It is with great regret that we must inform you that Romeo Visperas
has passed away. He volunteered many
hours of his time to help The Shouichi Yoshida Memorial Fund scholars, and at
this time, we would like to extend our heartfelt condolences to his
family.
Romeo Visperas was born in Mangaldan, Pangasinan on October 7, 1946.
He graduated from UPLB (University of the Philippines Los Baños) in 1970
with a BSA and received his MS in agricultural botany from the same university
in 1975.
Romeo started working with
IRRI (International Rice Research Institute) in 1969 as a Research Aid in the
Department of Plant Physiology. He was
promoted to Research Assistant in 1972 and Senior Research Assistant in
1976. In 1984, he became Assistant
Scientist and was further promoted to Senior Assistant Scientist in 1995.
Romeo has an excellent
academic record and has a long list of awards since his school days. He was Salutatorian in Grade I, Valedictorian
from Grades II – VI, and Valedictorian throughout his 4 years at Mangaldan High School. In 1980, IRRI awarded him with the
Outstanding Performance Award. In 1994,
IRRI awarded him with the Excellence Award.
Romeo Visperas was not only a good scientist, but a good man. He is survived by his loving wife Rosenda V.
Visperas and his children Rommel, Delfin, Roselle,
and Romeo Visperas, Jr.
May he always be remembered and honored in all our hearts.
Other Awards:
Certificate of Recognition for his distinguished career as an agricultural
researcher at the International Rice Research Institute, College, Laguna. Given in Mangaldan, Pangasinan on the 7th
day of March 1979 in connection with the Town Fiesta Celebration. Given by Macario G. Ydia, Municipal Mayor,
Sofronio G. Padre, Chairman, Committee on Awards, and Roger A. Domagas
Chairman, Executive Committee.
CSSP Best Paper Award for the paper “Enhanced grain yield potential in
rice by increasing the number of high density grains” by B. Venkateswarlu, B.S.
Vergara, F.T. Parao, and R.M. Visperas
presented at the Second Annual Scientific Conference of the Federation of Crop
Science Societies of the Philippines, 30 April-2 May 1986, La Trinidad,
Benguet.
Mangaldan National High School
Alumni Association, Mangaldan, Pangasinan hereby bestows this Award of
Recognition upon Romeo Mercado
Visperas, Assistant Scientist, IRRI, Los Baños, Laguna, Class 63 whose
exemplary and meritorious achievements in Agriculture
manifested through his intellectual pursuits, genuine feat and moral
examples will serve as living landmarks for all alumni, thus setting a standard
of performance and excellence worthy of commendation and emulation. Given this 3rd day of March 1995
in the celebration of the MNHS Golden Jubilee.
Given by Dr. Gregorio T. de Guzman, Chairman, Committee on Awards and
Mayor Benigno M. Gubatan, President and Chairman, Executive Committee on
General Alumni Homecoming.
DA Secretary’s Award (R&D Paper Published in an Institute for
Scientific Information – Current Content Journal) for the paper “Residual
effects of nitrogen fertilization on foliar chlorophyll and yield of the
succeeding rice crop” published in Philippine Agricultural Scientist, vol. 85,
Year 2002 by Foad Moradi, Arcelia A. Alejar, Shaobing Peng and Romeo M. Visperas. Presented by Luis P. Lorenzo, Jr., Secretary,
DA and William C. Medrano, Director, DA-BAR during the 16th BAR
Anniversary Celebration, Diliman, Quezon
City, 9 October 2003.
Best Paper Award
for the paper “Testing of aerobic rice in the Philippines; results of field
experiments at IRRI” by Castañeda, A.R., B.A.M. Bouman, S. Peng, and R.M. Visperas presented at the 54th
Philippine Agricultural Engineering Annual National Convention, April 19-22,
2004, Central Luzon State University, Muñoz, Philippines.
The CGIAR Science Award for
Outstanding Scientific Article
for “Rice yields decline with higher night temperature from global warming”
published in Proceedings of the National Academy of Sciences (PNAS) vol. 101,
Year 2004, by Shaobing Peng, Jianliang Huang, John C. Sheehy, Rebecca C. Laza, Romeo M. Visperas, Xuhua Zhong, Grace
C. Centeno, Gurdev S. Khush, and Kenneth G. Cassman. Presented by Ian Johnson, Chairman, CGIAR,
December 7, 2005, Marrakech,
Morocco.
Co-author of “Rice yields decline with higher night temperature from
global warming” published in Proceedings of the National Academy of Sciences
(PNAS) vol. 101, Year 2004, by Shaobing Peng, Jianliang Huang, John C. Sheehy,
Rebecca C. Laza, Romeo M. Visperas,
Xuhua Zhong, Grace C. Centeno, Gurdev S. Khush, and Kenneth G. Cassman and
ranked 68th in “Discover” magazine’s top 100 science stories for 2004, January 2005.
Republic of the Philippines.
Department of Education Region I, Division of Pangasinan II, Mangaldan National
High School presents
this Plaque of Appreciation to Romeo M. Visperas, Valedictorian, Class
’63, Senior Associate Scientist, CESD Division, International Rice Research
Institute, in grateful recognition for his valuable time and efforts he shared
to us as Guest of Honor and Speaker on its 65th Commencement
Exercises with the theme “Changing Lives, Edukasyon ang Solusyon”, and for
sharing with the 2010 graduates, his brilliant, distinct and objective views
and ideas which have enlightened, inspired and encouraged them to become
successful and productive citizens of the land.
Given this 31st day of march in the year of our lord two
thousand and ten at Mangaldan National
High School,
Mangaldan, Pangasinan by Rosalino T. Agpalo, Ed. D., Principal IV and Viraluz
S. Raguindin, CESO VI, CEO VI, Schools Division Superintendent.
Publications:
1.
Vergara, B.S. and R.M.
Visperas. 1969.
Studies on the responses of the rice plant to photoperiod. V. Number of photoinductive cycles needed for
panicle initiation and panicle emergence.
Philipp. Agric. 53:308-312.
2.
Vergara, B.S., T.M. Chu, and R.M. Visperas. 1970.
Effect of temperature on the anthesis of IR8. Intl. Rice Comm. Newsl. 19:11-17.
3.
Vergara, B.S., R.M.
Visperas, F. Canuto, A. Mazaredo, and T.M. Chu. 1971. Physiological and morphological effects of
temperature on IR8. Pages 417-424 in Proc. Second Annual Scientific
Meeting, Crop Sci. Soc. Philippines, Los Baños, Laguna.
4.
Visperas, R.M., B.S.
Vergara, and M.C. Palada. 1971.
Effect of the number of seedlings per hill, spacing and nitrogen level
on seedling establishment and subsequent grain yield. Pages 458-464 in Proc. Second Annual Scientific Meeting, Crop Sci. Soc.
Philippines, Los Baños, Laguna.
5.
Vergara, B.S., A.M. Mazaredo and R.M. Visperas. 1972.
Survival of rice seeds buried in flooded soils. Pages 37-41 in Proc. Third Annual Scientific Meeting, Crop Sci. Soc.
Philippines, Cagayan de Oro City.
6.
Vergara, B.S., R.M.
Visperas, and A.M. Mazaredo. 1972.
Establishment of dapog rice seedlings and grain yield. Intl. Rice Comm. Newsl. 21(2):1-9.
7.
Alluri, K., B.S. Vergara, and R.M. Visperas. 1973.
Observations on damage to rice leaves by strong winds. SABRAO (Soc. Adv. Breed. Res. Asia Oceania) J. 5:129-132.
8.
Visperas, R.M. and B.S.
Vergara. 1973. Scirpus maritimus L.: Growth characteristics and response to light
duration and intensity. Pages 229-245 in Proc. Fourth Annual Scientific
Meeting, Crop Sci. Soc. Philippines, Cebu
City.
9.
Vergara, B.S., R.M.
Visperas, K.A. Gomez, and K. Alluri.
1974. Relation between leaf area and drought
resistance in rice. Pages 195-198 in Proc. Fifth Annual Scientific
Meeting, Crop Sci. Soc. Philippines, Naga
City.
10.
Vergara, B.S. and R.M.
Visperas. 1975.
Effect of temperature on the growth duration of rice. Pages 5/25-30 in Proc. Sixth Annual Scientific Meeting, Crop Sci. Soc.
Philippines, Bacolod
City.
11.
Vergara, B.S. and R.M.
Visperas. 1975.
Science Principles in Rice Farming.
Science Education
Center, University of the Philippines, Diliman, Quezon City.
44 p.
12.
Visperas, R.M. 1975. Autecology of Scirpus maritimus L. MS thesis, University of the Philippines at
Los Banos. College, Laguna. 67 p.
13.
Vergara, B.S., A.M. Mazaredo, and R.M. Visperas. 1976.
Studies on volunteer rice plants in paddy field. Grains J. 1(2):46-50.
14.
Vergara, B.S., J. Peralta, and R.M. Visperas. 1976.
"Salt solution" for selecting rice seeds - not worth it. Crops & Soils 2(5):4, 15.
15.
Vergara,
B.S., R. Visperas, J. Peralta, E.
Shuwisitkul, S. Karin and S. Sophonsakulkaew.
1976. Screening for kneeing
ability. Intl. Rice Res. Newsl. 2(1):3.
16.
Vergara,
B.S., R. Visperas, J. Peralta, E.
Shuwisitkul, S. Karin and S. Sophonsakulkaew.
1976. Screening for kneeing
ability. Pages 123-124 in Proc. 1976 Deep-water Rice Workshop,
November 1976, Thailand. Int. Rice Res. Inst., Los Banos, Philippines.
17.
Vergara, B.S. and R.M.
Visperas. 1976.
Increasing the efficiency of nitrogen fertilizer in rice. Philipp. Biota 10(14):117-126.
18.
Vergara,
B.S., R.M. Visperas, W.R. Coffman,
R.L. Villareal, and E. Bacalangco.
1976. Screening of the rice germ
plasm for low temperature tolerance at different stages of growth. SABRAO (Soc. Adv. Breed. Res. Asia Oceania) J. 8:97-104.
19.
Visperas, R.M. and B.S.
Vergara. 1976. Autecology of Scirpus maritimus L. I. Growth
characteristics and competition with rice.
Philipp. Weed Sci. Bull. 3:1-4.
20.
Visperas, R.M. and B.S.
Vergara. 1976. Autecology of Scirpus maritimus L. II. Effect of light, temperature, and
moisture. Philipp. Weed Sci. Bull.
3:15-29.
21.
Visperas, R.M. and B.S.
Vergara. 1976. Autecology of Scirpus maritimus L. III. Effect of shoot cutting on flowering. Philipp. Weed Sci. Bull. 3:30-32.
22.
Vergara,
B.S., K. Moody, and R.M. Visperas. 1977.
Autecology of Scirpus maritimus L. IV.
Suggested control under field conditions. Philipp. Weed Sci. Bull. 4:7-12.
23.
Vergara, B.S. and R.M.
Visperas. n.d.
President Marcos' Handbook for Farmers: Primer on Rice. National
Media Production
Center. 71 p.
24.
Setabutara, C., B.S. Vergara, and R.M. Visperas. 1979.
Flowering response of deepwater rice varieties to photoperiod. Pages 55-61 in Proc. 1978 Intl. Deepwater Rice Workshop. Intl. Rice Res. Inst., Los Baños, Philippines.
25.
Vergara,
B.S., J.K. Ahn, R.M. Visperas, G.S.
Chung, and J.H. Lee. 1979. Highlights of the Korea-IRRI collaborative
program on rice cold tolerance. Intl.
Rice Res. Newsl. 4(3):12-13.
26.
Li, T.G., B.S. Vergara, and R.M. Visperas. 1980. A
method for testing cold tolerance of rice at early seedling stage. Intl. Rice Res. Newsl. 5(5):13-14.
27.
Chen, J.C., R.M.
Visperas, and B.S. Vergara. 1981.
Effect of ash on the cold tolerance of rice at seedling stage. Intl. Rice Res. Newsl. 6(5):10.
28.
Li, Tai-Gui, B.S. Vergara, and R.M. Visperas. 1981.
Adaptability of rice cultivars to different temperature patterns. Sci. Agric. Sin. 4:45-50. (In Chinese with English summary).
29.
Li, T.G., R.M.
Visperas, and B.S. Vergara. 1981.
Correlation of cold tolerance at different growth stages in rice. Acta Bot. Sin. 23(3):203-207. (Chinese summary).
30.
Chung, G.S., M.H. Heu, B.S. Vergara, J.D. Yea, G.
Patena, and R.M. Visperas. 1982. Selection for rice cold tolerance using grain
yields versus phenotypic acceptability.
Intl. Rice Res. Newsl. 7(5):13-14.
31.
Vergara, B.S., J.H. Lee, G. Patena, J.D. Yea, and R.M. Visperas. 1982. Rice panicle type for high grain yields in
low temperature areas. Intl. Rice Res.
Newsl. 7(5):6-7.
32.
Ham, Y.S.,
J.H. Lee, B.S. Vergara, R.M. Visperas,
and S.Y. Kim. 1983. Low water temperature and sterility in
rice. Intl. Rice Res. Newsl. 8(2):22-23.
33.
Evans, L.T., R.M.
Visperas, and B.S. Vergara. 1984.
Morphological and physiological changes among rice varieties used in the
Philippines
over the last seventy years. Field Crops
Res. 8:105-124.
34.
Sahu, G., R.M.
Visperas, and B.S. Vergara. 1984.
Screening for shade tolerance in rice seedlings. Intl. Rice Res. Newsl. 9(3):26-27.
35.
Vergara, B.S. and R.M.
Visperas. 1984.
Adaptability and use of indica varieties in high latitude areas. Pages 39-52 in Potential Productivity and Yield Constraints of Rice in East Asia, Proceedings of International Crop Science
Symposium, 17-20 October, 1984. Fukuoka, Japan.
36.
Kaw, R.N.
and R.M. Visperas. 1986.
Evaluation of rice genotypes for cold tolerance at vegetative
stage. Intl. Rice Res. Newsl.
11(3):9-10.
37.
Kaw, R.N., R.M. Visperas, H.P. Moon, and J.D.
Yae. 1986. Estimates of combining ability for vegetative
stage cold tolerance in rice. Korean J.
Breed. 18(1):48-52. (Korean summary).
38.
Rasolofo, P.R., B.S. Vergara, and R.M. Visperas. 1986.
Screening rice cultivars at seedling stage and anthesis for
low-temperature tolerance in Madagascar. Intl. Rice Res. Newsl. 11(6):12-13.
39.
Venkateswarlu, B., F.T. Parao, R.M. Visperas, and B.S. Vergara.
1986. Screening quality grains of rice with a seed
blower. SABRAO (Soc. Adv. Breed. Res.
Asia Oceania) J. 18:19-24.
40.
Venkateswarlu, B., B.S. Vergara, F.T. Parao, and R.M. Visperas. 1986. Enhancing grain yield potentials in rice by
increasing the number of high density grains.
Philipp. J. Crop Sci. 11:145-152.
41.
Zapata,
F.J., R.R. Aldemita, A.U. Novero, L.B. Torrizo, L.B. Magaling, A.M. Mazaredo, R.M. Visperas, M.S. Lim, H.P.
Moon. 1986. IRRI-Korea collaborative project for the
development of cold-tolerant lines through anther culture. IRRI Res. Pap. Ser. 118. 7 p.
42.
Zapata,
F.J., L.B. Torrizo, R.R. Aldemita, A.U. Novero, A.M. Mazaredo, R.M. Visperas, M.S. Lim, H.P. Moon, and
M.H. Heu. 1986. Rice anther culture: a tool for production of
cold tolerant lines. Pages 773-780 in Rice Genetics, Int. Rice Res. Inst.,
Los Baños, Laguna.
43.
Venkateswarlu,
B. and R.M. Visperas. 1987.
Source-sink relationships in crop plants. IRRI Res Pap. Ser. No. 125. 19p.
44.
Venkateswarlu,
B. and R.M. Visperas. 1987.
Solar radiation and rice productivity.
IRRI Res. Pap Ser. No. 129. 22p.
45.
Venkateswarlu, B., B.S. Vergara, and R.M. Visperas. 1987. Influence of vegetative growth duration on
grain grade. Intl. Rice Res. Newsl.
12(1):4-5.
46.
Venkateswarlu, B., B.S. Vergara, and R.M. Visperas. 1987. Influence of photosynthetically active
radiation on grain density of rice. Crop
Sci. 27:1210-1214.
47.
Duc, D., R.M.
Visperas, and B.S. Vergara. 1987. Low
temperature tolerance of traditional Vietnamese varieties. Intl. Rice Res. Newsl. 12(4):21.
48.
Visperas, R.M., R. Furoc,
R.A. Morris, B.S. Vergara, and G. Pateña.
1987. Flowering response of Sesbania rostrata to
photoperiod. Philipp. J. Crop Sci.
12(3):147-149.
49.
Xu, X.B., B.S. Vergara, R.M. Visperas and H.Z. Han. 1987.
Further observations on the "contraction stage of microspore"
in the rice (Oryza sativa L.). J. South China Agric. Univ. 8(1):19-24. (In Chinese with English summary).
50.
Mnzava, M.N.W., B.S. Vergara, and R.M. Visperas. 1988.
Effect of low temperature on selected rice varieties in Tanzania. Intl. Rice Res. Newsl. 13(4):14-15.
51.
Kaw, R.N.,
H.P. Moon, J.D. Yae, and R.M. Visperas. 1989.
Estimates of combining ability for cold tolerance at reproductive stage
in rice. Korean J. Breed. 21(3):188-195.
52.
Vergara,
B.S., B. Venkateswarlu, M. Janoria, J.K. Ahn, J.K. Kim, and R.M. Visperas. 1990.
Rationale for a low-tillering rice plant type with high density
grains. Philipp. J. Crop Sci. 15:33-40.
53.
Dai, Q., B.S. Vergara and R.M. Visperas. 1990.
Amelioration of cold injury in rice (Oryza
sativa L.): Improving root oxidizing
activity by plant growth regulators.
Philipp. J. Crop Sci. 15:49-54.
54.
Arain, A., B.S. Vergara, and R.M. Visperas. 1990. Seed
density in relation to seedling quality and crop establishment in Oryza sativa L. Philipp. J. Crop
Sci. 15(3):137-145.
55.
Vergara,
B.S., B. Venkateswarlu, M. Janoria, J.K. Ahn, J.K. Kim, and R.M. Visperas. 1991.
Rationale for a low-tillering rice plant type with high-density
grains. Pages 39-53 in Direct Seeded Flooded Rice in the Tropics, Intl. Rice Res.
Inst., Los Baños, Laguna.
56.
Dai, Q.J., J.H. Xiong, R.M. Visperas, and B.S. Vergara.
1993. Response of rice (Oryza sativa L.)
cultivars from China
to low temperature stress. Philipp. J.
Crop Sci. 18(2):99-106.
57.
Xiong, J.H. Q.J. Dai, R.M. Visperas, and B.S. Vergara.
1993. Physiological screening of rice for low
temperature tolerance. Intl. Rice Res. Notes
18(2):20-21.
58.
Alejar, A.A., T.S. Park, B.S. Vergara, and R.M. Visperas. 1995. The effect of source-sink imbalance on rice
leaf senescence and yield. Pages 723-726
in P. Mathis (ed.), Photosynthesis:
from light to biosphere. Proceedings of
the Xth International Photosynthesis Congress, Montpellier, France,
20-25 August 1995.
59.
Mallik, S., A.K. Aguilar, B. Venkateswarlu, R.M. Visperas, and B.S. Vergara. 1995. Influence of temperature on grain density of
rice. Oryza 32:250-253.
60.
Yin, X.,
M.J. Kropff, G. Mclaren, and R.M.
Visperas. 1995. A nonlinear model for crop development as a
function of temperature. Agric. For.
Meteorol. 77:1-16.
61.
Garcia,
F.V., S. Peng, H.C. Gines, R.C. Laza, A.L. Sanico, R.M. Visperas, and K.G. Cassman.
1996. Chlorophyll-meter based
nitrogen management improves nitrogen use efficiency of irrigated rice in
farmer’ fields. Pages 187-190 in R. Ishii and T. Horie (eds.), Crop
Research in Asia: Achievements and
Perspective. Proc. Second Asian Crop
Science Conference, 21-23 August 1995, Fukui,
Japan.
62.
Huang, S., Q. Dai, S. Peng, A.Q. Chavez, M.L.L. Miranda,
R.M. Visperas and B. S.
Vergara. 1996. Influence of supplemental
ultraviolet-B on indoleacetic acid and calmodulin in the leaves of rice (Oryza sativa L.). Plant Growth Regulation
21:59-64.
63.
Peng, S.,
F.V. Garcia, H.C. Gines, R.C. Laza, M.I. Samson, A.L. Sanico, R.M. Visperas and K.G. Cassman. 1996.
Nitrogen use efficiency of irrigated tropical rice established by
broadcast wet-seeding and transplanting.
Fert. Res. 45(2):123-134.
64.
Peng, S., F.V. Garcia, R.C. Laza, A.L. Sanico, R.M. Visperas, and K.G. Cassman. 1996. Increased N-use efficiency using a
chlorophyll meter on high-yielding irrigated rice. Field Crops Res. 47:243-252.
65.
Peng, S., J.
Yang, F.V. Garcia, R.C. Laza, R.M.
Visperas, A.L. Sanico, A.Q. Chavez, and S.S. Virmani. 1998.
Physiology-based crop management for yield maximization of hybrid
rice. Pages 157-176 in S.S.Virmani, E.A. Siddiq, and K. Muralidharan (eds.) Advances in
Hybrid Rice Technology, Proc. Third International Symposium on Hybrid Rice,
Directorate of Rice Research, Hyderabad, 14-16 November 1996, Hyderabad,
India. International Rice Research
Institute, P.O. Box 933,
Manila, Philippines.
66.
Ying, J., S.
Peng, Q. He, H. Yang, C. Yang, R.M.
Visperas, and K.G. Cassman.
1998. Comparison of high-yield
rice in a tropical and subtropical environment.
I. Determinants of grain and dry matter yields. Field Crops Res.
57:71-84.
67.
Ying, J., S.
Peng, G. Yang, N. Zhou, R.M. Visperas,
and K.G. Cassman. 1998. Comparison of
high-yield rice in a tropical and subtropical environment. II. Nitrogen accumulation and utilization
efficiency. Field Crops Res. 57:85-93.
68.
Peng, S., R.C. Laza, G.S. Khush, A. L. Sanico, R.M. Visperas, and F.V. Garcia. 1998. Transpiration efficiencies of indica and
improved tropical japonica rice grown under irrigated conditions. Euphytica 103:103-108.
69.
Visperas, R.M., S. Peng, G.S. Khush, R. Ishii, and S. Akita. 1998.
Improving the grain-filling percentage of new plant type rice. Pages 471-477 in H.Y. Lu, J.M. Sung, and C.H. Kao, eds., Proceedings of the 3rd
Asian Crop Science Conference, Taichung,
Taiwan, April
27-May 2 1998.
70.
Zhong. X. S.
Peng, J.E. Sheehy, H. Liu, and R.M.
Visperas. 1999. Parameterization, validation and comparison
of three tillering models for irrigated rice in the tropics. Plant Prod. Sci. 2(4):258-266.
71.
Peng, S.,
A.L. Sanico, F.V. Garcia, R.C. Laza, R.M.
Visperas, J.P. Descalsota, and K.G. Cassman. 1999.
Effect of leaf phosphorus and potassium concentration on chlorophyll
meter reading in rice. Plant Prod. Sci.
2(4):227-231.
72.
Yang, J.C, S.B. Peng, R.M. Visperas, Q.S. Zhu, and S.L. Gu. 1999.
Relationship between zeatin and zeatin riboside contents and grain
filing of rice. Chinese Rice Res. Newsl.
7(3):11.
73.
Zhong, X.,
S. Peng, J.E. Sheehy, H. Liu and R.M.
Visperas. 1999. Effects of leaf N
concentration and leaf area index on determining rice tillering. Chinese Rice Res. Newsl. 7(4):8-9.
74.
Yang, J.C.,
S.B. Peng, R.M. Visperas, Q.S. Zhu,
and S.L. Gu. 1999. Grain filling patterns of new plant type of
rice. Chinese Rice Res. Newsl.
7(4):10-11.
75.
Peng, S.,
R.C. Laza, R.M. Visperas, A. L.
Sanico, K.G. Cassman, and G.S. Khush.
2000. Grain yield of rice
cultivars and lines developed in the Philippines since 1966. Crop Sci. 40:307-314.
76.
Yang, J.C.,
S.B. Peng, R.M. Visperas, A. L.
Sanico, Q.S. Zhu, and S.L. Gu.
2000. Grain filling pattern and
cytokinin content in the grains and roots of rice plants. Plant Growth Regulation 30(3):261-270.
77.
Sanico, A. L., S. Peng, R.C. Laza, and R.M. Visperas. 2002. Effect of seedling age and seedlings per hill
on snail damage in irrigated rice. Crop
Protection 21:137-143.
78.
Visperas, R.M. and S. Peng. 1999. The rice plant. In S. Leong and P.S. Teng (eds). A Colour Handbook of Pests, Diseases, and
Disorders of Rice. Manson Publishing, London (in press)
79.
Yang, J.C,
S.B. Peng, S.L. Gu, R.M. Visperas,
and Q.S. Zhu. 2001. Changes in zeatin and zeatin riboside content
in rice grains and roots during grain filling and the relationship to grain
plumpness. Acta Agron. Sin.
27(1):35-42. (In Chinese w/ English
summary)
80.
Yang, J.C.,
S.B. Peng, S.L. Gu, R.M. Visperas,
and Q.S. Zhu. 2001. Changes in activities of three enzymes
associated with starch synthesis in rice grains during grain filling. Acta
Agron. Sin. 27(2):157-164. (In Chinese
w/ English summary)
81.
Laza, Ma. R.C., S. Peng, A.L. Sanico, R.M. Visperas, and S. Akita. 2001. Higher leaf area growth rate contributes to
greater vegetative growth of F1 rice hybrids in the tropics. Plant Prod. Sci. 4(3):184-188.
82.
Moradi, F., A.A. Alejar, S. Peng, and R.M. Visperas. 2002. Residual effects of nitrogen fertilization on
foliar chlorophyll and yield of the succeeding rice crop. Philipp. Agric. Sci. 85(4):343-349.
83.
Castañeda, A.R., B.A.M. Bouman, S. Peng, and R.M. Visperas. 2002.
The potential of aerobic rice to reduce water use in water-scarce
irrigated lowlands in the tropics. Pages
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