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Chilean Journal of Agricultural Research
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0718-5820
EISSN: 0718-5839
Vol. 68, No. 1, 2008, pp. 21-30
Bioline Code: cj08003
Full paper language: English
Document type: Research Article
Document available free of charge

Chilean Journal of Agricultural Research, Vol. 68, No. 1, 2008, pp. 21-30

 en Effect of Two Entomopathogenic Fungi in Controlling Aleurodicus Cocois check for this species in other resources (Curtis, 1846) (Hemiptera: Aleyrodidae)
del Prado, Elizabeth Núñez; Iannacone, José & Gómez, Hilda

Abstract

Aleurodicus cocois check for this species in other resources (Curtis, 1846), the coconut whitefly, is a very damaging pest in Peru, mainly in avocado trees ( Persea americana Mill. check for this species in other resources ). It has been determined that entomopathogenic fungi can infect and kill white flies and can be used as biological control agents. The object of this research was to determine if there is any synergic action of the entomopathogenic fungi Paecilomyces fumosoroseus check for this species in other resources (Wize) Brown & Smith 1957 and Verticillium lecanii check for this species in other resources (Zimmerman, 1892) Viégas 1939, in controlling A. cocois. Plastic sterile dishes were prepared where 5 mL 2% agar were used for each stage; leaves infested with A. cocois were placed upon these. Three different treatments were applied by sprinkling: P. fumosoroseus (P), V. lecanii (V) or the mixture of the two fungi. These treatments were evaluated at one, two and seven days in the case of nymph I and eggs, and after four, eight and 12 days for nymph II, NIII and NIV. The lethal effect of V. lecanii on the second nymph instar of A. cocois was better than that of P. fumosoroseus and than the mixture of both fungi; the highest mortality percentage appeared from day eight to day 12. A small increase was observed in the effect of the mixture of the two entomopathogenic fungi on the IV nymph instar; and the effect of P. fumosoroseus was the lowest.

Keywords
biocontrol, Paecilomyces, pest, Verticillium, white flies.

 
 es Efecto de Dos Hongos Entomopatógenos en el Control de Aleurodicus Cocois check for this species in other resources (Curtis, 1846) (Hemiptera: Aleyrodidae)
del Prado, Elizabeth Núñez; Iannacone, José & Gómez, Hilda

Resumen

Aleurodicus cocois check for this species in other resources (Curtis, 1846), la mosca blanca del cocotero, constituye una plaga muy importante en el Perú, principalmente en el palto ( Persea americana Mill. check for this species in other resources ). Se ha determinado que los hongos entomopatógenos pueden infectar y matar a la mosca blanca, por lo que podrían ser usados como agentes de control biológico. El objetivo del presente trabajo fue determinar si existe alguna acción conjunta de dos hongos entomopatógenos Paecilomyces fumosoroseus check for this species in other resources (Wize) Brown & Smith 1957 y Verticillium lecanii check for this species in other resources (Zimmerman, 1892) Viégas 1939, en el control de A. cocois. Para ello se prepararon previamente placas de plástico estériles en las que se sirvieron aproximadamente 5 mL de agar al 2%, donde se colocaron hojas infestadas con A. cocois, aplicándose tres tratamientos por aspersión: P. fumosoroseus (P), V. lecanii (V) y la mezcla de los dos hongos, los cuales se evaluaron en el caso de Ninfa I y huevos después de uno, dos y siete días, y para la Ninfas II, NIII y NIV cada cuatro, ocho y 12 días. El efecto de mortalidad de V. lecanii sobre el segundo estadío ninfal de A. cocois fue mejor que P. fumosoroseus y que la mezcla de ambos hongos, ya que el mayor porcentaje de mortalidad se presentó desde el octavo día hasta el día 12. En el caso del IV estadío ninfal se observó un ligero incremento en el efecto al combinarse los dos hongos entomopatógenos evaluados, siendo menor el efecto en P. fumosoroseus.

Palabras-clave
control biológico, mosca blanca, Paecilomyces, plagas, Verticillium.

 
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