The critical period of rice-weed competition was studied for the rice varieties Oryzica 1 and CICA 8, in 1989 and 1990. Weed species were: Eleusine indica, Echinochloa crus-galli, Echinochloa colonum, Cyperus difformis, Cyperus esculentus, Cyperus iria, Leptochloa filiformis, and Eclipta alba. Co...
Fischer, Albert J.
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Lozano, J.C.
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Ramírez Suárez, A.
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Sanint, Luis Roberto
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[Yield loss prediction for integrated weed management in direct-seeded rice]
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Yield loss prediction for integrated weed management in direct-seeded rice
The reasons an integrated pest and disease control in cassava is justified are analyzed. Some cultural practices are listed that would lessen the problems caused by negative production factors within an ecosystem and would give high stable yields. Recommendations are given to maintain and enrich ...
Lozano, J.C.
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Bellotti, Anthony C.
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[Integrated control of diseases and pest of cassava (Manihot esculenta Crantz)]
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Integrated control of diseases and pest of cassava (Manihot esculenta Crantz)
Lozano, J.C.
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[Algunos sistemas para el posible control de enfermedades radicales de la yuca]
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Algunos sistemas para el posible control de enfermedades radicales de la yuca
Lozano, J.C.
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Zeigler, Robert S.
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[Methods to screen for resistance against foliar bacterial pathogens]
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Methods to screen for resistance against foliar bacterial pathogens
A new disease of cassava has been found inducing epidemics in several cassava-growing areas of Colombia during the rainy season. The disease can be recognized by a characteristic exaggerated elongation of the internodes of young stems of infected plants and by the distortion and deformation of th...
Lozano, J.C.
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Toro, Julio C.
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Castro Merino, A.
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Bellotti, Anthony C.
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[Producción de material de siembra de yuca]
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Producción de material de siembra de yuca
Research results obtained during 1975-87 on the biocontrol of cassava pathogens are summarized with emphasis on the use of fluorescent pseudomonads as biocontrol agents in different cassava production systems. Evidence of biocontrol of Uromyces spp. by the mycoparasite Darluca filum is reviewed. ...
CIAT`s contribution to this joint research program was (1) to develop a technique for the production of bacteria-free planting stocks of cassava and (2) to study the effect of physical therapeutic agents on vegetative material used for propagation. The propagation technique developed to produce C...
Lozano, J.C.
,
[Inactivation of pathogenic organisms of cassava (Manihot esculenta Crantz) by heat and other treatments]
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Inactivation of pathogenic organisms of cassava (Manihot esculenta Crantz) by heat and other treatments
The most important bacterial disease of cassava is cassava bacterial blight (CBB). This disease was first recorded in Brazil but was later reported in Colombia and observed in several other countries in South America and Africa. Symptoms of this disease are leaf spotting, wilting, dieback and gum...