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One of the most important technological advances of potato in Latín America in the last decades has been the development of methods for multiplication of high quality potato seed. During the eighties the International Potato Center (CIP) generated and intensively diffused among the national agricultura! research systems (NARS) the techniques for rapid multiplication and pathogen testing of clo ...

SUBJECT: potatoes; semilla; production; seeds; multiplication des plantes

POSTED TO: Revista Latinoamericana de la Papa [1019-6609]

The use of augmented designs in phases of plant breeding programs is a valuable tool for the selection decisions, but as a rule very little of these methods are implemented in those programs. When they are used, it is common to select the genotypes that are evaluated, as equal or superior to the best, to the worst, or to the average of the controls utilized. In this study, an analysis using th ...

SUBJECT: potatoes; diseno experimental; methode statistique; solanum tuberosum; plant breeding

POSTED TO: Revista Latinoamericana de la Papa [1019-6609]

Research for determining the Most appropriate time to apply the Sencor (Metribuzin) herbicide' and to select ' new herbicide alternatives' was conducted in two consecutive growing seasons (1993-94 and 1994-95) at Toralapa Experimental Station to control Spergula arvensis in potato crops. To achieve the first objective, the following treatments were performed during the first season: pre-emerg ...

SUBJECT: diuron; potatoes; trifluraline; trifluralin; metribuzin

POSTED TO: Revista Latinoamericana de la Papa [1019-6609]

The present study was conducted with the objective to estímate the most effective intervals of applications of the fungicide Chlorothalonil 82.5 for the management of the fungus P. infestans, in the rainy season. This test was carried out in the farm of a producer in the locality of Cerro Punta in the period August to December 1998. The statistical design utilized was split plots with a random ...

SUBJECT: pesticide resistance; potatoes; fongicide; resistencia a los plaguicidas; solanum tuberosum

POSTED TO: Revista Latinoamericana de la Papa [1019-6609]

Winged aphid population fluctuation using water yellow traps was followed up for four years (1988-1991) in two potato growing sites of the State of Merida, Venezuela. A total of 20 species and 7,298 specimens were collected at Mucuchíes (3,100 m), mainly in the dry season. Species more commonly captured were Brevicoryne brassicae (77%), Macrosiphum euphorbiae (7.92%), Hyperomyzus lactucae (4.9 ...

SUBJECT: potatoes; insectos chupadores; sucking insects; solanum tuberosum; virus de las plantas

POSTED TO: Revista Latinoamericana de la Papa [1019-6609]

Eight collaborating institutions (AGRUCO, CENDA, CPA, ACRA, PIABS, CESA, UTO, COPLA) and the communities that these institutions support, selected potato native cultivars grown above 3,500 m. Twenty-four of them were prioritized with PROINPA for virus clean up. These cultivars have excellent characteristics like rusticity against abiotic factors, and social importance for factors such as the p ...

SUBJECT: potatoes; variedades indigenas; variete a haut rendement; high yielding varieties; solanum tuberosum

POSTED TO: Revista Latinoamericana de la Papa [1019-6609]

Two triais were established in the area of Chullchungani (Carrasco Province, Dept. of Cochabamba), under an experimental design of randomized complete blocks with three treatments and three replications. The cultivars Robusta and Wayna, resistant to late blight were used. The PROINPA strategy for the chemical control of late blight for resistant cultivars is based on the application of a syste ...

SUBJECT: potatoes; fongicide; integrated control; integrated pest management; resistance aux maladies

POSTED TO: Revista Latinoamericana de la Papa [1019-6609]

This study was carried out during 1995-96 season in the Experimental Station Toralapa in Solivia, located at an altitude of 3,430 m. Two triáis were established, one on tillage timing and number of passes using the traditional plough: ' Arado de palo' and a second trial comparing the traditional plough with reversible and chisel ploughs. The objectives of both triáis were to determine the effe ...

SUBJECT: sol agricole; charrue; animal power; arados; soil chemicophysical properties

POSTED TO: Revista Latinoamericana de la Papa [1019-6609]

The increase in demand for processed potatoes implies that contract farming is gaining importance. To overcome their restrictions ¡n commercialization, small potato farmers would considerably benefit from this working modality getting access to a secure market with profitable and stable prices. Indeed, literature revision and a specific case from the Peruvian Andes reveal that chip and French ...

SUBJECT: production vegetale; plant production; association professionnelle; solanum tuberosum; agroindustry

POSTED TO: Revista Latinoamericana de la Papa [1019-6609]

To determine the incidence, distribution leve,I and search for new alternatives to control potato black scurf (Rhizoctonia solani) in the State of Mérida, a survey was done in five potato growing municipalities and a study of informal storage of potato seed tuber in Pico El Águila coming from seven municipalities was also conducted. The evaluations were done under greenhouse and field conditio ...

SUBJECT: potatoes; seed; control de enfermedades; solanum tuberosum; venezuela (republique bolivarienne du)

POSTED TO: Revista Latinoamericana de la Papa [1019-6609]