000 04084nab a22005657a 4500
001 G97672
003 MX-TxCIM
005 20230512175751.0
008 211111s2012 xxu|||p|op||| 00| 0 eng d
022 _a1090-2112 (Online)
022 0 _a1049-9644
024 8 _ahttps://doi.org/10.1016/j.biocontrol.2011.09.010
040 _aMX-TxCIM
041 _aeng
090 _aCIS-7030
100 1 _avon Mérey, G.E.
_924902
245 1 0 _aMinor effects of two elicitors of insect and pathogen resistance on volatile emissions and parasitism of Spodoptera frugiperda in Mexican maize fields
260 _aUSA :
_bElsevier,
_c2012.
500 _aPeer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=1049-9644
500 _aPeer review
520 _aSynthetic elicitors can be used to induce resistance in plants against pathogens and arthropod herbivores. Such compounds may also change the emission of herbivore-induced plant volatiles, which serve as important cues for parasitic wasps to locate their hosts. Therefore, the use of elicitors in the field may affect biological control of insect pests. To test this, we treated maize seedlings growing in a subtropical field in Mexico with methyl jasmonate (MeJA), an elicitor of defense responses against many insects, and benzo-(1,2,3)-thiadiazole-7-carbothioic acid S-methyl ester (BTH), an elicitor of resistance against certain pathogens. Volatile emission, herbivore infestation, pathogen infection, and plant performance (growth and grain yield) of treated and untreated maize plants were measured. Application of BTH slightly reduced volatile emission in maize, while MeJA increased the emission compared to control treatments. Despite the apparent changes in volatile emissions, the elicitor application did not consistently affect infestation by Spodoptera frugiperda larvae, the main insect pest found on the maize seedlings, and had only marginal effects on parasitism rates. Similarly, there were no treatment effects on infestation by other herbivores and pathogens. Results for the six replications that stretched over one summer and one winter season were highly variable, with parasitism rates and the species composition of the parasitoids differing significantly between seasons. This variability, as well as the severe biotic and abiotic stresses on young seedlings might explain why we measured only slight effects of elicitor application on pest incidence and biological control in this specific field study. Indeed, an additional field experiment under milder and more standardized conditions revealed that BTH induced significant resistance against Bipolaris maydis, a major pathogen in the experimental maize fields. Similar affects can be expected for herbivory and parasitism rates.
536 _aGlobal Maize Program
546 _aText in English
591 _aElsevier
594 _aINT2822
595 _aCSC
650 7 _915597
_aMethyl jasmonate
_2AGROVOC
650 7 _91314
_aZea mays
_2AGROVOC
650 7 _96410
_aSpodoptera frugiperda
_2AGROVOC
650 7 _930830
_aCochliobolus heterostrophus
_2AGROVOC
650 7 _930831
_aChelonus
_2AGROVOC
650 7 _930832
_aCampoletis sonorensis
_2AGROVOC
650 7 _930833
_aCotesia marginiventris
_2AGROVOC
650 7 _930834
_aTachinidae
_2AGROVOC
650 7 _918230
_aParasitoids
_2AGROVOC
650 7 _91199
_aPest resistance
_2AGROVOC
650 7 _91077
_aDisease resistance
_2AGROVOC
650 7 _91054
_aConservation
_2AGROVOC
650 0 _94535
_aBiological control
_2AGROVOC
700 1 _aVeyrat, N.
_924899
700 1 _aLange, E. de
_924900
700 1 _aDegen, T.
_924901
700 1 _9861
_aMahuku, G.
_gGlobal Maize Program
_8INT2822
700 1 _aLópez Valdez, R.
_924903
700 1 _aTurlings, T.C.J.
_924904
700 1 _aD'Alessandro, M.
_924905
773 0 _tBiological Control
_gv. 60, no. 1, p. 7-15
_dUSA : Elsevier, 2012.
_x1049-9644
_wG446112
856 4 _uhttps://hdl.handle.net/20.500.12665/852
_yAccess only for CIMMYT Staff
942 _cJA
_2ddc
_n0
999 _c29848
_d29848