Effect of Paecilomyces Lilacinus Strain 251 on the Survival and Virulence of Entomopathogenic Nematodes under Laboratory Conditions
نویسنده
چکیده
maceae) is a nematophagous fungus that has been shown to be effective against a wide spectrum of plantparasitic nematodes (Rumbos and Kiewnick, 2006). The commercial strain 251 (PL251) has recently received US registration as a biological nematicide under the trade name MeloCon WG, whereas it is undergoing registration procedure as BioAct WG in Europe (Kiewnick and Sikora, 2006). Entomopathogenic nematodes (EPNs) (Rhabditida: Steinernematidae, Heterorhabditidae) are biocontrol agents used for the control of a broad spectrum of soildwelling insect pests (Kaya and Gaugler, 1993). Infective juveniles (IJ) of EPNs are applied to soil, where they locate and kill their hosts. EPNs are highly virulent and provide a high level of protection, can be mass-produced, formulated and easily applied with conventional equipment, and are safe to vertebrates, plants and other non-target organisms. Due to these advantages, EPNs have attracted much interest and nowadays a number of species are commercially available and widely used in many crops. Modern agriculture practices often demand the application of diverse control measures for effective pest and disease control. In many cases, management strategies overlap spatially and temporally, resulting in interactions between the control agents that can affect their efficacy, either synergistically or antagonistically. Information on the compatibility of biological control agents (BCAs) and their interaction if used simultaneously is valuable and lately has stimulated a lot of scientific interest (De Nardo and Grewal, 2003; Krauss et al., 2004). Recent research demonstrated the compatibility of PL251 with important biocontrol agents, such as arbuscular mycorrhiza (Rumbos et al., 2006). However, only limited information is available concerning possible interactions of PL251 when co-applied with EPNs. Earlier studies, using a previous commercial preparation of PL251, suggested that PL251 might pose a slight risk to EPNs when used at normal field doses (Holland, 2000). Recent advances in solid state fermentation and formulation of PL251 compared to previous products of this strain (Kiewnick, 2001) make it necessary to evaluate the compatibility of the present PL251 formulation with EPNs. Therefore, the objective of the present study was to investigate the effect of the current, commercial preparation of P. lilacinus strain 251 on the survival and virulence of Steinernema feltiae Filipjev, Heterorhabditis bacteriophora Poinar and H. megidis Poinar, Jackson et Klein used against Galleria mellonella L. (Lepidoptera: Galleridae) under laboratory conditions.
منابع مشابه
Effect of storage conditions on the survival of two potential biocontrol agents of nematodes, the fungi Paecilomyces lilacinus and Pochonia chlamydosporia
Biocontrol Science and Technology Publication details, including instructions for authors and subscription information: http://www.informaworld.com/smpp/title~content=t713409232 Effect of storage conditions on the survival of two potential biocontrol agents of nematodes, the fungi Paecilomyces lilacinus and Pochonia chlamydosporia Weijun Duan ab; Ence Yang ab; Meichun Xiang a; Xingzhong Liu a a...
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