Identification of papaya sex can only be done four months after transplanting. The possibility of earlier sex identification either with isoenzymatic patterns or physical seed traits were evaluated in two commercial seeds: the hybrid Tainung 1 and Improved Sunrise Solo 72/12 four experiments were carried out in the Lavras municipality, Minas Gerais (Brazil). The first two experiments evaluated the relationship of seed ...

Tahiti lime, Citrus latifolia Tanaka (Rutaceae), is susceptible to Citrus Tristeza Virus (CTV), and if affected, decreases the profitability of the crop. In the well-drained high terrace of the Meta piedmont, the influence of the virus attack was evaluated on the performance of Tahiti lime grafted on six rootstocks(Carrizo; Sunki × English; Sunki × Jacobson; Pomeroy; Rubidoux, y Kryder 15-3) on a completely randomized ...

A list of organisms associated with yellow pitaya crop, Selenicereus megalanthus (K. Schum. ex Vaupel) Moran in Colombia is provided. The main pests of yellow pitaya in Colombia are the flower-bud fly Dasiops saltans Townsend (Diptera: Lonchaeidae) and Leptoglossus zonatus (Dallas) (Hemiptera: Coreidae). In this study we report 29 organisms affecting yellow pitaya: 4 Classes, i.e., Arachnida (1 sp.), Aves (1 sp.), ...

Thrips are the main pest of the yellow passion fruit, with a potential of up to 95% damage in vegetative terminals. conventional management for this pest is focused on the use of chemical insecticides, restricting export of the fruit. This research looked at a model of integrated pest management (IPM) for thrips in cultivated passion fruit on three farms in the municipality of La Plata (Huila). There were two plots; ...

Due to the absence of varietal information for the tangerine (Citrus reticulata L.) ‘Arrayana’ in the piedmont plains of Meta (Colombia), morpho-agronomic and molecular characterization of 10-year-old commercial tangerine trees was carried out at the Research Center La Libertad of Corpoica in Villavicencio (Meta). Descriptors suggested by the International Genetic Resources Institute (IPGRI) were used for the morphological ...

Advances in the research on avocado cultivation are generally associated with major global producers (Chile, Mexico, and the United States). The issues that have been the subject of research are focused on the study of productive performance of the species under subtropical conditions. Research topics include studies on hormonal and nutritional factors associated with the growth and development of the avocado crop in ...

One of the disadvantages in agricultural production is the adequate and timely supply of seeds. The absence of controlled storage methods of citrus seeds in nurseries is the main limiting factor for the production of planting material, because 40% of this material is lost through poor physiological quality of the seeds. The objective of this study was to determine the best conditions for storing seeds of CPB Citrumelo ...

Adequate plant nutrition is essential to get high crop yields and good export quality for the cape gooseberry. In order to characterize the chemical fertility of soils of cape gooseberry producing areas in Cundinamarca, samples were taken in two major producing municipalities, Granada and Sylvania. To this end, we selected 30 farms for soil sampling and subsequent chemical characterization and determination of the ...

Four parasitoids of the passion fruit flower bud fly, Dasiops inedulis Steyskal (Diptera: Lonchaeidae) were collected in the present study, i.e., a larva-pupa type parasitoid, Utetes anastrephae (Viereck) (Hymenoptera: Braconidae), and three pupal parasitoids, namely Pachycrepoideus vindemmiae Rondani, Spalangia sp. (Hymenoptera: Pteromalidae) and Aganaspis sp. (Hymenoptera: Figitidae). In the field we observed a species ...

In tropical conditions near the equatorial, precipitation is the main climatic factor that influences the growth and development of citrus plants. In a ‘Valencia’ orange orchard planted with 11-year-old trees located in the higher portion of the foothills of Corpoica, La Libertad Research Center in Villavicencio, Meta, Colombia, we recorded tree production data between the years 2008-2010. Information on the phenology ...