Uncommon associations in target resistance among French populations of Myzus persicae from oilseed rape crops

Abstract

Within the framework of a molecular exploration of target resistance in populations of Myzus persicae on oilseed rapes in France, (1) the S431F mutation (coding gene ace2), although previously reckoned to be rare, revealed to be frequent, (2) M918L (phenotypically characterised) and L932F (both on para) were found for the first time in M. persicae, and (3) a linkage was revealed between M918L and S431F. While until recently populations developing on French oilseed rapes were dominated by genotypes possessing pyrethroid target resistance and esterase overproduction, to date a different type of dominating genotype, equipped with carbamate and pyrethroid target resistance, seems to be invading such fields.

High Levels of Resistance to Carbamate and Pyrethroid Chemicals Widespread in Australian <I>Myzus persicae</I> (Hemiptera: Aphididae) Populations

“…MACE-resistant clones that appear to predominate the United Kingdom populations were recently identiÞed to have moderate (R1) esterase resistance (Fenton et al 2010) and a novel mutation (M918L) at the super-kdr locus conferring resistance to synthetic pyrethroids (M. Williamson, personal communication). This M918L mutation has also recently been reported in France (Fontaine et al 2011) and Italy (Dossa et al 2012). Work is currently underway to investigate the presence of this novel mutation in Australia, which may explain the isofemale line genotyping results, and also raises the possibility of a recent incursion of resistant M. persicae biotypes into Australia.…”

Investigating the Molecular Mechanisms of Organophosphate and Pyrethroid Resistance in the Fall Armyworm Spodoptera frugiperda

“…Functional expression studies in oocytes have demonstrated that T929I in combination with L1014F makes insect sodium channels highly insensitive to both type I and type II pyrethroids and also to DDT [27], [28]. To date, the L932F mutation has only been identified in human head lice, where it is frequently associated with the T929I mutation, and the peach potato aphid Myzus persicae where it was associated with L1014F [24], [29]. Heterologous expression of the L932F mutation in oocytes has shown it also reduces channel sensitivity to permethrin [30].…”

Presence and impact of allelic variations of two alternative s‐kdr mutations, M918T and M918L, in the voltage‐gated sodium channel of the green peach aphid Myzus persicae

“…L1014F ( kdr ) and M918T ( s‐kdr ) are the two most common target‐site mutations described in this pest . However, a few other mutations have been reported (F979S and L932F), but their possible involvement in resistance is only partially or not at all characterised . Until now, M918T has always been found in combination with L1014F, leading to high levels of pyrethroid resistance.…”