Attraction behaviors: are synthetic volatiles, typically emitted by insect-damaged Brassica nigra roots, navigation signals for entomopathogenic nematodes (Steinernema and Heterorhabditis)?

Jagodič, Anamarija; Ipavec, Neža; Trdan, S.; Laznik, Žiga

doi:10.1007/s10526-017-9796-x

Cited by 22 publications

(14 citation statements)

References 34 publications

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“…They found that dispersal of male and female IJs is also differentially affected by soil parameters and that this differentiation is species-specific. Other studies revealed that the EPNs respond directionally to insect host exudates (Dillman et al, 2012), plant volatiles (Jagodič et al, 2017), carbon dioxide (Ramos-Rodríguez et al 2007), vibration (Torr et al 2004), and magnetic and electric fields (Ilan et al 2013). Likewise, various biotic and abiotic factors can affect movement behavior (Perony and Townsend, 2013) such as group size (Bonnell et al 2013), environmental spatial structure and resource availability (Reeve and Cronin 2010), avoidance of predators (Beauchamp, 2017) and genetic diversity (Johnson et al 2016).…”

Section: Resultsmentioning

confidence: 99%

Traits of the entomopathogenic nematode, Heterorhabditis bacteriophora (Hb-EG strain), for potential biocontrol in strawberry fields

Shehata

Hammam

El-Borai

et al. 2020

Egypt J Biol Pest Control

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Entomopathogenic nematodes (EPNs) can provide a substantial control, especially of the root feeding larval pests. The objective of the present study was to examine beneficial traits of an indigenous entomopathogenic nematode species, Heterorhabditis bacteriophora Poinar (Hb-EG strain), and to identify superior biocontrol candidates for suppression of the scarab beetle Temnorhynchus baal (Reiche & Saulcy) (Coleoptera: Scarabaeidae: Dynastinae) larvae as serious pests of strawberry in Egypt. The nematodes were applied to infect the greater wax moth, Galleria mellonella L. cadavers, to represent natural emergence from the host in laboratory and under field conditions. Its average yield was 49604 infective juveniles (IJs) per G. mellonella larva. Overall averages of nematode-induced mortality in G. mellonella larvae were (4.63, 3.12, and 1.92) at 4, 8, and 12 weeks, respectively, after continuous weekly baiting with 5 cadavers. Nematode capability for infection and reproduction ranged from 72 to 26% one to five months, respectively, after field inoculation of the infected larvae into the strawberry rhizosphere. The number of IJs, moved to the North of the rhizosphere, was significantly (P ≤ 0.05) less than that moved to the South or the East as reflected by the numbers of infected insects. The factors that may have a marked influence on EPN foraging behavior, persistence, and movement direction with implications for harnessing them as biological pest control agents were discussed.

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Section: Resultsmentioning

confidence: 99%

Traits of the entomopathogenic nematode, Heterorhabditis bacteriophora (Hb-EG strain), for potential biocontrol in strawberry fields

Shehata

Hammam

El-Borai

et al. 2020

Egypt J Biol Pest Control

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“…Dodatne raziskave so naredili tudi slovenski raziskovalci, kjer so preučevali učinke šestih HOS, ki jih izločajo poškodovane korenine črne gorjušice (Brassica nigra L.), zaradi kapusove muhe, na gibanje EO. Ugotovili so, da določeni glukozinolati ter žveplove spojine delujejo repelentno na določene vrste EO (Jagodič et al, 2017). EO so se izkazale, kot učinkoviti biotični agensi pri zatiranju koruznega hrošča (Diabrotica virgifera virgifera, LeConte, 1868), ki spada med pomembnejše škodljivce koruze.…”

Section: Laboratorijske Metode Za Določanje Hosunclassified

“…Na prvi pogled se zdi, da uporaba HOS predstavlja obetavna orodja pri biotičnem varstvu rastlin pred škodljivci (Kaplan, 2012a). Več znanstvenikov je poskušalo spremeniti rastline z gensko transformacijo, da bi le-te povečale svoj potencial za oddajanje HOS (Brillada et al, 2013).…”

Section: Pomisleki Rabe Hos V Kmetijstvuunclassified

“…Kmetijski ekosistemi so veliko bolj zapleteni od laboratorijskih postavitev (Kaplan, 2012a) in za zaščito rastlin pred škodljivci je treba storiti še veliko več raziskav, da bomo lahko v celoti razumeli delovanje tovrstnih sistemov. Katere so najpogostejše težave, s katerimi so se znanstveniki srečevali pri integraciji HOS v kmetijske namene?…”

Section: Pomisleki Rabe Hos V Kmetijstvuunclassified

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Multitrofične interakcije med rastlinami, talnimi škodljivimi žuželkami ter entomopatogenimi ogorčicami / Multitrophic interaction between plants, underground pests and entomopathogenic nematodes

Jagodič

Trdan

Laznik

2019

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IZVLEČEK Multitrofične interakcije med rastlinami, talnimi škodljivimi žuželkami ter entomopatogenimi ogorčicami V kmetijskih ekosistemih lahko talni škodljivci povzročijo veliko gospodarsko škodo. Za njihovo zatiranje se največkrat uporabi kemična fitofarmacevtska sredstva, ki pa imajo lahko tudi negativne vplive na okolje. Raziskovalci zato preučujejo druge možnosti zatiranja tako nadzemskih kot tudi talnih škodljivih organizmov v kmetijstvu. Gibanje organizmov je povezano z zaznavanjem kemičnih dražljajev iz okolja. Študije so v zadnjih letih pokazale, da se proti kemičnim dražljajem lahko gibajo tudi naravni sovražniki škodljivcev (entomopatogene ogorčice). Govorimo o t.i. neposredni obrambi rastlin pred škodljivimi organizmi. Rastlina, ki jo je napadel herbivor, začne v okolico sproščati kemične signale, ki na naravne sovražnike povzročitelja delujejo privabilno. Doslej je bilo identificiranih le nekaj ključnih spojin, ki so odgovorne za posredovanje v tako imenovanih multitrofičnih interakcijah in le nekaj genov ter biokemičnih poti, ki so odgovorne za proizvodnjo hlapljivih organskih snovi (HOS). Mnoge spojine ostajajo še vedno neznane, toda identifikacija le-teh ima velik potencial za uporabo pri varstvu rastlin. Napredki v razumevanju rastlinskih emisij in njihove vloge pri signaliziranju predstavljajo enega izmed novih načinov manipulacije rastlinskih eksudatov, s katerimi bi izboljšali naravne obrambne lastnosti rastlin. Ključne besede: entomopatogene ogorčice, talni škodljivci, HOS, neposredna rastlinska obramba ABSTRACT Multitrophic interaction between plants, underground pests and entomopathogenic nematodes In agricultural ecosystems, soil pests can cause great economic damage. Pesticides are often used for their control, but they may also have negative effects on the environment. Researchers are therefore exploring other options for suppressing both above-ground and soil-dwelling organisms in agriculture. The movement of organisms is associated with the detection of chemical stimuli from the environment. Studies have shown in recent years that natural enemies (entomopathogenic nematodes) of pests can also move against chemical stimuli. The term is known as an indirect plant defense. The plant that has been attacked by the herbivor starts to release chemical signals to the environment, which act on the natural enemies of the pests. To date, only a few key compounds have been identified that are responsible for mediation in so-called multitrophic interactions and only a few genes and biochemical pathways that are responsible for the production of volatile organic compounds (VOCs). Many compounds remain unknown, but their identification has great potential for use in plant protection. Progress in understanding plant emissions and their role in signaling is one of the new ways to manipulate plant exudates to improve the natural defenses of plants.

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“…Terrestrial communities based on plants are composed of at least three trophic levels, including host plants, herbivores, and their natural enemies. Plants can have important impact not only on herbivores (Jagodi c et al, 2017), but also on their natural enemies, directly or indirectly (Price et al, 1980). In such tritrophic systems, the impact of the prey species on its predator is affected not only by the species of host plant (R€ u & Mitsipa, 2000;Francis et al, 2001;Al-Zyoud et al, 2005), but also by the cultivar (Du et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Bottom‐up effect of host plants on life‐history characteristics of Aphidoletes aphidimyza feeding on Aphis gossypii

Madahi

Sahragard

Hosseini

et al. 2019

Entomologia Exp Applicata

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The predatory midge Aphidoletes aphidimyza (Rondani) (Diptera: Cecidomyiidae) is widely used for the control of Aphis spp. in many agricultural systems. We aimed to determine the most suitable host plant for rearing the predatory midges on the prey Aphis gossypii Glover (Hemiptera: Aphididae). Six host plants were selected: cucumber (Cucumis sativus L. cv. Beith Alpha), tomato (Solanum lycopersicum L. cv. Falat111), eggplant (Solanum melongena L. cv. Yummy), pepper (Capsicum annuum L. cv. Bertene) (all Solanaceae), okra [Abelmoschus esculentus (L.) Moensch cv. Clemson Spineless] (Malvaceae), and squash (Cucurbita pepo L. cv. Hybrid rajai) (Cucurbitaceae). Some physical traits (length and density of trichomes) and chemical attributes (nitrogen content) of prey host plants were investigated. The results showed that prey host plants differed significantly in their effect on fitness of the predator. The shortest immature development time (18.07 ± 0.257 days), the longest female adult longevity (7.5 ± 0.18 days), and the highest fecundity (89 eggs/female) of A. aphidimyza were found with squash as prey food. The highest intrinsic rate of increase (0.171 ± 0.009 day−1) and also the shortest mean generation time (22.4 ± 0.32 days) were also obtained when A. aphidimyza fed on A. gossypii reared on squash. Canonical correlation analysis (CCA) approved the correlation between life‐history traits of A. aphidimyza and characteristics of prey host plants. The suitability of squash for rearing A. aphidimyza can be attributed to the higher nitrogen content, longer trichomes, and relatively high density of trichomes, which provided a better environment for A. gossypii and indirectly favored A. aphidimyza. This study showed that squash is the most suitable host plant for rearing A. aphidimyza feeding on A. gossypii.

show abstract

Attraction behaviors: are synthetic volatiles, typically emitted by insect-damaged Brassica nigra roots, navigation signals for entomopathogenic nematodes (Steinernema and Heterorhabditis)?

Cited by 22 publications

References 34 publications

Traits of the entomopathogenic nematode, Heterorhabditis bacteriophora (Hb-EG strain), for potential biocontrol in strawberry fields

Traits of the entomopathogenic nematode, Heterorhabditis bacteriophora (Hb-EG strain), for potential biocontrol in strawberry fields

Multitrofične interakcije med rastlinami, talnimi škodljivimi žuželkami ter entomopatogenimi ogorčicami / Multitrophic interaction between plants, underground pests and entomopathogenic nematodes

Bottom‐up effect of host plants on life‐history characteristics of Aphidoletes aphidimyza feeding on Aphis gossypii

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