Aspectos biológicos de especies de Trichogramma como agente de control biológico del gusano cogollero del maíz (Spodoptera frugiperda).
The species of the genus Trichogramma, recognized as parasitoids of S. frugiperda, are characterized by being micro wasps because they have an orange-yellow to blackish body color, their body length is 0.5 mm, the females have simple nail-shaped antennae and the males feathery antennae; The importan...
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| Format: | bachelorThesis |
| Publicat: |
2024
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| Matèries: | |
| Accés en línia: | http://dspace.utb.edu.ec/handle/49000/16024 |
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Afegir etiqueta | Sumari: | The species of the genus Trichogramma, recognized as parasitoids of S. frugiperda, are characterized by being micro wasps because they have an orange-yellow to blackish body color, their body length is 0.5 mm, the females have simple nail-shaped antennae and the males feathery antennae; The importance of these wasps is that they parasitize S. frugiperda eggs; especially the most frequently reported species is T. pretiosum. This research was developed as a non-experimental component of a bibliographic nature, through a technique of analysis, synthesis and summary of the information obtained. Based on the above, it was determined that the parasitoid Trichogramma sp. It is the most important insect for the control of S. frugiperda in corn crops; Its importance lies in its easy large-scale distribution and easy release into the open air. Trichogramma sp., is characterized by a microscopic wasp, 0.5 to 0.8 mm long, with partial markings on the dorsal side of the femur and dark metasosomes on the apical third; the males are darker in color, their antennae are long, thin and fuzzy; the female is lighter in color and has shorter and thicker antennae. Trichogramma sp. It is a short-lived parasitic wasp; In the first 24 hours after the eggs are laid, they hatch inside their host, become larvae and feed in the larval state for 5 days, pupate for 2 days and then they will be in their final state away from the host. Densities of 100,000 individuals/ha and 200,000 individuals/ha of Trichogramma sp. respectively, they can achieve parasitism percentages of 75.4% and 84.5%, values considered high; where some authors consider that the optimal dose is one whose density achieves a range of 60 to 90% parasitism on S. frugiperda eggs. The three parasitoid species T. atopovirilia, T. exiguum and T. pretiosum have a high percentage of parasitism between 80 and 85% on S. frugiperda eggs in corn crops. |
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