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1 August 2000 Susceptibility of Mocis latipes (Lepidoptera: Noctuidae) to Heterorhabditis bacteriophora (Rhabditida: Heterorhabditidae)
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Abstract

The susceptibility of larvae, prepupae, and pupae of the grass looper Mocis latipes (Guenée) to the entomopathogenic nematode Heterorhabditis bacteriophora (Poinar) NC strain was evaluated under laboratory conditions. Concentrations of 0, 5, 10, 20, 40, 60, and 120 nematodes per larva, applied in 1 ml of sterile-distilled water, were bioassayed, applying them to groups of 20 individuals of each instar, prepupa or pupa. Mortality was recorded daily for 5 d. All instars and the prepupal stage were the most susceptible to H. bacteriophora. Mortality ranged from 22.5 to 100%. Prepupae had 97.5–100% mortality starting at 10 nematodes per prepupa. Pupal mortality ranged from 27.5 to 41.3% as nematode concentration was increased. H. bacteriophora presented LC50 values that ranged between 5.26 and 37.66 nematodes per larva and LT50 values that ranged between 1.5 and 4.3 d. Results of this study suggest that H. bacteriophora has potential as a biocontrol agent against M. latipes.

Martín González-Ramírez, Roberto Lezama-Gutiérrez, Jaime Molina-Ochoa, Oscar Rebolledo-Domínguez, Marilú López-Edwards, and Alfonso Pescador-Rubio "Susceptibility of Mocis latipes (Lepidoptera: Noctuidae) to Heterorhabditis bacteriophora (Rhabditida: Heterorhabditidae)," Journal of Economic Entomology 93(4), (1 August 2000). https://doi.org/10.1603/0022-0493-93.4.1105
Received: 22 September 1999; Accepted: 1 April 2000; Published: 1 August 2000
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