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Survival and Infectivity of the Insect-Parasitic Nematode Heterorhabditis bacteriophora Poinar in Solutions Containing Four Different Turfgrass Soil Surfactants.

Hoctor TL, Gibb TJ, Bigelow CA, Richmond DS - Insects (2012)

Bottom Line: Infective juvenile H. bacteriophora were added to solutions containing each of the four surfactants, and nematode viability and infectivity were monitored over time.Results also imply that tank-mixing of EPNs with most turfgrass soil surfactants should not pose a significant risk to the nematodes.The influence of soil surfactants on EPN performance remains to be examined in the field.

View Article: PubMed Central - PubMed

Affiliation: Department of Entomology, Purdue University, West Lafayette, IN 47907, USA. tlhoctor@ncsu.edu.

ABSTRACT
This laboratory study examined viability and infectivity of the entomopathogenic nematode (EPN) Heterorhabditis bacteriophora Poinar in solutions containing four different turfgrass soil surfactants: Revolution (Aquatrols Corp., Paulsboro, NJ), Aqueduct (Aquatrols Corp., Paulsboro, NJ), Cascade Plus (Precision Laboratories Inc., Waukegan, IL) and OARS (Aqua-Aid Inc., Rocky Mount, NC). Infective juvenile H. bacteriophora were added to solutions containing each of the four surfactants, and nematode viability and infectivity were monitored over time. In one of two trials, nematode survival in solutions containing the surfactants Aqueduct and Cascade Plus was consistently higher compared to the water control and solutions containing Revolution or OARS. Surfactants had no significant influence on nematode infectivity in either trial. Findings indicate that most of the common turfgrass soil surfactants examined should be compatible with EPNs and that some may potentially enhance nematode survival. Results also imply that tank-mixing of EPNs with most turfgrass soil surfactants should not pose a significant risk to the nematodes. The influence of soil surfactants on EPN performance remains to be examined in the field.

No MeSH data available.


Related in: MedlinePlus

Mean (±SE) number of live infective juvenile Heterorhabditis bacteriophora Poinar per 40 µL sample taken from Petri dishes containing one of four different surfactant solutions or water over the course of 12 days. Means with the same letter are not significantly different at α = 0.05. Comparisons at 6 days described by lower-case letters and comparisons at 12 days described by upper-case letters.
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insects-04-00001-f001: Mean (±SE) number of live infective juvenile Heterorhabditis bacteriophora Poinar per 40 µL sample taken from Petri dishes containing one of four different surfactant solutions or water over the course of 12 days. Means with the same letter are not significantly different at α = 0.05. Comparisons at 6 days described by lower-case letters and comparisons at 12 days described by upper-case letters.

Mentions: Nematode survival varied significantly among the surfactant treatments (F = 2.97; df = 8.66; P = 0.007) (Figure 1). Six days after being added to the experimental solutions, EPN survival in Aqueduct®, Cascade Plus™, and OARS® solutions was significantly higher compared to the water control (P < 0.05). Survival in the Revolution® solution on day six was not significantly different from the water control (P > 0.05). At 12 days, the Aqueduct® and Cascade Plus™ solutions resulted in significantly higher EPN survival than the water control. Although nematode survival in the Revolution® solution was significantly lower than the OARS® solution (P > 0.05), neither of these solutions resulted in nematode survival that was significantly different from the water control (P < 0.05).


Survival and Infectivity of the Insect-Parasitic Nematode Heterorhabditis bacteriophora Poinar in Solutions Containing Four Different Turfgrass Soil Surfactants.

Hoctor TL, Gibb TJ, Bigelow CA, Richmond DS - Insects (2012)

Mean (±SE) number of live infective juvenile Heterorhabditis bacteriophora Poinar per 40 µL sample taken from Petri dishes containing one of four different surfactant solutions or water over the course of 12 days. Means with the same letter are not significantly different at α = 0.05. Comparisons at 6 days described by lower-case letters and comparisons at 12 days described by upper-case letters.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4553426&req=5

insects-04-00001-f001: Mean (±SE) number of live infective juvenile Heterorhabditis bacteriophora Poinar per 40 µL sample taken from Petri dishes containing one of four different surfactant solutions or water over the course of 12 days. Means with the same letter are not significantly different at α = 0.05. Comparisons at 6 days described by lower-case letters and comparisons at 12 days described by upper-case letters.
Mentions: Nematode survival varied significantly among the surfactant treatments (F = 2.97; df = 8.66; P = 0.007) (Figure 1). Six days after being added to the experimental solutions, EPN survival in Aqueduct®, Cascade Plus™, and OARS® solutions was significantly higher compared to the water control (P < 0.05). Survival in the Revolution® solution on day six was not significantly different from the water control (P > 0.05). At 12 days, the Aqueduct® and Cascade Plus™ solutions resulted in significantly higher EPN survival than the water control. Although nematode survival in the Revolution® solution was significantly lower than the OARS® solution (P > 0.05), neither of these solutions resulted in nematode survival that was significantly different from the water control (P < 0.05).

Bottom Line: Infective juvenile H. bacteriophora were added to solutions containing each of the four surfactants, and nematode viability and infectivity were monitored over time.Results also imply that tank-mixing of EPNs with most turfgrass soil surfactants should not pose a significant risk to the nematodes.The influence of soil surfactants on EPN performance remains to be examined in the field.

View Article: PubMed Central - PubMed

Affiliation: Department of Entomology, Purdue University, West Lafayette, IN 47907, USA. tlhoctor@ncsu.edu.

ABSTRACT
This laboratory study examined viability and infectivity of the entomopathogenic nematode (EPN) Heterorhabditis bacteriophora Poinar in solutions containing four different turfgrass soil surfactants: Revolution (Aquatrols Corp., Paulsboro, NJ), Aqueduct (Aquatrols Corp., Paulsboro, NJ), Cascade Plus (Precision Laboratories Inc., Waukegan, IL) and OARS (Aqua-Aid Inc., Rocky Mount, NC). Infective juvenile H. bacteriophora were added to solutions containing each of the four surfactants, and nematode viability and infectivity were monitored over time. In one of two trials, nematode survival in solutions containing the surfactants Aqueduct and Cascade Plus was consistently higher compared to the water control and solutions containing Revolution or OARS. Surfactants had no significant influence on nematode infectivity in either trial. Findings indicate that most of the common turfgrass soil surfactants examined should be compatible with EPNs and that some may potentially enhance nematode survival. Results also imply that tank-mixing of EPNs with most turfgrass soil surfactants should not pose a significant risk to the nematodes. The influence of soil surfactants on EPN performance remains to be examined in the field.

No MeSH data available.


Related in: MedlinePlus