Rodriguez-Trejo D.A.,National Autonomous University of Mexico |
Tchikoue H.,National Autonomous University of Mexico |
Cintora-Gonzalez C.,National Autonomous University of Mexico |
Contreras-Aguado R.,Consultora Forestal |
de la Rosa-Vazquez A.,Campo Experimental Edzna
Agrociencia | Year: 2011
Forests affected by hurricanes accumulate large forest fuel loads in a short time that along with the local fire misuse and the sensibility of the tropical forests, make them vulnerable to the occurrence of catastrophic wildfires. In 2007, Dean Hurricane affected Quintana Roo, Campeche and Yucatán forests. In order to generate useful information for developing fire management plans in the region by state and federal authorities, the aim of this study was to estimate forest fuel loads generated by the passage of the hurricane, to model the fire danger and identify priority areas for protection. Samples were collected in 165 conglomerates in Quintana Roo, Campeche and Yucatán in 2007. The fire danger combined risk (perimeter of agricultural areas) and forest fire hazard (fuel load). Spatial estimates were made from multivariate models (kriging), with which maps were drawn in a geographic information system (GIS). Mode for loads was 40-60 Mg ha -1, the average 40 Mg ha -1, and the maximum 137 Mg ha -11. A total of 992 000 ha had very high-extreme hazard. The biggest impacts were at the eastern part of Quintana Roo, and fell to the western part, as the hurricane lost strength by friction with the earth.
Frequency of Varroa destructor, Nosema apis and Acarapis woodi in managed colonies and wild swarms of honey bees (Apis mellifera) in Merida, Yucatan, Mexico [Frecuencia de Varroa destructor, Nosema apis y Acarapis woodi en colonias manejadas y enjambres silvestres de abejas (Apis mellifera) en Mérida, Yucatán, México]
Puca J.F.M.,Campo Experimental Edzna |
Medina L.A.M.,Autonomous University of Yucatan |
Ventura G.A.C.,Autonomous University of Yucatan
Revista Mexicana De Ciencias Pecuarias | Year: 2011
Diseases and parasitosis that affect honey bees produce heavy losses to the honey industry. However, damages do not affect managed colonies and wild swarms homogeneously. With the purpose of determining frequency and rate of infestation of V. destructor, N. apis and A. woodi in bees in Yucatan, 76 bee samples were collected between June and September 2006, 27 from managed colonies and 49 from wild swarms. V. destructor frequency in managed colonies was 62.9 %, showing a 1.70 ± 0.26 mites/ 100 bees infestation rate and of 55.1 % in wild swarms, with a 1.96 ± 0.44 mites/100 bees infestation rate. No differences were found either for frequency (× 2=0.44, d.f.=1, P=0.51) or infestation rate (t=0.14, P=0.89). N. apis frequency in managed colonies was 74.0 %, showing a 1,480*103 ± 232*103 spores/bee infestation rate and of 53.0 % in wild swarms, with a 1,416*103± 264*103 spores/bee infestation rate. No differences were found either for frequency (X 2=3.22, df=1, P=0.07) or infestation rate (t=0.18, P=0.86). No presence of A. woodi was detected. Results confirm an increase in N. apis presence in Yucatan.
Ecological indicators of the weed community in the cultivation of mango mangifera indica l. in campeche state, mexico [Indicadores ecológicos de la comunidad de malezas en el cultivo de mango mangifera indica l. en el estado campeche, méxico]
Tucuch-Cauich F.M.,Campo Experimental Edzna |
Orona-Castro F.,Campo Experimental Edzna |
Almeyda-Leon I.H.,Research Center Regional Noreste |
Aguirre-Uribe L.A.,Antonio Narro Agrarian Autonomous University
Phyton | Year: 2013
Ango is the main species of fruit in the state of Campeche, Mexico, due to the economic benefts generated because of its production and marketing. Among the biotic problems that afect this crop in the region are weeds, which involve a heavy economic investment for their management. Under this scenario, it is important the development of ecological weed studies to generate information that help us to design strategies for managing the problem. During January to June 2010 a foristic study was developed on the population of weeds that compete with mango in the locations of Cayal and Castamay, at the state of Campeche. We obtained information from 20 mango orchards using 0.50 × 0.50 m quadrats, with a total of 20 quadrants/ha. Within each quadrat, we counted the number of weed species and determined relative density, relative dominance, frequency and spatial distribution. Te results showed the presence of 28 weed species in both locations. Te most abundant and dominant species was Rottboellia cochinchinensis Lour., while the most common species was Desmodium canadense L. Te dominant spatial distribution was aggregate in most species in the two study locations.
Aguirre U. L.A.,Antonio Narro Agrarian Autonomous University |
Miranda S. M.A.,Campo Experimental Valle de Apatzingan |
Urias L. M.A.,Campo Experimental Santiago Ixcuintla |
Orona C. F.,Campo Experimental Edzna |
And 3 more authors.
Revista Colombiana de Entomologia | Year: 2013
In the Campeche state, México, thrips species in mango and their population fluctuations are unknown which difficult their control causing losses in production and fruit quality; thus, the objective of this study was to determine the thrips associated with the crop, their population fluctuation and the level of damage. Research was carried out during 2009 and 2010 in Castamay, Campeche, Mexico. Samples were taken of the adults and nymph's population every 15 days in foliage and inflorescences and the level of damage to the fruit was determined. Thrips population was correlated with precipitation and temperature variables using the Pearson coefficient and χ2 tests were performed between thrips population and sampling dates. In 2009, the lowest population was 0.00 and 0.13, the highest per leave in both nymphs and adults. In 2010, the lowest populations were 0.00 individuals per leaf for both nymphs and adults and the highest of 0.15 adults per leaf and 0.35 nymphs per leaf. The observed damage levels were low and showed no significant influence on fruit production. Four thrips species associated with mango, all phytophagous were found Heliothrips haemorrhoidalis, Frankliniella invasor, Scirtothrips perseae and S. hectorgonzalazi. The population fluctuation was not significantly correlated with climatic variables.
Tucuch-Cauich M.,Campo Experimental Edzna |
Miranda-Salcedo M.A.,Campo Experimental Valle de Apatzingan |
Orona-Castro F.,Campo Experimental Edzna |
Cerna-Chavez E.,Antonio Narro Agrarian Autonomous University |
And 2 more authors.
Southwestern Entomologist | Year: 2012
The objectives of this study in late 2008 to 2010 at San Antonio Cayal, Campeche, Mexico, were to determine the thrips species associated with inflorescences and leaves and the fluctuation of thrips in abundance on mango, Mangifera spp. Four species of thrips were found in inflorescences and two species in foliage. The phytophagous species of thrips Heliothrips haemorrhoidalis Bouch, Frankliniella Invasor Sakimura, Frankliniella occidentalis Pergande, and Frankliniella sp. (undescribed), and the predator mites Leptothrips macconeli (DL Crawford), and Leptothrips macro-cellatos Wakson were observed. Abundance of nymph and adult thrips per leaf ranged from 0.0 to 0.33 on several sampling dates, with 0.14 adults per leaf during the month of May. In 2010 zero adult and nymph thrips were recorded as in 2009 on several sampling dates, with most nymph and adult thrips per leaf (0.05 each) found in the month of April.