Estudio preliminar de los efectos letales y sub-letales de extractos etanólicos de cuatro especies xerófitas del altiplano chileno contra Tetranychus cinnabarinus (Acarina: Tetranychidae)
Lethal and sublethal effects of ethanolic extracts of four original plants of the high Andes of Chilean desert (Baccharis tola Phil., Fabiana densa J. Remy, Lampayo medicinalis F. Phil. and Azorella compacta Phil.) were studied at 26 ± 2°C and 70 ± 10% of RH with a photoperiod of 16:8 h (L:D)...
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| Publicado en: | Revista de la Facultad de Ciencias Agrarias |
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| Autores principales: | , |
| Materias: | |
| Acceso en línea: | https://bdigital.uncu.edu.ar/fichas.php?idobjeto=7391 |
| Sumario: | Lethal and sublethal effects of ethanolic
extracts of four original plants of the high
Andes of Chilean desert (Baccharis tola Phil.,
Fabiana densa J. Remy, Lampayo medicinalis
F. Phil. and Azorella compacta Phil.) were
studied at 26 ± 2°C and 70 ± 10% of RH with a
photoperiod of 16:8 h (L:D) on adults and eggs
of Tetranychus cinnabarinus (Boisduval) (Acari:
Tetranychidae). The highest mortalities of adults
by contact were obtained with A. compacta (10%
w/v), L. medicinalis (10% (w/v) and A. compacta
(7.5% w/v) which no showed significant
differences (p< 0.05) compared with the control
treatment (spirodiclofen). The lowest LC50 was
obtained by F. densa (0.71% w/v), followed by
L. medicinalis (0.98% w/v). Azorella compacta
(5.10% w/v) showed the lowest LC90 and the
highest efficiency with a coefficient of 3.21
(CL90/ CL50). Lampayo medicinalis (10% w/v)
produced the highest percentage of unhatched
eggs with 73.15%. Bacharis tola (7% w/v)
exhibited the highest toxicity by residual effect
with a mortality of 57.8% of T. cinnabarinus
adults. Fabiana densa maintained its repellent
effect for 72 hours. Lampayo medicinalis, B.
tola and A. compact slightly lost their repellent
activity over time. |
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