Control biológico del gusano cogollero de maíz Spodoptera frugiperda (SMITH) con liberaciones de Telenomus remus Nixon el valle de Casanga Paltas
The research had the objective of contributing to the biological control of the corn fall armyworm Spodoptera frugiperda, with releases of Telenomus remus to decrease the damage and the populations of the plague insect. Since currently, corn production is threatened by the presence of pests, especia...
Kaydedildi:
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| Materyal Türü: | bachelorThesis |
| Dil: | spa |
| Baskı/Yayın Bilgisi: |
2013
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| Konular: | |
| Online Erişim: | http://dspace.unl.edu.ec/jspui/handle/123456789/11386 |
| Etiketler: |
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Etiketle | Özet: | The research had the objective of contributing to the biological control of the corn fall armyworm Spodoptera frugiperda, with releases of Telenomus remus to decrease the damage and the populations of the plague insect. Since currently, corn production is threatened by the presence of pests, especially the insect Spodoptera frugiperda, the damage is done from the beginning of the development of the plant even before the harvest, influencing in the performance and in production costs. A temporary insectarium was established to rear both host and parasite, the foot of rearing of the parasitoid was facilitated by the Experimental Station of the South Coast "Dr. Enrique Ampuero", also it was installed a corn trial with three treatments each one with different periods of release: every 7, 15, 30 days with 41 individuals per plot, in addition to the witness treatment without releases and control distributed in a design of complete randomized blocks with five replications for the comparison of means, was used the Tukey test, at 5 % of probability. The best results occurred in the treatment where it was released every seven days (T1), with less damage to the heart, male flower and cob, a lower population of larvae obtaining greater plant height, less days to the appearance of the male flower, larger number of cobs and better performance. The highest percentage of parasitism corresponds to the release of every 15 days (T2), followed by T1. The population of attacked plants with presence of larvae and egg masses of the plague insect remained low with a tendency to decrease, in the T1, T2 and T3, treatments that had a minimal cob and male flower damage. According to the set out objectives and results obtained, it was concluded that the most effective treatment for the control of S. frugiperda was T1 where an efficient control of the pest was obtained, in addition it determines the lower persistence of S. frugiperda. |
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