Scientist Profile

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Ponciano S.M. Halos

Plant Pathologist, Outstanding Young Scientist (1983)

Expertise: Plant Pathology, Mango Fruit Rots, Plant Diseases Control, Phytopathology

Dr. Ponciano Halos is recognized of his various researches in plant pathology – his study on mango fruit rots helped pave the way for the exportation of blemish-free mangoes; his pioneering work on the interaction of endomycorrhizas and rhizobia in plants; for integrated approaches in controlling plant diseases; and the successful publication of a useful reference book on Philippine phytopathology.

Affiliation

Scientist, Institute of Biology, College of Science, University of the Philippines , Diliman, Quezon City

Association

    • UP Phytopatological Society, President
    • UPCA SBO, Councilor
    • Pedro Guevarra Memorial High School Alumni Association, Board of Director
    • Cursillo Class 179, Member
    • ZYO Fraternity and YZO Sorrority, Adviser
    • Pest Control Council of the Philippines, Inc, President
    • Phi Sigma Bilogical Honor Society Inc, President
    • University of California Alumni Association of the Philippines, Member
    • UP Zeta Psi Omicron, Adviser
    • Pesticide Technical Committee,Gulayan sa Kalusugan, Chairman
    • Agricultural Science Philippine Association, Vice- President

Employment

    • UPLB College of Agriculture, Graduate Research Fellow, 1968 Jl 1-1970 Je 30
    • UPLB College of Agriculture, Basic Microbiology and Plant Pathology, 1967 O- 1970 Je
    • UPLB College of Agriculture, Assistant Professor of Plant Pathology, 1975 My 19
    • Monsanto Philippines, Product Development Executive, 1982 Ap-1982 N
    • Monsanto Philippines, Product Development Manager, 1982 D
    • Delaware, U.S.A. Montedison, Milan Italy, Consultant

Award

    • Outstanding Young Scientist Award (Plant Pathology), National Academy of Science and Technology (NAST) -DOST, 1983
    • Dedicated Service as Editor-in-Chief of Philippine :Phytopathology Journal from 1975-1978, PCCP, 1975-1978
    • Professorial Chair Holder in Plant Pathology, SEARCA , 1980
    • Scholarship for Study Tour on Pesticide, USAID/KSU/NEDA, 1979

Research

    • Synergism between endomycorrhizas, rhizobium japonicum CB 1809 and soybean (Glycine max(1) Merr [Completed]
    • Endomycorrhizas as for increased agricultural crop production [Completed]
    • Development of control strategies against major fungal diseases of abaca [Completed]
    • Movement, degradation, persistence and environmental impact of some soil treatment fungicides [Completed]
    • Forecasting the prevalance and integrated control of potato late blight [Completed]

Papers Presented

    • Chemical control of Cercospora leaf mold of tomato, 11th National Conference of the Pest Control Council of the Philippines Cebu City
    • Phytotoxicity of Filtrates from Cultures of Stagonospora Sacchari Lo And Ling, 8th National Conference of the Pest Control Council of the Philippines
    • Chemical Control of Downy Mildew on Watermelon , NCPC Reports
    • Induction of An Antifugal Compound in Phaseolus Vulgaris, 8th Annual Meeting of the Crop Science Society of the Philippines
    • Comparison of Glyphosate Efficacy with Conventional and LVS Application Equipment Under Open Conditions, 17th Anniversary and Annual Convention of the Pest Control Council of the Philippines Inc.Iloilo City
    • Imperata Cylindrica Control by Various Rates of Mon 8793 under Open Conditions, 18th Anniversary and Annual Convention of the Pest Control Council of the Philippines Inc. Iloilo City
    • Broadleaf Herbicide Mixtures in Transplanted and pre Germinated Puddle Sown Rice, 17th Anniversary and Annual Convention of the Pest Control Council of the Philippines Inc. Iloilo City
    • Glyphosate Mixtures for Weed Control in banana Plantations, 17th Anniversary and Annual Convention of the Pest Control Council of the Philippines Inc. Iloilo City
    • Alachlor Mixtures for Wed Control in Hybrid Corn, 17th Anniversary and Annual Convention of the Pest Control Council of the Philippines Inc.Iloilo City
    • Roundup for General Weed Control in Banana Plantations, 10th Conference of the Asian Pacific Weed Science Society
    • Comparison of Glyphosate Efficay with Conventional and LVS Application Equipment Under Shade Conditions, 17th Anniversary and Annual Convention of the Pest Control Council of the Philippines, Inc.
    • Studies on Sprinkle Bottle Method of Application for Machete and Rogue Herbicides in Transplanted and Puddle Sown Rice in Southeast Asia, 10th Conference of the Asian Pacific Weed Science Society Chiangmai, Thailand
    • Chemical Control of Cabbage Bottom rot, 11th National Conference of the Pest Control Council of the Philippines
    • Chemical Control of Mungbean Rust and Powdery Mildew, NCPC Reports

Education

    • University of California, Berkeley, California, USA, Ph.D. in Plant Pathology, 1975
    • University of the Philippines at Los Ba?os (UPLB), College, Laguna, M.S. in Agriculture, 1970
    • UPLB, College, Laguna, B.S. Agriculture, 1967

Publication

    • Begonia, D., Catedral, I.C., Torres, C., Halos, P.M. , (1975) Uptake of Helminthosporium sorglicola toxin and permeability changes induced in sorghum and mungbean
    • Philippine Journal of Biology Volume 7
    • Halos, P.M., Luis, E.M., Borja, M.S., (1982) Synergism between endomycorrhizas, rhizobium,japonicum strain CB and soybean
    • Philippine Agriculturist Volume 65
    • Halos, P.M., Divinagrracia, G.G., (1971) Pycnidial and pycnidiospore production by Diplodia natalensis
    • Philippine Phytopathology Volume 7
    • Halos, P.S.M. et al., (1998) Biodegradation of crude oil using microorganisms from Pasig and Manila Bay
    • Transactions of the National Academy of Science and Technology Volume 20
    • Halos, P.M., (1981) Endomycorrhizas for increased agricultural crop production
    • Plant Pathology Auditorium UPBL, College Laguna
    • Lim, S.T., Halos, P.S.M., (1995) Isolation, characterization and determination of bioremediation potential of oil egrading bacteria from the Manila Bay
    • The Philippine Journal of the Biotechnology Volume 6, No. 1
    • Ordonia, V.G., Gonzales, J.L., Rodil, A., Halos, P.M. , (1978) Induction of an anti fungal substance in Phaseolus vulgaris by Helminthosporium maydis
    • Philippine Journal of Biology Volume 7
    • Halos, P.M., Zorilla, R.A., (1979) Vesicular arbuscular mycorrhizae increase growth and yield of tomatoes and reduce infection by Pseudomonas solanacearum
    • Philippine Agriculturist Volume 62
    • Juanillo, C.D., Halos, P.M., Aycardo, H. , (1980) Screening for Fusarium wilt and dry root rot resistance in cowpeas
    • Philippine Phytopathology Volume 15
    • Halos, P.M., (1978) Chemical control of the abaca dry sheath rot induced by Marasmius semi-ustus Berk & Curt
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    • Halos, P.M., (1981) Screening different varieties and hybrids of abaca for resistance against dry sheath caused by Marasmiellus inoderma
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    • Halos, P.M. , (1981) Screening abaca seedlings for Pythium blight, and root rot resistance
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    • Halos, P.M. , (1978) Movement, degradation, persistence and environmental impact of some soil treatment fungicides
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    • Halos, P.M., (1976) Development of control strategies against major fungal diseases of abaca
    • -
    • Halos, P.M., Vega, R., Calora, F.G. , (1979) The PCCP Story
    • PCCP Souvenir Program
    • Halos, P.M., (1981) Forecasting the prevalence and integrated control of potato late blight
    • -
    • Halos, P.M., San Juan, M.O., (1968) Dextran yields of four Leuconostoc mesenteroides isolates in coconut water and pineapple juice
    • Philippine Phytopathology Volume 4
    • Halos, P,M., Divinagracia, G.G. , (1970) Histopathology of mango fruits infected by Diplodia natalensis
    • Philippine Phytopathology Volume 6
    • Halos, P.M., (1970) Fruit trapping of blastocladiaceous fungi
    • Philippine Phytopathology Volume 7
    • Halos, P.M., Huisman, O.C., (1976) Mechanism of tolerance of Pythium species to ethanol
    • Phytopathology Volume 66
    • Halos, P.M., Divinagracia, G.G., (1971) Pycnidial and pycnidiospore production by Diplodia natalensis
    • Philippine Phytopathology Volume 7
    • Begonia, D., Catedrul, I.C., Torres,C., Halos, P.M., (1973) Uptake of hlelminthosporium sorghicola toxin and penneability changes induced in sorg-fiunr aid nungtiean
    • Philippine Journal of Biology Volume 7
    • Pordesimo, A.N., Imperio, E.N., Halos, P.M., (1972) Preharvest harvest spray and post harvest dip of mango fruits against anthracnose and fruit rots
    • Philippine Phytopathology Volume 8
    • Halos, P.M., Huisman, O.C., (1976) Mechanism of tolerance of Pythium species to ethazal
    • Phytopathology Volume 66
    • Halos, P.M., Huisman, O.C., (1974) Reversal of ethazol inhibition by mycelial extracts front Pythium species
    • American Phytopathology Volume 1
    • Begonia, D., Torres, C., Halos, P.M., (1978) Uptake of Helminthosporium sorghicola toxin and permeability changes induced in sorghum and mungbean
    • Philippine Journal of Biology Volume 7
    • Halos, P.M., Huisman, O.C., (1976) Inhibition of respiration in Pythium species by ethazol
    • Phytopathology Volume 66

Trainings

    • Roundup Hebicides Usage on Rubber and Oil Palm, 1982, Peninsular, Malaysia
    • Storyboard Method of Effective Presentation, 1982, Golden Sands Hotel, Penang ,Malaysia
    • Dimensional Sales Management II Training, 1982 D 11-17, Singapore Hilton, Singapore
    • 5th Annual Meeting of the Philippine Phytopathological Society, 1968 My 10-12, Davao, City
    • 3rd Annual Meeting of the Philippine Phytopathological Society, 1966 Jl 23-24, NSDB Pavillion, Manila
    • 6th Annual meeting of the Philippine Phytopathological Society, 1969 My 16-18, Bacolod City
    • 7th National Pest Control Council of the Philippines Conference, 1976 My 5-7, Cagayan de Oro City
    • 25th Anniversary Seminar Workshop on Science and Environment, 1976 O 27-29, Philippine International Convetion Center
    • 6th Annual Meeting of the Philippine Society for Microbiology, 1977 Ap 21-22, United Laboratories Inc. Manadaluyong, City
    • 8th Annual Scientific Meeting of the Crop Science Society of the Philippines, 1977 My 05 - 1977 My 07, MSAC La Trinidad, Beguet
    • Conference of the Federation of Professional Association in Food, Agriculture and Forestry, 1977 D, Philippine International Convention Center
    • The 1978 PAFAF Conference, 1978 D 07, El Grande Hotel, Paranaque, City
    • The Philippine Center for Advanced Studies Pre-Departure Orientation Seminar, 1978 Jl 29, U.P. Diliman, Quezon City
    • The Conference on Survival of Humankind, 1976 S 06 - 1976 S 10, Philippine International Convention Center,Metro Manila
    • The Symposium on cropping Systems Research and Development for the Asian Rice Farmer, 1976 S 21 - 1976 S 24, International Rice Research Institute, Los Banos, Laguna
    • The International Mungbean Conference, 1977, UPLB College, Laguna
    • 9th International Plant Protection Congress, 1979 Ag 05 - 1979 Ag 11, Washington, D.C.
    • The Monsanto SEA Regional Product Development Conference, 1982 O, Penang, Malaysia