Variability in foraging behaviour, thermal requirement and virulence of entomopathogenic nematodes against sod webworm, Herpetogramma phaeopteralis Gueneè (Lepidoptera: Crambidae)

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Authors

  • M. Nagesh
     ICAR-National Bureau of Agricultural Insect Resources, P. B. No. 2491, H. A. Farm Post, Bellary Road, Hebbal, Bangalore − 560 024, Karnataka ,IN
  • M. Balachander
     ICAR-National Bureau of Agricultural Insect Resources, P. B. No. 2491, H. A. Farm Post, Bellary Road, Hebbal, Bangalore − 560 024, Karnataka ,IN
  • T. M. Shivalingaswamy
     ICAR-National Bureau of Agricultural Insect Resources, P. B. No. 2491, H. A. Farm Post, Bellary Road, Hebbal, Bangalore − 560 024, Karnataka ,IN
  • J. Patil
     ICAR-National Bureau of Agricultural Insect Resources, P. B. No. 2491, H. A. Farm Post, Bellary Road, Hebbal, Bangalore − 560 024, Karnataka ,IN
  • A. N. Shylesha
     ICAR-National Bureau of Agricultural Insect Resources, P. B. No. 2491, H. A. Farm Post, Bellary Road, Hebbal, Bangalore − 560 024, Karnataka ,IN
  • A. Raghavendra
     ICAR-National Bureau of Agricultural Insect Resources, P. B. No. 2491, H. A. Farm Post, Bellary Road, Hebbal, Bangalore − 560 024, Karnataka ,IN

DOI:

https://doi.org/10.18311/jbc/2019/23512

Keywords:

Degree-days, foraging, Herpetogramma phaeopteralis, Heterorhabditis indica, H. bacteriophora, sod webworm, Steinernema abbasi, thermal requirement, turfgrass, virulence, variability
Entomopathogenic

Abstract

Variability in virulence among entomopathogenic nematodes, Heterorhabditis indica, H. bacteriophora and Steinernema abbasi, was studied for lethality, foraging behaviour in response to host volatiles, thermal requirements (degree-days), recyclability, persistence and field efficacy against Turfgrass Sod Webworm (TSW), Herpetogramma phaeopteralis. Comparatively, lethal concentration and time were lowest for H. indica against TSW. Recyclability of EPN ranged from 3.42 í— 105 to 4.23 í— 105 IJs g1 of TSW. H. bacteriophora recorded highest movement rate on agar (0.38–0.78cm) and sand-agar (0.45–0.56cm), followed by S. abbasi, and H. indica. Responding to TSW volatiles, S. abbasi recorded maximum movement, H. bacteriophora, moderate, and H. indica, lowest. Heterorhabditis indica (with nictitation); S. abbasi and H. bacteriophora (without nictitation) were ambusher and cruiser, respectively. S. abbasi preferred warmer temperatures (30–33°C), H. bacteriophora, moderate (24–27°C), and H. indica, a wider range (24–30°C), for virulence based on thermal requirement. In field, EPNs were comparable to chlorpyriphos against TSW. We demonstrated the complementarity of thermal preferences of EPNs and insect pest was critical besides attributes like foraging behaviour, recyclability, persistence, and lethality values for their success in the field.

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Published

2019-05-24

How to Cite

Nagesh, M., Balachander, M., Shivalingaswamy, T. M., Patil, J., Shylesha, A. N., & Raghavendra, A. (2019). Variability in foraging behaviour, thermal requirement and virulence of entomopathogenic nematodes against sod webworm, <i>Herpetogramma phaeopteralis</i> Gueneè (Lepidoptera: Crambidae). Journal of Biological Control, 33(1), 36–47. https://doi.org/10.18311/jbc/2019/23512

Issue

Volume 33, Issue 1, March 2019

Section

Research Articles
Crossref
Scopus
Google Scholar
Europe PMC
Received 2019-04-04
Accepted 2019-04-29
Published 2019-05-24

 

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