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Chilean Journal of Agricultural Research
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0718-5820
EISSN: 0718-5839
Vol. 74, No. 1, 2014, pp. 123-126
Bioline Code: cj14019
Full paper language: English
Document type: Note
Document available free of charge

Chilean Journal of Agricultural Research, Vol. 74, No. 1, 2014, pp. 123-126

 en Susceptibility of Spodoptera frugiperda check for this species in other resources and Helicoverpa gelotopoeon check for this species in other resources (Lepidoptera: Noctuidae) to the entomopathogenic nematode Steinernema diaprepesi check for this species in other resources (Rhabditida: Steinernematidae) under laboratory conditions
Caccia, Milena G.; Del Valle, Eleodoro; Doucet, Marcelo E. & Lax, Paola

Abstract

Spodoptera frugiperda check for this species in other resources Smith and Helicoverpa gelotopoeon check for this species in other resources (Dyar) are important agricultural pests of several crops. The aim of the present work was to evaluate the susceptibility of larvae of both insects to an isolate of Steinernema diaprepesi check for this species in other resources Nguyen & Duncan under laboratory conditions, as well as the capacity of the nematode to multiply on lepidoterans. Larvae (n = 15) were exposed to 0 (control), 50, and 100 infective juveniles (IJs) per Petri dish. Mortality was evaluated every 24 h during 6 d, and emerging IJs were counted. Mortality of S. frugiperda was 93% and 100% with 50 and 100 IJs dosage, and 87% and 93% in H. gelotopoeon, respectively. The production of IJs was significantly different between doses (P ≤ 0.05) for S. frugiperda (11 329 with 50 IJs vs. 27 155 with 100 IJs) but not for H. gelotopoeon (19 830 vs. 26 361, respectively). This is the first study evaluating the susceptibility of these lepidopterans to S. diaprepesi. These results encourage the possibility of using this nematode for biological control of both pests.

Keywords
Infective juveniles; biological control

 
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