NZPPS   ·  Journal home   ·   Past issues  ·  This volume   ·   Previous abstract   ·   Next abstract



New Zealand Plant Protection 62 (2009): 19-27

Endophyte-infected meadow fescue and loline alkaloids affect Argentine stem weevil larvae

A.J. Popay, B.A. Tapper and C. Podmore

ABSTRACT

In a meadow fescue plant assay, a lower percentage of tillers on endophyte-infected (E+) than endophyte-free (Eľ) plants on which eggs had been laid were damaged by Argentine stem weevil (ASW) larvae. There were indications of endophyte-mediated toxicity to young larvae. The percentage of damaged tillers on Eľ and E+ plants without ASW eggs was similar when they were planted alongside a plant with eggs, but severity of damage was less on E+ plants. In an artificial diet experiment, eggs took 2-3 days longer to hatch on an alkaloid-free diet than on diets containing either of two loline alkaloids produced by E+ meadow fescue. Growth and development of larvae was reduced by up to 36% at two higher concentrations of N-formyl loline (NFL) relative to the lowest concentration, and to a lesser extent by N-acetyl norloline. Larval survival declined with increasing concentrations of both alkaloids, with the highest mortality occurring at the two higher concentrations of NFL.

Keywords: N-formyl loline, N-acetyl norloline, Listronotus bonariensis, Neotyphodium uncinatum, Lolium pratense.

Related articles
pdfFeeding and oviposition by Argentine stem weevil on EpichloŰ uncinata-infected, loline-containing Festulolium
G.M. Barker, B.J. Patchett, T.J. Gillanders, G.S. Brown, S.J.Y. Montel and N.E. Cameron (2015)
New Zealand Plant Protection 68: 212-217
pdfArgentine stem weevil adults are affected by meadow fescue endophyte and its loline alkaloids
J.G. Jensen, A.J. Popay and B.A. Tapper (2009)
New Zealand Plant Protection 62: 12-18
pdfEndophyte-infected Festuca pratensis containing loline alkaloids deters feeding by Listronotus bonariensis
B.J. Patchett, R.B. Chapman, L.R. Fletcher and S.R. Gooneratne (2008)
New Zealand Plant Protection 61: 205-209
pdfRoot loline concentration in endophyteinfected meadow fescue (Festuca pratensis) is increased by grass grub (Costelytra zealandica) attack
B.J. Patchett, R.B. Chapman, L.R. Fletcher and S.R. Gooneratne (2008)
New Zealand Plant Protection 61: 210-214
pdfThe effect of endophyte (Neotyphodium uncinatum) in meadow fescue on grass grub larvae
A.J. Popay, R.J. Townsend and L.R. Fletcher (2003)
New Zealand Plant Protection 56: 123-128
pdfThe effects of Neotyphodium endophytes in tall fescue on pasture mealy bug (Balanococcus poae)
C. Pennell and O.J.-P. Ball (1999)
Proceedings of the NZ Plant Protection Conference 52: 259-263
pdfThe production of loline alkaloids in artificial and natural grass/endophyte associations
O.J.-P Ball and B.A. Tapper (1999)
Proceedings of the NZ Plant Protection Conference 52: 264-269
pdfThe effects of lolitrem B on Argentine stem weevil larvae
J.J. Dymock, R.A. Prestidge and D.D. Rowan (1989)
Proceedings of the NZ Weed and Pest Control Conference 42: 73-75
pdfLolitrem B - a stem weevil toxin isolated from Acremonium-infected ryegrass
R.A. Prestidge and R.T. Gallagher (1985)
Proceedings of the NZ Weed and Pest Control Conference 38: 38-40

Copyright © 2009 New Zealand Plant Protection Society (Inc.).

Please refer to the terms of use.