Examinando por Materia "Chinche de encaje"

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    PublicaciónAcceso abierto
    Erinnyis ello (Lepidoptera: Sphingidae) and Leptopharsa heveae (Hemiptera: Tingidae) in Hevea brasiliensis in agroforestry system.
    (Universidad del Valle, 2016-12-30) Sterling, Armando; Salas Tobón, Yasodhara Marieth; Virgüez Díaz, Yeny; Sociedad Colombiana de Entomología - Socolen; Universidad del Valle
    Hornworm (Erinnyis ello) and lace bug (Leptopharsa heveae) are considered the most important pests of rubber tree (Hevea brasiliensis). This study aimed to evaluate incidence and abundance of E. ello and L. heveae in three rubber tree clones (two promising clones and control IAN 873) in different planting systems with copoasu trees (Theobroma grandiflorum) and banana trees (Musa AAB) in two localities of Caquetá (Colombian Amazonia). A completely randomized design with three replications and split-plot arrangement, analyzed with a general linear mixed model, was used in each locality. Very low means of incidence and abundance in both of E. ello (< 5 % and < 1 insect per 100 leaflets per plant) and L. heveae (< 7 % and < 2 insects per plant per leaflet) were found for all factors studied, after 23 months of monitoring (six rainfall seasons). It was concluded that the incidence and abundance of E. ello and L. heveae in H. brasiliensis, are influenced not only by spatial and temporal variation, but also by implemented planting system, given by the fact the insect pests are present in the same rainfall season. Similarly, a season effect was observed in clonal reaction to L. heveae, where the clone FDR 5788 was the most tolerant for the four planting systems evaluated in this research
  • Miniatura
    PublicaciónAcceso abierto
    Use of generalized linear models in the Leptopharsa gibbicarina (Hemiptera: Tingidae) count in oil palm.
    (Universidad del Valle, 2021-02-03) Mesa Fúquen, Eloina; Hernández Henández, Juan Sebastián; Campero, Jhonatan Eduardo; Sociedad Colombiana de Entomología - Socolen; Universidad del Valle; Montoya Lerma, James
    The analysis of data coming from the counting of events must consider tools that are appropriate to deal with this type of variable. A valid approach to cope with this task consists of using the Generalized Linear Model (GLM). The use of GLM allows working with density functions such as Poisson or Negative Binomial. This work presents the results of analyzing the data from an experiment carried out at the Research Station of Cenipalma located in the municipality of Barrancabermeja (Colombia). The experiment was established to evaluate, at the field level, the entomopathogenic fungus Purpureocillium lilacinum as a strategy to control the population of the lace bug, Leptopharsa gibbicarina. The experiment was carried out in two plots, in one of them, the control of L. gibbicarina with P. lilacinum was implemented as suggested by the Entomology research program of Cenipalma and, in the other plot there was no control strategy. The data were analyzed by using GLM and two different density functions (Poisson and the negative binomial). Results showed statistically significant differences between the treatments. The estimator of the maximum likelihood associated with the P. lilacinum treatment indicated that the application of the entomopathogenic fungus reduced the populations of L. gibbicarina with a rate of incidence of 0.28 times more than the control.