Search

The bacterium Pseudomonas viridiflava (Burkholder, 1930) causes economic damage in beans (Phaseolus vulgaris L.); it has been shown that it can affect more than 50 hosts (Saygili et al., 2008), among which are alfalfa (Medicago sativa), apple tree [Malus pumila var. domestica (Borkh.) CK Schneid.] (Alimi et al., 2011), and broccoli (Brassica oleracea L.); however, in Origanum vulgare, there is no report of any damage on agave mezcalero (Agave inaequidens K.Koch), a species still little studied; this research was based on the evaluation of the effects of the bacterium Pseudomonas viridiflava in the process of imbibition in seeds of Agave inaequidens; on the other hand, the tolerance of the bacterium to the essential oils of cinnamon (Cinnamomum verum Blume), clove (Syzygium aromaticum L.), and oregano (Origanum heracleoticum Rchb.) was evaluated, as preliminary studies for the ecological, organic, agrochemical-free management strategy in crops affected by Pseudomonas viridiflava; it was found that the concentration of 25% of oregano and cloves oil was efficient in the development of the bacterium under in vitro conditions; in contrast, in the germination process based on the imbibition of the seed, there was no reduction in the percentage of germination or signs of damage due to the effect of the bacteria. [ABSTRACT FROM AUTHOR]

The variant called JICA-TH-19, located in the Experimental Orchard of the ‘Presidente Juárez’ Faculty of Agrobiology, was selected in 2021. Avocado trees descended from the original Hass variety from the state of California, USA, established during the 1970s in the INIFAP orchard in Uruapan, were used as reference material (control). Segregating materials were planted in 2016 and characterized between 2018-2022, in an experimental orchard located 4 km from Uruapan, Michoacán and its coordinates are: 19° 23’ 54.3” north latitude, 102° 03’ 12.9” west longitude, and an altitude of 1 636 m. The objective was to characterize morphologically variant genotypes of original ‘Hass’ avocado that have the potential to be exploited commercially in the avocado belt of Michoacán. The characterization of the trees and their vegetative and reproductive organs was carried out based on the Manual of descriptors for avocado (CICTAMEX, 1991), published by the Sánchez Colín Foundation with the support of the standard format followed by the International Board for Plant Genetic Resources (IBPGR). [ABSTRACT FROM AUTHOR]

Copyright of Revista Mexicana de Ciencias Agrícolas is the property of Instituto Nacional de Investigaciones Forestales, Agricolas y Pecuarias and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Mexicana de Ciencias Agrícolas is the property of Instituto Nacional de Investigaciones Forestales, Agricolas y Pecuarias and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Mexico is the leading producer, consumer and exporter of avocado in the world. The study of soil macrobiotics becomes more important in the avocado wilt complex because in these pathology biotic and abiotic causative agents can be implicated, being the Oomycete Phytophthora cinnamomi Rands the main radical disease of avocado cultivation. The objective of the present investigation was to evaluate the dynamics of the in vitro growth of Phytophthora cinnamomi in alternative culture media. In the months of October and November 2016, root samples were collected from avocado trees (Persea americana Mill. Var. Hass) in the INIFAP experimental orchard located in San Juan Nuevo Parangaricutiro, Michoacán. The isolates were identified morphologically and molecularly. The measurements of the growth diameters of each strain were recorded in vitro according to time. Linear regression was carried out using generalized linear models (GLM) to obtain the parameters of intercept and slope, significance of the regression and the R2 value adjusted. The analyzes were carried out using the statistical program R 3.4. According to the results obtained, the culture medium Rye-agar was the most efficient for the proliferation of P. cinnamomi. [ABSTRACT FROM AUTHOR]

In Mexico, long and thin rice is the most consumed, so its supply has depended mainly on imports. Consequently, the Mexican Rice Council handed INIFAP the elite lines that generated the Latin American Rice Irrigation Fund (FLAR) for the evaluation and selection of materials. In order to validate advanced lines of long and thin grain rice compared to conventional material under the conditions of the Michoacán production area, experimental works were developed in different cycles: autumn-winter 2014-2015 (trial 1), spring summer from years 2015 (trial 2), 2016 (trial 3) and 2017 (trial 4) and different genotypes: trial 1) INIFLAR RT, FL05601, “Milagro Filipino"; test 2) FL06747, FL08224, INIFLA R, INIFLAR RT, Ivory, Lombardy, “Milagro Filipino"; essay 3) Lombardy, FL08224, “Milagro Filipino"; and essay 4) Ivory, Lombardy “Milagro Filipino 2. The data recorded varied in each trial, but phenological and productive aspects were included, including yield. Analysis of variance and comparison of means were performed. In trial 1, treatments exceeded the regional average, between 8,000 and 8,500 kg ha-1. In trial 2, the treatments FL06747, INIFLAR R and Lombardy stood out significantly in performance. Also, the flowering and maturity of grain, appeared early compared to “Milagro Filipino". In trials 3 and 4, the Lombardy treatment showed higher yields. It is concluded that the advanced lines presented capacity to adapt to the production area of Michoacán. These materials were superior to the conventional material, since they showed consistency in each trial. [ABSTRACT FROM AUTHOR]