Search Results - "Philippines"

Varietal improvement options for higher rice productivity in salt affected areas using crop modelling by Radanielson, Ando M., Gaydon, Donald S., Rahman Khan, Md. Mahbubur, Chaki, Apurbo K., Rahman, Md. Atikur, Angeles, Olivyn, Li, Tao, Ismail, A.

“…The ORYZA v3 model was calibrated and validated with field experimental data collected between 2012 and 2014 in Satkhira, Bangladesh and Infanta, Quezon, Philippines, then used for simulations scenario considering virtual varieties possessing different combinations of crop model parameter values related to crop salinity response and the soil salinity dynamic observed at Satkhira site. …”
Get full text

Improved early season management of sub1 rice varieties enhances post-submergence recovery and yield by Banayo, Niño P. M., Mabesa-Telosa, Ranee C., Singh, Sudhanshu, Kato, Yoichiro

“…Field experiments were conducted at the International Rice Research Institute, Philippines in the dry and wet seasons of 2013. Complete submergence was imposed for 14 days starting at 37 days after transplanting. …”
Get full text

The stadium effect: rodent damage patterns in rice fields explored using giving‐up densities by Jones, Clare R., Lorica, Renee P., Villegas, James M., Ramal, Angelee F., Horgan, Finbarr G., Singleton, Grant R., Stuart, Alexander M.

“…To further understand this behavior of rodent pests and to develop recommendations for future research and management, we examined the relation between giving‐up densities (GUDs) and damage patterns. In Tanay, Luzon, Philippines, GUD trays containing pieces of coconut in a matrix of sand were placed at 4 different distances from the field edge to quantify the perceived risk of predation in a rice field pest, Rattus tanezumi. …”
Get full text

Geographic and research center origins of rice resistance to Asian planthoppers and leafhoppers: implications for rice breeding and gene deployment by Horgan, Finbarr G., Srinivasan, Thanga, Bentur, Jagadish, Kumar, Ram, Bhanu, K., Sarao, Preetinder, Chien, Ho, Almazan, Maria, Bernal, Carmencita, Ramal, Angelee, Ferrater, Jedeliza, Huang, Shou-Horng

“…Virulence of the whitebacked planthopper, Sogatella furcifera, in Taiwan and the Philippines was also assessed. Phylogenetic analysis of the varieties using single-nucleotide polymorphisms (SNPs) indicated a clade of highly resistant varieties from South Asia with two further South Asian clades of moderate resistance. …”
Get full text

Effects of bund crops and insecticide treatments on arthropod diversity and herbivore regulation in tropical rice fields by Horgan, F.G., Ramal, A.F., Villegas, J.M., Jamoralin, A., Bernal, C.C., Perez, M.O., Pasang, J.M., Naredo, A.I., Almazan, M. L. P.

“…Ecological engineering using vegetable or flower strips is promoted as a potential pest management strategy in irrigated rice. Farmers in the Philippines often plant rice levees (bunds) with vegetables, particularly string beans (Vigna unguiculata [L.] …”
Get full text

Cropping system diversification for food production in Mindanao rubber plantations: A rice cultivar mixture and rice intercropped with mungbean by Hondrade, Rosa Fe, Hondrade, Edwin, Zheng, Lianqing, Elazegui, Francisco, Duque, Jo-Anne Lynne Joy E., Mundt, Christopher C., Vera Cruz, Casiana M., Garrett, Karen A.

“…We evaluated the potential for planting rice, mungbean, rice cultivar mixtures, and rice intercropped with mungbean in young rubber plantations in experiments in the Arakan Valley of Mindanao in the Philippines. Rice mixtures consisted of two- or three-row strips of cultivar Dinorado, a cultivar with higher value but lower yield, and high-yielding cultivar UPL Ri-5. …”
Get full text

Seed germination ecology of itchgrass (Rottboellia cochinchinensis) by Bolfrey-Arku, Grace E-K., Chauhan, Bhagirath S., Johnson, David E.

“…Experiments were conducted in the laboratory and screenhouse to determine the effects of light, alternating day/night temperatures, high temperature pretreatment, water stress, seed burial depth, and rice residue on seed germination and seedling emergence of itchgrass in the Philippines. Two populations were evaluated and the results were consistent for both populations. …”
Get full text

Influence of environmental factors on the germination of Urena lobata L. and its response to herbicides by Awan, Tahir Hussain, Chauhan, Bhagirath Singh, Sta. Cruz, Pompe C.

“…Urena lobata is becoming a noxious and invasive weed in rangelands, pastures, and undisturbed areas in the Philippines. This study determined the effects of seed scarification, light, salt and water stress, amount of rice residue, and seed burial depth on seed germination and emergence of U. lobata; and evaluated the weed's response to post-emergence herbicides. …”
Get full text

Competitive interactions between weedy rice and cultivated rice as a function of added nitrogen and the level of competition by Chauhan, Bhagirath S., Johnson, David E.

“…The competitive outcomes between weedy rice from Malaysia (MWR), the Philippines (PWR), and Vietnam (VWR) and cultivated rice (IR64) grown in pots were evaluated in a replacement series experiment with added N (0, 50, 100, and 150 kg N ha−1) and competition with IR64 plants (no competition, eight weedy rice plants : 0 IR64 plants; low competition, six weedy rice plants : two IR64 plants; and high competition, two weedy rice plants : six IR64 plants). …”
Get full text

Evaluation of African cultivated rice Oryza glaberrima for resistance to bacterial blight by Djedatin, Gustave, Ndjiondjop, Marie-Noëlle, Mathieu, Thierry, Vera Cruz, Casiana M., Sanni, Ambaliou, Ghesquière, Alain, Verdier, Valérie

“…Six-week-old seedlings were inoculated with five different African X. oryzae pv. oryzae strains originating from the West African nations of Burkina and Mali and representing different races (A1, A2, and A3). Philippine X. oryzae pv. oryzae strain PXO86 (race 2) was also used. …”
Get full text

Ants in tropical irrigated rice: distribution and abundance, especially of Solenopsis geminata (Hymenoptera: Formicidae) by Way, M.J., Islam, Z., Heong, K.L., Joshi, R.C.

“…At least 62 species of ants were caught at baits in Philippine rice fields, notably in the bunds (levées) of irrigated rice. …”
Get full text

Grain yield and yield attributes of new plant type and hybrid rice by Yang, Woonho, Peng, Shaobing, Laza, Rebecca C., Visperas, Romeo M., Dionisio-Sese, Maribel L.

“…Fifteen genotypes, five from each of the three groups, were grown in the dry (DS) and wet seasons (WS) of 2003 and 2004 at the International Rice Research Institute, Philippines. On average, hybrids produced 11 to 14% greater grain yield than indica inbreds and NPTs in the DS. …”
Get full text

Influence of different Oryza cultivars on expression of nifH gene pools in roots of rice by Knauth, Stefan, Hurek, Thomas, Brar, Darshan, Reinhold-Hurek, Barbara

“…IR56, grown under identical conditions in rice field soil in the Philippines without N‐fertilizer application. Remarkable varietal differences in root associated nifH‐gene expressing communities were detected. …”
Get full text

Durability of brown planthopper, Nilaparvata lugens, resistance in rice variety IR64 in greenhouse selection studies by Alam, Syed N., Cohen, Michael B.

“…Colonies of brown planthopper, Nilaparvata lugens (Stål), established from three locations on Luzon Island, Philippines, were selected for adaptation to four rice varieties: IR22 (no major resistance genes), IR26 (Bph1 gene), IR64 (Bph1 and additional moderate resistance from minor genes), and IR72 (Bph3). …”
Get full text

A process-based model for methane emission predictions from flooded rice paddies by van Bodegom, P.M., Wassmann, R., Metra-Corton, T.M.

“…The model was validated with independent field measurements of methane emissions at sites in the Philippines, China, and Indonesia with only few generally available site‐specific input parameters. …”
Get full text

Reversal of rice yield decline in a long-term continuous cropping experiment by Dobermann, Achim, Dawe, David, Roetter, Reimund P., Cassman, Kenneth G.

“…In a long‐term continuous cropping experiment at Los Baños, Philippines, three rice (Oryza sativa L.) crops were grown each year with the goals of maximum annual grain production and high N use efficiency. …”
Get full text

Yield potential trends of tropical rice since the release of IR8 and the challenge of increasing rice yield potential by Peng, S., Cassman, K.G., Virmani, S.S., Sheehy, J.E., Khush, G.S.

“…Since the release of IR8 in 1966, 42 additional indica rice (Oryza sativa L.) cultivars developed by the International Rice Research Institute (IRRI) for the irrigated and favorable rainfed lowlands have been released in the Philippines. The maximum yield of IR8 has been reduced by about 2 Mg ha−1 during the past 30 yr. …”
Get full text

Resource Use And Plant Interactions In A Rice-Mungbean Intercrop by Aggarwal, P.K., Garrity, D.P., Liboon, S.P., Morris, R.A.

“…Treatments were evaluated during two rainy seasons on an unfertilized Typic Tropudalf at Los Baños, Philippines. Nitrogen uptake by intercropped rice (33.4 and 41.1 kg N ha−1) approximated that of sole rice (35.4 and 38.1 kg N ha−1). …”
Get full text

Net Photosynthesis, Water Use Efficiency, Leaf Water Potential and Leaf Rolling As Affected By Water Deficit in Tropical Upland Rice by Dingkuhn, M., Cruz, R.T., O'Toole, J.C., D÷rffling, K.

“…A drought-susceptible semidwarf (IR20) and a drought-resistant traditional (Azucena) rice were grown in a dryland field experiment with sprinkler irrigation during the dry season in the Philippines. Differential irrigation was imposed for 11 days during vegetative growth using a line source sprinkler. …”
Get full text

Potential of Inhibitors for Increasing Response of Lowland Rice to Urea Fertilization by Buresh, R.J., De Datta, S.K., Padilla, J.L., Chua, T.T.

“…Two field 15N balance studies at multiple rates of urea with and without a urease inhibitor, phenyl phosphorodiamidate, were conducted in the Philippines. The urea was split broadcast into floodwater at 16 or 18 d after transplanting and at 5 to 10 d after panicle initiation. …”
Get full text