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Romanian Journal of Biology - Zoology
ROMANIAN ACADEMY |
EFFECT OF TEMPERATURE ON THE VIRULENCE OF ENTOMOPATHOGENIC NEMATODES
MANANA LORTKIPANIDZE*, OLEG GORGADZE*, KAZIM HUSEYNOV**, MZIA KOKHIA*, MADONA KUCHAVA*
Abstract:
Nowadays, the use of entomopathogenic nematodes as a biological control agent is a key component in IPM system. Entomopathogenic nematodes of the genera Steinernema and Heterorhabditis (Nematoda: Rhabditida) are extraordinarily lethal to many important insect pests, yet are safe for plants and animals. They are the only insect-parasitic nematodes possessing an optimal balance of biological control attributes. The effect of temperature on the virulence of three speciesof entomopathogenic nematodes, Steinernema thesami, Heterorhabditis bacteriophora and Steinernema feltiae was investigated. Last instar of Tenebrio molitor Linnaeus, 1758 larvae were choosing for experiment. In the laboratory, all three nematode species successfully reproduced inside T. molitor larvae, H. bacteriophora produced the highest number of infective juveniles per larva at 30°C than S. feltiae and S. thesami. S. feltiae caused the highest mortality of larvae at 20°C, whereas S. thesami infected T. molitor larvae at the widest temperature range and killed insects between 10-33°C. Based on the present study, we indicate that entomopathogenic nematodes have well-defined thermal breadths for their development and reproduction.
Citation:
MANANA LORTKIPANIDZE*, OLEG GORGADZE*, KAZIM HUSEYNOV**, MZIA KOKHIA*, MADONA KUCHAVA*, 2019. EFFECT OF TEMPERATURE ON THE VIRULENCE OF ENTOMOPATHOGENIC NEMATODES, Romanian Journal of Biology - Zoology, 64(1-2): 39–44.
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