Examinando por Materia "Wasps"

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    Effect of insecticides on Liriomyza sativae (Diptera: Agromyzidae) and its parasitoids in bean, Phaseolus vulgaris.
    (Universidad del Valle, 2017-06-30) Chirinos, Dorys T.; Sociedad Colombiana de Entomología - Socolen; Universidad del Valle
    Liriomyza sativae a notoriously polyphagous leafminer species, is one of the main causes of insecticide applications in the bean, Phaseolus vulgaris in Ecuador. However, there are several species of parasitoids associated with this insect which generally regulate its populations when there is no interference due to insecticide applications. Two studies in “El Misionero” Experimental Center, Guayas, Ecuador, where conducted in order to evaluate the importance of natural biological control by these parasitoids. In one of them, the population fluctuation of L. sativae and the incidence of its parasitoids were assessed on an insecticide free plot. In the other, the same factors were assessed in a field experiment comparing two treatments: 1. without insecticide applications and 2. with weekly applications of a commercial formulation of lambda cihalotrin + thiametoxam. Diversity of parasitoids associated with this leaf miner were observed in both cases. In the first study, low infestation (1.8 mines.leaflet-1) and high percentage of parasitism in mines (70.5 %) were observed. In the experiment the general averages of active larvae and percentages of parasitism resulted 11.8 ± 2.9 and 23.3 ± 5.0 % vs. 3.1 ± 0.8 and 61.8 ± 7.7 % for treated and untreated plants respectively. Three species of larval parasitoids, Closterocerus sp., Chrysocharis sp. and Neochrysocharis sp. (Hymenoptera: Eulophidae) and the larva-puparium parasitoid Ganaspidium sp. (Hymenoptera: Figitidae) were detected. The results show the importance of parasitoids as regulators of L. sativae populations and the interference on natural biological controls by the indiscriminate applications of insecticides.
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    PublicaciónAcceso abierto
    Influence of color and height of pan traps to capture braconids (Hymenoptera: Braconidae)
    (Universidad del Valle, 2016-12-30) Mena Mociño, Laura Verónica; Pineda Guillermo, Samuel; Martínez Castillo, Ana Mabel; Gómez Ramos, Benjamín; Lobit, Philippe Christian; Ponce Saavedra, Javier; Figueroa-de La Rosa, José Isaac; Sociedad Colombiana de Entomología - Socolen; Universidad del Valle
    The aim of this study was to determine the effectiveness of capturing braconids (Hymenoptera: Braconidae) on yellow, blue, cream, and green pan traps at two heights (0 and 90 cm) for a period of four weeks in the Natural Protected Area “Cerro Punhuato”, (Morelia, Michoacan, Mexico). The reflectance of each color was measured with a field analytical spectrophotometer. One hundred four (104) specimens, belonging to 14 subfamilies and 28 genera, were collected. Yellow and green pan traps caught the largest number of specimens and the greatest diversity of genera, showing 56.5 % similarity, as estimated with the Bray-Curtis index. Yellow pan traps installed at ground level exceeded the capture in green pan traps. The level of reflectance of the green and yellow pan traps was in the range from 360 to 530 nm, possibly indicating that this is the wavelength range in which braconids are attracted to both colors
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    PublicaciónAcceso abierto
    New records of fruit flies (Diptera: Tephritidae) in the Alagoas State, Brazil.
    (Universidad del Valle, 2019-08-30) Silva Da Costa, Simone; Dos Santos, Jakeline Maria; Forti Broglio, Sônia Maria; Silva Dias Pini, Nivia Da; Gómez Torres, Mariuxi; Sociedad Colombiana de Entomología - Socolen; Universidad del Valle; Montoya Lerma, James
    The aim of this study was to determine the diversity of fruit flies, their hosts and parasitoids in the State of Alagoas, Brazil. A total of 17,394 specimens of frugivore insects where recorded, of which 14,993 (86.2 %) belonged to the genus Anastrepha (7,224 females and 7,769 males) and 2,401 (13.8 %) belonged to Ceratitis (1,196 females and 1,205 males). In Maceió, a new species of Anastrepha, which so far has been referred to as “morpho-species of Anastrepha sp.”, has been collected. Besides showing the highest number of females collected during this study, Anastrepha obliqua was associated with the highest number of host species (eight species). Parasitoid emergence was associated with only 9 of the 19 fruit species infested with fruit flies. From all pupae of Anastrepha obtained in this study (26,724), 6,125 parasitoid specimens have emerged, with 5,870 corresponding to Braconidae, 169 to Pteromalidae, 78 to Figitidae and 8 to Torymidae. In this study the emergence of parasitoids from puparia of Ceratitis was not recorded.