Myzus persicae

There are marked species differences in A-esterase activity. Birds have very low, often undetectable, levels of activity in plasma toward paraoxon, diazoxon, pirimi-phos-methyl oxon, and chlorpyrifos oxon (Brealey et al. 1980, Mackness et al. 1987, Walker et al. 1991 Figure 2.10). Mammals have much higher plasma A-esterase activities to all of these substrates. The toxicological implications of this are discussed in Chapter 10. Some species of insects have no measurable A-esterase activity, even in strains that have resistance to OPs (Mackness et al. 1982, Walker 1994). These include the peach potato aphid (Myzus persicae Devonshire 1991) and the... [Pg.37]

Dimethoate (OP) Topical LD50 Myzus persicae R clone Myzus persicae S clone 500... [Pg.61]

OPs Myzus persicae Resistant clones (85-315) Enhanced B esterase Multiple copies of gene... [Pg.94]

L. M. Field, A. L. Devonshire, B. G. Forde, Molecular Evidence that Insecticide Resistance in Peach-Potato Aphids (Myzus persicae Sulz.) Results from Amplification of an Esterase Gene , Biochem. J. 1988, 257, 309-312. [Pg.63]

Cuticular diterpenes-duvanes and labdanes. Cutler have found that the cuticular diterpenes of green tobacco have both allelopathic and insect-deterrent effects (38). Present in the cuticle are duvane and/or labdane diterpenes (Figure 3) The levels of these specific cuticular components are believed to be responsible for the observed resistance of some types of tobacco to green peach aphids Myzus persicae (Sulzer), tobacco budworm Heliothis virescens (F.), and tobacco hornworm Manduca sexta (L.) (39). [Pg.535]

Stems and leaves C-glycosyl-flavones and Myzus persicae ... [Pg.424]

Dreyer, D.L. and Jones, K.C., Feeding deterency of flavonoids and related phenolics towards Schizaphis graminum and Myzus persicae aphid feeding deterrents in wheat. Phytochemistry, 20, 2489, 1981. [Pg.441]

The effect of plant age on the host selection process has been observed by comparison of two aphid species on brasslca plants (56). A specialist, Brevicoryne brassicae prefers young leaves, which are higher in glucoslnolates, whereas the generalist, Myzus persicae prefers older leaves, where amino acids are more Important in the selection process. [Pg.206]

KoHneHTpa-I(HH, % CMepTHOCTb Myzus persicae Ha KapTtxJieJie CMepTHOCTb Myzus persicae Ha Kanycre, % ... [Pg.217]

Sample Number Emulsion Concentration Myzus Persicae Tetranychus Urticae Agrotis Ipsilon... [Pg.344]

Chang, T., Chen, L., Chen, S., Cai, H., Liu, X., Xiao, G., and Zhu, Z., Transformation of tobacco with genes encoding Helianthus tuberosus Agglutinin (HTA) confers resistance to peach-potato aphid (Myzus persicae), Transgenic Res., 12, 607-614, 2003. [Pg.239]

We have recently reported the first purification of an insect myrosinase and its partial characterization from the cabbage aphid (Brevicoryne brassicae).9 Of all aphids examined for myrosinase,10 only the crucifer specialists, B. brassicae and Lipaphis erysimi, possessed activity although some other polyphagous aphids such as Myzus persicae can also feed on crucifers. [Pg.129]

WEBER, G., OSWALD, S., ZILLNER, U., Suitability of rape cultivars with different levels of glucosinolate content for Brevicoryne brassicae and Myzus persicae, Z.Pflanzenkr. Pflanzenschultz,1986, 93,113-124. [Pg.142]

FRANCIS, F., LOGNAY, G WATHELET, J-P., HAUBRUGE, E., Effects of allelochemicals from first (Brassicaceae) and second (Myzus persicae and Brevicoryne brassicae) trophic levels on Adalia bipunctulata, J.Chem. Ecol., 2001, 27, 243-256. [Pg.142]

Devonshire, A.L. and Sawicki, R.M., Insecticide-resistant Myzus persicae as an example of evolution by gene duplication, Nature, 280,140,1979. [Pg.226]

Devonshire, A.L., Moores, G.D., and ffrench-Constant, R.H., Detection of insecticide resistance by immunological estimation of carboxylesterase activity in Myzus persicae (Sulzer) and cross reaction of the antiserum with Phorodon humuli (Schrank) (Hemiptera Aphididae), Bull. Ento-mol. Res., 76, 97,1986. [Pg.226]

Field, L.M. and Devonshire, A.L., Evidence that the E4 and FE4 esterase genes responsible for insecticide resistance in the aphid Myzus persicae (Sulzer) are part of a gene family, Biochem. j., 330, 169,1998. [Pg.226]

Sawicki, R.M., Devonshire, A.L., Rice, A.D., Moores, G.D., Petzing, S.M., and Cameron, A., The detection and distribution of orga nophosphorus and carbamate insecticide-resistant Myzus persicae (Sulz.) in Britain in 1976, Pestic. Sci., 9,189,1978. [Pg.229]

Myzus persicae dietary requirement, D-isoascorbic acid fully active 67... [Pg.286]

Plutella xylostella) (Bemisia tabaci) (Myzus persicae) (Liriomyza trifolii) (Heliothis virescens) (H. armigera)... [Pg.21]

Figure 9.2 Devonshire and Sawicki (1979) at Rothamstead Experimental Station, Hertfordshire, U.K., found seven variants of the aphid Myzus persicae with different resistances to parathion. Excess production of a carboxylesterase as a result of one or several gene duplications was found to be the resistance mechanism. High levels of carboxylesterases take paraoxon away from acetylcholinesterase so that aphids become resistant.

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