Rice Research Institute Volume 8, No. 2
    • Cabauatan, P.Q., Dolores-Talens, A.C., Escara-Wilke, J.R., Nelson, R.J., Koganezawa, H., (1994) Strain differentiation of rice tungro bacilliform virus by restriction fragment length analysis of polymerase chain reaction-amplified product
    • International Rice Research Notes Volume 19, No. 1
    • Cabauatan, P.Q., Nakashima, K., Koganezawa, H., (1992) Detection of the Philippine isolate of rice yellow dwarf ( RYD ) agent using DNA probes
    • International Rice Research Notes Volume 17, No. 2
    • Cabauatan, P.Q., Hibino, H., (1989) Avidin-biotin ELISA for sensitive detection of rice tungro-associated viruses
    • Philippine Phytopathology Volume 25
    • Cabauatan, P.Q., Hibino, H., (1987) Isolation, purification, and serology of rice tungro-associated viruses
    • Philippine Phytopathology Volume 23
    • Cabauatan, P.Q., Hibino, H., (1986) A modified dot immunobinding assay for the detection of rice grassy stunt virus in infected tissues
    • Philippine Phytopatholology Volume 22
    • Cabauatan, P.Q., Hibino, H., (1984) Transmission of rice tungro bacilliform and spherical viruses by Nephottetix virescens
    • Philippine Phytopatholology Volume 20
    • Cabauatan, P.Q., Hibino, H., Lapis D.B., Omura, T., Tsuchizaki, T., (1984) Rice grassy stunt virus 2: a new strain of rice grassy stunt in the Philippines
    • Philippine Phytopathology Volume 20
    • Cabauatan, P.Q., Hibino, H., (1982) An unknown disease of rice transmitted by the brown planthopper, Nilaparvata lugens (Stal.) in the Philippines
    • Philippine Phytopathology Volume 8
    • Cabauatan, P.Q., Hibino, H., (1986) Application of monoclonal antibody on serodiagnosis of rice grassy stunt virus
    • Philippine Phytopathology Volume 22
    • Cabauatan, P.Q., Hsu, H.T., Hibino, H., (1986) Mouse monoclonal antibody to rice grassy stunt virus and its use for disease detection
    • Phytopathology Volume 76
    • Cabauatan, P.Q., Hibino, H., (1986) Infectivity neutralization of rice tungro- associated viruses acquired by vector leafhoppers
    • Philippine Phytopathology Volume 76
    • Cabauatan, P.Q., Daquioag, R.D., Hibino, H., (1986) Tolerance of Balimau Putih to RTV- associated viruses
    • Philippine Phytopathology Volume 22
    • Cabauatan, P.Q., Hibino, H., (1985) Serological blockage of RTV complex transmission by the green leafhopper, N. virescens
    • Philippine Phytopathology Volume 21
    • Cabauatan, P.Q., Daquioag, R.D., Hibino, H., (1985) TKM 6- a source of resistance to rice tungro spherical virus
    • Philippine Phytopathology Volume 21
    • Cabauatan, P.Q., Daquioag, R.D., Hibino, H., (1984) Reaction of IR varieties to rice tungro virus complex under greenhouse and field conditions as detected by latex test
    • Philippine Phytopathology Volume 20
    • Cabauatan, P.Q., Tiongco, E.R., Ling, K.C., (1979) Studies on host range of rice ragged stunt virus
    • Philippine Phytopathology Volume 15
    • Cabauatan, P.Q., Ling, K.C., (1979) Varietal resistance to rice ragged stunt virus and to its vector
    • Philippine Phytopathology Volume 15
    • Cabauatan, P.Q., Daquioag, R.D., Mesina, E., Hibino, H., (1986) Reaction of selected resistant varieties to tungro associated-viruses
    • Philippine Phytopathology Volume 22
    • Cabauatan, P.Q., Bajet, N.B., Daquioag, R.D., Hibino, H., (1985) Concentration of rice tungro spherical virus in tungro-infected rice
    • Philippine Phytopatholology Volume 21
    • Cabauatan, P.Q., Ling, K.C., Tiongco, E.R., Aguiero, V.M., (1978) Rice ragged stunt disease in the Philippines-Symptomatology, transmission and causal agent
    • Philippine Phytopathology Volume 14

Trainings

    • Purification and serology of rice grassy stunt virus, 1983 Mr, National Agriculture Research Center, Tsukuba, Japan
    • Production and handling of monoclonal antibodies, American Type Culture Collection, 1985 S - O, Rockville, Maryland, USA
    • Application of monoclonal antibodies for the detection of rice grassy stunt virus, 1988 Je, USDA, Beltsville, Maryland, USA
    • Molecular analysis of rice tungro bacilliform virus, 1989 O - 1990 Mr, National Institute of Agrobiological Research, Tsukuba, Japan
    • Survey and identification of rice yellow mottle virus, 1991 Ja - Mr, IRRI Outreach Station, Antananarivo, Madagascar
    • Purification of rice yellow dwarf (RYD) MLO and application of cDNA probes for RYD detection, 1991 N, Japan International Research Center for Agricultural Sciences, (JIRCAS), Tsukuba, Japan
    • Purification of rice orange leaf MLO and testing specificity of cDNA probes for RYD, 1992 Jl - Ag, JIRCAS, Tsukuba, Japan
    • Molecular analysis of rice tungro bacilliform virus strains, 1994 S - N, National Agriculture Research Center, Tsukuba, Japan
    • Molecular cloning and nucleotide sequencing of ds-RNAs of the Philippine isolate of rice dwarf virus, 1994 Je - S, Faculty of Agriculture, Hokkaido University, Sapporo, Japan
    • Molecular diagnosis and DNA sequencing of rice tungro bacilliform virus strains, 1996 O, National Agriculture Research Center, Tsukuba, Japan
    • Molecular cloning & nucleotide sequencing of cDNAs of rice tungro spherical virus strains A & Vt6., 1997 Je - S, Faculty of Agriculture, Hokkaido University, Sapporo, Japan
    • Technical Writing for IRRI Professional/Supervisory Research Personnel, 1992 Ap, Institute of Development Communication, UPLB and HRD/IRRI
    • Radiation Safety Course, 1996 F, Philippine Nuclear Research Institute/ IRRI
    • Management Skills Program, Mindbroker Corporation/IRRI, 2000 Je 20 - 21, Le Bea Resort, Bagong Kalsada, Calamba, Laguna
    • Management Skills Program II, Mindbroker Corporation/IRRI, 2000 Ag 16 - 18, Fontana Resort and Country Club, Angeles, Pampanga
    • Asian Rice Biotechnology Network Microarray and Bioinformatics Workshop, 2001 D 3 - 7, International Rice Research Institute
    • Molecular characterization of rice tungro biological variants, 1999 My, Division Seminar, Entomology and Plant Pathology Division
    • Knowledge-based tech on rice virus diseases & their app to rice tungro disease research & mgnt, 1999 F, IRRI (Grade level 7) Special Seminar
    • Etiology and Strain Characterization of Rice Virus Diseases in the Philippines, 1998 Ag, Hokkaido University, Sapporo, Japan
    • "Oryza glaberrima, an Indicator Plant for Rice Tungro Viruses", 1994 My, Scientific Meeting of the Pest Management Council of the Philippines (PMCP)
    • Alternative Diagnostic methods for the Detection of Rice Tungro Viruses, 1993 N, Int Workshop On Rice Tungro Disease Management, Alor Setar, Malaysia
    • Rice Dwarf, a New Virus Disease in the Philippines, 1993 My, 30th Annual Meeting of the Philippine Phytopathological Society (PPS), Cebu City
    • Avidin-biotin ELISA for Sensitive Detection of Rice Tungro Viruses, 1989 My, 26th Annual Meeting of the PPS, Baguio City
    • Monoclonal Antibodies for the Detection of Rice Grassy Stunt Virus in the Philippines, 1988 Je, Conf. on Biotech for Health and Agriculture,National Academy of Sciences, Washington, D. C., USA
    • Isolation, Purification, and Serology of Rice Tungro- Associated Viruses, 1987 My, 24th Annual Meeting of the PPS. Davao City
    • Rice Tungro-Associated Viruses: Transmission, Isolation, Purification, and Serology, 1987 O, Int. Congress of Plant Protection Manila, Philippines
    • Application of Monoclonal Antibody on Serodiagnosis of Rice Grassy Stunt Virus, 1986 My, 23rd Annual Meeting of the PPS, Iloilo City
    • Rice Grassy Stunt Virus 2: a New Strain of Rice Grassy Stunt in the Philippines, 1984 My, 21st Annual Meeting of the PPS. Los Banos, Laguna
    • RGSV2: A Strain of Rice Grassy Stunt Virus, 1983 Ag, IRRI Saturday Seminar IRRI
    • An Unknown Disease of Rice Transmitted by Nilaparvata lugens in the Philippines, 1982 My, 19th Annual Meeting of the PPS, Baguio City
    • Rice Tungro Collaborative Report, 1979 Ap, International Rice Research Conference, IRRI
    • "Rice Ragged Stunt Disease in the Philippines", 1978 My, 15th Annual Meeting of the PPS, Holiday Inn Hotel, Manila