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A new disease of rice, known as ‘entorchamiento’ (crinkling), was first noticed in the Department of Meta, Colombia, in 1991. Symptoms include seedling death, foliar striping and severe plant malformation. Tissue extracts and purified preparations from diseased rice plants, contained virus-like p...


Morales, Francisco JoséWard, ElaineCastaño, MauricioArroyave, José A.Lozano Potes, IvánAdams, Michael J.[Emergence and partial characterization of rice stripe necrosis virus and its fungus vector in South America]Emergence and partial characterization of rice stripe necrosis virus and its fungus vector in South America

Action thresholds for Tibraca limbativentris Stall (TL) on rice were calculated to be 8.8 and 25.8 TL per 10 sweep nets for 30- and 40-day old plants, respectively. Population dynamics of TL at two localities in Valle del Cauca, Colombia, indicated a density of 1.2 TL per sweep (12 TL per 10 swee...


Pantoja Lopez, ATriana Espinel, MónicaBastidas López, HaroldGarcía Ardila, C.Duque E., Myriam Cristina[Damage by Tibraca limbativentris (Hemiptera: Pentatomidae) to rice in Southwestern Colombia]Damage by Tibraca limbativentris (Hemiptera: Pentatomidae) to rice in Southwestern Colombia

The rice hoja blanca virus (RHBV), transmitted by the planthopper insect Tagosodes orizicolus, is a disease that attacks rice and generates significant production losses in Colombia. Fedearroz 2000 and Colombia I commercial rice varieties, which have different resistance levels to the disease, we...


Barrera, Nubia F.Melgarejo, Luz M.Cruz Gallego, MaribelCortés, Lina JimenaGuzmán, FannyCalvo, Julio C.[Conformationally Restricted Peptides from Rice Proteins Elicit Antibodies That Recognize the Corresponding Native Protein in ELISA Assays]Conformationally Restricted Peptides from Rice Proteins Elicit Antibodies That Recognize the Corresponding Native Protein in ELISA Assays

In the oldest sections of Burkina Faso's largest irrigation scheme in the Sourou Valley (13° 10′ N, 03° 30′W) rice (Oryza sativa L.) yields dropped from about 5 to 6 t ha−1 in the early 1990s, shortly after establishment of the scheme, to 2 to 4 t ha−1 from 1995 onwards. Farmers blamed this yield...


Asten, Piet J.A. vanBarro, S.Wopereis, M.Defoer, T.[Using farmer knowledge to combat low productive spots in an irrigated rice scheme in Burkina Faso]Using farmer knowledge to combat low productive spots in an irrigated rice scheme in Burkina Faso
Arbeláez Vélez, Juan D.Moreno, Laura T.Singh, NamrataTung, Chih-WeiMaron, Lyza G.Ospina, YolimaMartínez, César P.Grenier, CécileLorieux, MathiasMcCouch, Susan R.[Development and GBS-genotyping of introgression lines (ILs) using two wild species of rice, O. meridionalis and O. rufipogon, in a common recurrent parent, O. sativa cv. Curinga]Development and GBS-genotyping of introgression lines (ILs) using two wild species of rice, O. meridionalis and O. rufipogon, in a common recurrent parent, O. sativa cv. Curinga
Goto,ShingoSasakura-Shimoda, FuyukoSuetsugu, MaiGómez Selvaraj, MichaelHayashi, NagaoYamazaki, MuneoIshitani, ManabuShimono, MasakiSugano, ShojiMatsushita, AkaneTanabata, TakanariTakatsuji, Hiroshi[Development of disease-resistant rice by optimized expression of WRKY45]Development of disease-resistant rice by optimized expression of WRKY45

Introduction. The Colombian Altillanura is going through a process of transformation, marked by the expansion of its agricultural border. In the region, it is being implemented a research agenda that seeks to develop and validate promising technologies for the improvement of productivity and sust...


Marin Salazar, Diego ArmandoAndrade, RobertLabarta, RicardoVásquez Urriago, Ángela RocíoCaicedo Guerrero, Samuel[Evaluación ex-ante del impacto del genotipo de arroz L23 en la Altillanura plana colombiana = Ex-ante impact evaluation of the L23 rice genotype on the colombian Altillanura plains]Evaluación ex-ante del impacto del genotipo de arroz L23 en la Altillanura plana colombiana = Ex-ante impact evaluation of the L23 rice genotype on the colombian Altillanura plains

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