Examinando por Materia "Tablas de vida"

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  • Miniatura
    PublicaciónAcceso abierto
    Biology and reproductive parameters of Diaphorina citri (Hemiptera: Liviidae) in different Rutaceae hosts.
    (Universidad del Valle, 2017-12-30) Pérez Artiles, Lumey A.; Busoli, Antonio Carlos; Sotelo, Paola Andrea; Arcila, Angela M.; Sociedad Colombiana de Entomología - Socolen; Universidad del Valle
    This work aimed to study the biology and population parameters of Diaphorina citri in Rangpur and Citrumelo ‘Swingle’ rootstocks and in their combinations with orange scions in Araraquara, Sao Pablo. For the maintenance of a D. citri breeding stock, plants of Murraya exotica L. were used. In each treatment the duration of the biological stages of the pest, viability of the eggs, survival of egg to adult and sexual ratio were evaluated. Egg to adult development time ranged from 15.08 days in Pera / Rangpur to 16.5 days in Hamilim / Citrumelo ‘Swingle’. The highest viability of eggs (82.02 %) of D. citri was observed in the Valencia / Rangpur combination and the lowest in Hamilim / Citrumelo ‘Swingle’ (73.66 %). The egg-adult survival values ranged from 56.16 to 71.07 %, obtaining the lowest survival values in the Hamilim / Citrumelo ‘Swingle’ combination. The lowest mean oviposition (eggs for female) was observed in Citrumelo ‘Swingle’ (185.10). Based on the fertility chart, Rangpur had the highest net reproductive rate (Ro = 160.57) and the shortest generation time (31.54 days). The intrinsic growth rate was higher in the Valencia/Rangpur combination (0.1517). A positive and significant correlation was found between total oviposition and female longevity (R = 0.23440; P = 0.03649) and between the former variable and duration of oviposition period (0.39011, P = 0.0003). Citrumelo ‘Swingle’ and Hamilim / Citrumelo ‘Swingle’ were the treatments that most negatively affected the biological parameters studied mainly oviposition and survival
  • Miniatura
    PublicaciónAcceso abierto
    Morphometric of immatures and life tables of Bactericera cockerelli (Hemiptera: Triozidae) from populations of Northeastern Mexico.
    (Universidad del Valle, 2018-07-08) Cerna Chávez, Ernesto; Hernández Bautista, Omegar; Ochoa Fuentes, Yisa María; Landeros Flores, Jerónimo; Aguirre Uribe, Luis Alberto; Hernández Juárez, Agustín; Sociedad Colombiana de Entomología - Socolen; Universidad del Valle; Montoya Lerma, James
    Several parameters have been previously reported for Bactericera cockerelli biology that are influenced by the management, host and environmental conditions in which it develops. Therefore, the present study aimed to determine the population parameters of B. cockerelli from three field populations of northeastern Mexico and one laboratory population. Samples were collected in production areas of San Luis Potosi, Aguascalientes and Coahuila-Nuevo Leon, which were subsequently taken to a greenhouse and laboratory for data reading. The results show that the population from San Luis Potosi was the one that registered the highest number of eggs, with an average of 178.5 eggs at the time of revision, with the longest time required to complete the immature stage being 31.75 days; therefore, the longest time necessary for population doubling was an average of 11.07 days. The Aguascalientes population had the highest survival values, with 13 % of individuals reaching adulthood, as well as the parameters Σmx: 405, Ro: 10.53, rm: 0.089 y λ: 1.093. Finally, concerning fertility and pre-oviposition period, no significant differences between populations were recorded. The above demonstrates that populations exposed to selection pressure by pesticides change their population parameters.