ROLE OF THE SHEATH IN DESICCATION TOLERANCE OF TWO ENTOMOPATHOGENIC NEMATODES BY L. RICKERT CAMPBELL and R. GAUGLER Department of Entomology, Rutgers University, New Brunswick, NJ 08903, U.S.A. The free-living infective juveniles of entomopathogenic nematodes are ensheathed in the retained cuticle from the previous moult. Desiccation tolerance is essential for persistence in a soil environment and the sheath may have a protective function. We evaluated the role of the sheath in the desiccation tolerance of two species of entomopathogenic nematodes, Steinernema carpocapsae and Heterorhabditis bacteriophora. The sheath of H. bacteriophora was critical for survival at 97% relative humidity with 80.9% of sheathed infective juveniles surviving after 21 d versus 20.0% and 6.3% for exsheathed and chemically desheathed nematodes respectively. The sheath did not influence S. carpocapsae survival after 21 d at 97% relative humidity. In sand assays at 2, 4, 8 and 16% moisture levels, desheathed H. bacteriophora caused significantly less Galleria mellonella mortality than sheathed H. bacteriophora. No differences were found between the three S. carpocapsae treatments or sheathed H. bacteriophora. Our results indicate that the sheath plays an important role in desiccation tolerance of H. bacteriophora but has no effect on tolerance of S. carpocapsae. Keywords:
Nematologica – Brill
Published: Jan 1, 1991
Keywords: cuticle; Heterorhabditis bacteriophora; Steinernema carpocapsae
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera