Effects of 20 fungicides on the infectivity of conidia of the aphid entomopathogenic fungus Erynia neoaphidis
- Latteur, G. & Jansen, J.P. (2002). Effects of 20 fungicides on the infectivity of conidia of the aphid entomopathogenic fungus Erynia neoaphidis. Biocontrol, 47: (4), 435-444.
|Title||Effects of 20 fungicides on the infectivity of conidia of the aphid entomopathogenic fungus Erynia neoaphidis|
|Label||jansen 2002 tap 526|
|Endnote Keywords||aphid, Entomophthoraceae, Erynia neoaphidis, fungicide, infectivity|
|Abstract||The effect of 20 fungicides on the infectivity of conidia of the entomopathogenic fungus, Erynia neoaphidis, were assessed in the laboratory. After projection on broad bean leaves, conidia were treated with fungicides applied at their recommended field rate. Afterwards, the infectivity of these inocula was assessed using an aphid bioassay. Four fungicides, carbendazim, kresoxym-methyl, nuarimol and thiophanate-methyl reduced the infectivity of the conidia by less than 25% and can be considered harmless for this aphid pathogen. Propiconazole was a little more toxic, with 37% reduction. Other products reduced infectivity by between 50% and 100%. These are, from the least to the most toxic: flutriafol, prochloraz, epoxyconazole, iprodione, hexaconazole, triadimenol, azoxystrobine, cyproconazole, cyprodynil, flusilazole and tridemorph. Chlorothalonil, fenpropimorph, spiroxamine and tebuconazole totally inhibited infectivity of the fungi. Analysis of the results according to chemical class showed that the benzimidazoles were the least toxic for E. neoaphidis and the morpholines the most toxic. Effects of triazoles and strobilurines were variable, with reduction ranging from 37% to 100% for triazoles and from 17% to 68% for strobilurines.|
|Author address||Minist Small Enterprises Traders & Agr, Agr Res Ctr, Dept Biol Control & Plant Genet Resources, B-5030 Gembloux, BelgiumJANSEN, JP, MINIST SMALL ENTERPRISES TRADERS & AGR, AGR RES CTR, DEPT BIOL CONTROL & PLANT GENET RESOURCES, 2 CHEMIN LIROUX, B-5030 GE|
|Authors||Latteur, G. & Jansen, J.P.|