Emilio Guerrieri - Academia.edu (original) (raw)

Uploads

Papers by Emilio Guerrieri

Research paper thumbnail of The effect of rearing history and aphid density on volatile-mediated foraging behaviour of <i>Diaeretiella rapae</i>

Ecological Entomology, Nov 28, 2018

Research paper thumbnail of Parasitoids (Hymenoptera) of leaf-spinning moths (Lepidoptera) feeding on <i>Vaccinium uliginosum</i> L. along an ecological gradient in central European peat bogs

Entomologica Fennica, Aug 15, 2019

Research paper thumbnail of Electrophysiological and behavioural response of Philaenus spumarius to essential oils and aromatic plants

Scientific Reports, Feb 20, 2020

Research paper thumbnail of Correction: Phytophagy of Nesidiocoris tenuis triggers the response of Trichogramma achaeae to tomato plants infested by Tuta absoluta

Research paper thumbnail of Small volatile lipophilic molecules induced belowground by aphid attack elicit a defensive response in neighbouring un-infested plants

Frontiers in Plant Science

In pioneering studies on plant-aphid interactions, we have observed that Vicia faba plants infest... more In pioneering studies on plant-aphid interactions, we have observed that Vicia faba plants infested by aphids can transmit signals via the rhizosphere that induce aboveground defence in intact, neighbouring plants. The aphid parasitoid Aphidius ervi is significantly attracted towards intact broad bean plants grown in a hydroponic solution previously harbouring Acyrtosiphon pisum-infested plants. To identify the rhizosphere signal(s) possibly mediating this belowground plant-plant communication, root exudates were collected using Solid-Phase Extraction (SPE) from 10-day old A. pisum-infested and un-infested Vicia faba plants hydroponically grown. To verify the ability of these root exudates to trigger defence mechanisms against the aphids we added them to V. fabae plants grown in hydroponic solution, and tested these plants in the wind-tunnel bioassay to assess their attractiveness towards the aphids’ parasitoids A. ervi. We identified three small volatile lipophilic molecules as pla...

Research paper thumbnail of Genomic and metabolic profiling of two tomato contrasting cultivars for tolerance to Tuta absoluta

Planta

Main conclusion Dissimilar patterns of variants affecting genes involved in response to herbivory... more Main conclusion Dissimilar patterns of variants affecting genes involved in response to herbivory, including those leading to difference in VOC production, were identified in tomato lines with contrasting response to Tuta absoluta. Abstract Tuta absoluta is one of the most destructive insect pest affecting tomato production, causing important yield losses both in open field and greenhouse. The selection of tolerant varieties to T. absoluta is one of the sustainable approaches to control this invasive leafminer. In this study, the genomic diversity of two tomato varieties, one tolerant and the other susceptible to T. absoluta infestation was explored, allowing us to identify chromosome regions with highly dissimilar pattern. Genes affected by potential functional variants were involved in several processes, including response to herbivory and secondary metabolism. A metabolic analysis for volatile organic compounds (VOCs) was also performed, highlighting a difference in several class...

Research paper thumbnail of Combination of the Systemin peptide with the beneficial fungus Trichoderma afroharzianum T22 improves plant defense responses against pests and diseases

Trichoderma spp. are among the most widely used plant beneficial fungi in agriculture. A novel ap... more Trichoderma spp. are among the most widely used plant beneficial fungi in agriculture. A novel approach to enhance their effectiveness in plant defense is to use the fungi in combination with bioactive molecules including plant-derived compounds. Here, we show that plant treatment with Trichoderma afroharzianum (strain T22) and Systemin (Sys), a tomato plant peptide active in triggering plant defense, confers protection against the fungal pathogens Fusarium oxysporum, Botrytis cinerea and the insect pest Tuta absoluta. The observed defensive response was associated with increased accumulation of metabolites and transcripts involved in the Jasmonic acid (JA) pathway. Our findings suggest that the innovative combination of T. afroharzianum T22 and Sys can result in a more effective and robust control of different biotic stress agents.

Research paper thumbnail of Utilizzo di funghi benefici nel controllo degli insetti dannosi

Research paper thumbnail of Unintended effects of a Phytophtora-resistant cisgenic potato clone on the potato aphid Macrosiphum euphorbiae and its parasitoid Aphidius ervi

Journal of Pest Science, 2017

Research paper thumbnail of Parasitoids (Hymenoptera) of leaf-spinning moths (Lepidoptera) feeding on Vaccinium uliginosum L. along an ecological gradient in central European peat bogs

Entomologica Fennica, 2019

Parasitoids of leaf-spinning Lepidoptera associated with two isolated central European peat bogs ... more Parasitoids of leaf-spinning Lepidoptera associated with two isolated central European peat bogs were investigated. Five families of parasitoid Hymenoptera (Braconidae, lchneumonidae, Eulophidae, Pteromalidae and Encyrtidae) were recorded. Three categories were recognised: (1) primary parasitoids, (2) facultative hyperparasitoids and (3) obligatory hyperparasitoids. Ten species of Braconidae, five species and seven marked morphospecies among lchneumonidae, and three species of Chalcidoidea were identified. Despite of some niche-specific (but less host-specific) parasitoids, all these hymenopterans are likely to be generalists and none of them were confirmed to be habitat and/or host specialists. Unlike their eurytopic (opportunistic tyrphoneutral) parasitoids, the Lepidoptera hosts associated with peat bogs are partially highly stenotopic (tyrphobionts and tyrphophiles). The occurrence of parasitoids compared to their potential hosts was structured along an ecological (mesoclimatic)...

Research paper thumbnail of The spread of the non-native pine tortoise scale Toumeyella parvicornis (Hemiptera: Coccidae) in Europe: a major threat to Pinus pinea in Southern Italy

iForest - Biogeosciences and Forestry, 2018

Research paper thumbnail of Trichoderma atroviride P1 Colonization of Tomato Plants Enhances Both Direct and Indirect Defense Barriers Against Insects

Frontiers in Physiology, 2019

Research paper thumbnail of Effects of single or combined water deficit and aphid attack on tomato volatile organic compound (VOC) emission and plant-plant communication

Environmental and Experimental Botany, 2018

Research paper thumbnail of Graphosoma lineatum (Hemiptera: Pentatomidae): a suitable host for mass rearing Ooencyrtus telenomicida (Hymenoptera: Encyrtidae)

International Journal of Pest Management, 2017

ABSTRACT The species Ooencyrtus telenomicida (Vassiliev) (Hymenoptera: Encyrtidae) is currently b... more ABSTRACT The species Ooencyrtus telenomicida (Vassiliev) (Hymenoptera: Encyrtidae) is currently being considered as a candidate for augmentative biological control agent (BCA) against several pests, including Halyomorpha halys (Stål) (Heteroptera: Pentatomidae). Protocols for mass production of a BCA need fundamental information on its biological attributes. Here we tested a possible laboratory host for the rearing of O. telenomicida: the common bug Graphosoma lineatum L. (Heteroptera: Pentatomidae). At tested conditions, O. telenomicida biological parameters were: rm 0.154, offspring production 84.07 specimens/female, sex ratio (% females) 71%, juvenile development time about 16 days, population doubling time 4.52 days, emergence rate about 90%.

Research paper thumbnail of Anagyrus Howard (Hymenoptera: Encyrtidae) parasitoids of the invasive Delottococcus aberiae (De Lotto) (Hemiptera: Pseudococcidae) from South Africa, with description of two new species

Zootaxa, 2018

Delottococcus aberiae is an invasive mealybug native to South Africa that has been accidentally i... more Delottococcus aberiae is an invasive mealybug native to South Africa that has been accidentally introduced into Spain. A survey of natural enemies in its native area to potentially be used for biological control of this pest resulted in a number of species, among which four belonged to the genus Anagyrus. Following an integrative approach using morphological and molecular data, two species new to science are here described and compared with closely related ones: Anagyrus aberiae sp.n. and Anagyrus antoniae sp.n. A dichotomous key to separate the species of Anagyrus attacking D. aberiae in South Africa is provided. [Zoobank LSID: Anagyrus aberiae Guerrieri sp. nov. (Fig. 1–7): LSID urn:lsid:zoobank.org:pub:8CF8983B-93DC-4ECF-A8FB-CF76E94319B3 Anagyrus antoniae Guerrieri sp. nov. (Fig. 8–12): LSID urn:lsid:zoobank.org:pub:8CF8983B-93DC-4ECF-A8FB-CF76E94319B3]

Research paper thumbnail of Prospects for plant defence activators and biocontrol in IPM – Concepts and lessons learnt so far

Research paper thumbnail of Rapid on-site identification of the biocontrol agent of the Asian chestnut gall wasp

Biocontrol Science and Technology, 2016

Research paper thumbnail of Insights On the Impact of Arbuscular Mycorrhizal Symbiosis On Tomato Tolerance to Water Stress

Research paper thumbnail of Volatile-mediated foraging behaviour of three parasitoid species under conditions of dual insect herbivore attack

Animal Behaviour, 2016

Infochemicals play an important role in structuring intra- and interspecific interactions. Many p... more Infochemicals play an important role in structuring intra- and interspecific interactions. Many parasitoid wasp species rely on herbivory or oviposition-induced plant volatiles (HIPVs/OIPVs) to locate their herbivorous hosts, and must cope with variation in the volatile blends due to factors such as plant/host species, herbivore density or attack by several herbivores. However, little is known about how dual herbivory or changes in herbivore density affect multiple parasitoid species, each attacking a different herbivore, in the same system. In a natural system, we investigated the effect of dual attack on the ability of three parasitoid species to differentiate between volatiles induced by hosts and those induced by a combination of hosts and nonhosts. Black mustard, Brassica nigra, plants were infested with eggs or caterpillars of Pieris brassicae, alone or in combination with different densities of Brevicoryne brassicae aphids. We determined the ability of three different parasitoid species that parasitize either P. brassicae eggs (Trichogramma brassicae), caterpillars (Cotesia glomerata) or B. brassicae aphids (Diaeretiella rapae) to discriminate between the induced volatiles, and analysed the plant volatile blends. Dual infestation did not affect the parasitoid species equally and aphid infestation altered, in a density-dependent manner, the volatile-mediated foraging of all three parasitoid species. Chemical analyses of the volatile blends revealed nonlinear emission patterns in relation to aphid density in both plants attacked by aphids alone and in plants attacked by a combination of aphids and caterpillars. Simple correlations between behaviour and volatile emissions in pairwise comparisons suggest the importance of certain volatiles explaining attraction, whereas dose-response type analyses reveal that these simple correlation analyses provide an incomplete picture.

Research paper thumbnail of Pest control service provided by bats in Mediterranean rice paddies: linking agroecosystems structure to ecological functions

Research paper thumbnail of The effect of rearing history and aphid density on volatile-mediated foraging behaviour of <i>Diaeretiella rapae</i>

Ecological Entomology, Nov 28, 2018

Research paper thumbnail of Parasitoids (Hymenoptera) of leaf-spinning moths (Lepidoptera) feeding on <i>Vaccinium uliginosum</i> L. along an ecological gradient in central European peat bogs

Entomologica Fennica, Aug 15, 2019

Research paper thumbnail of Electrophysiological and behavioural response of Philaenus spumarius to essential oils and aromatic plants

Scientific Reports, Feb 20, 2020

Research paper thumbnail of Correction: Phytophagy of Nesidiocoris tenuis triggers the response of Trichogramma achaeae to tomato plants infested by Tuta absoluta

Research paper thumbnail of Small volatile lipophilic molecules induced belowground by aphid attack elicit a defensive response in neighbouring un-infested plants

Frontiers in Plant Science

In pioneering studies on plant-aphid interactions, we have observed that Vicia faba plants infest... more In pioneering studies on plant-aphid interactions, we have observed that Vicia faba plants infested by aphids can transmit signals via the rhizosphere that induce aboveground defence in intact, neighbouring plants. The aphid parasitoid Aphidius ervi is significantly attracted towards intact broad bean plants grown in a hydroponic solution previously harbouring Acyrtosiphon pisum-infested plants. To identify the rhizosphere signal(s) possibly mediating this belowground plant-plant communication, root exudates were collected using Solid-Phase Extraction (SPE) from 10-day old A. pisum-infested and un-infested Vicia faba plants hydroponically grown. To verify the ability of these root exudates to trigger defence mechanisms against the aphids we added them to V. fabae plants grown in hydroponic solution, and tested these plants in the wind-tunnel bioassay to assess their attractiveness towards the aphids’ parasitoids A. ervi. We identified three small volatile lipophilic molecules as pla...

Research paper thumbnail of Genomic and metabolic profiling of two tomato contrasting cultivars for tolerance to Tuta absoluta

Planta

Main conclusion Dissimilar patterns of variants affecting genes involved in response to herbivory... more Main conclusion Dissimilar patterns of variants affecting genes involved in response to herbivory, including those leading to difference in VOC production, were identified in tomato lines with contrasting response to Tuta absoluta. Abstract Tuta absoluta is one of the most destructive insect pest affecting tomato production, causing important yield losses both in open field and greenhouse. The selection of tolerant varieties to T. absoluta is one of the sustainable approaches to control this invasive leafminer. In this study, the genomic diversity of two tomato varieties, one tolerant and the other susceptible to T. absoluta infestation was explored, allowing us to identify chromosome regions with highly dissimilar pattern. Genes affected by potential functional variants were involved in several processes, including response to herbivory and secondary metabolism. A metabolic analysis for volatile organic compounds (VOCs) was also performed, highlighting a difference in several class...

Research paper thumbnail of Combination of the Systemin peptide with the beneficial fungus Trichoderma afroharzianum T22 improves plant defense responses against pests and diseases

Trichoderma spp. are among the most widely used plant beneficial fungi in agriculture. A novel ap... more Trichoderma spp. are among the most widely used plant beneficial fungi in agriculture. A novel approach to enhance their effectiveness in plant defense is to use the fungi in combination with bioactive molecules including plant-derived compounds. Here, we show that plant treatment with Trichoderma afroharzianum (strain T22) and Systemin (Sys), a tomato plant peptide active in triggering plant defense, confers protection against the fungal pathogens Fusarium oxysporum, Botrytis cinerea and the insect pest Tuta absoluta. The observed defensive response was associated with increased accumulation of metabolites and transcripts involved in the Jasmonic acid (JA) pathway. Our findings suggest that the innovative combination of T. afroharzianum T22 and Sys can result in a more effective and robust control of different biotic stress agents.

Research paper thumbnail of Utilizzo di funghi benefici nel controllo degli insetti dannosi

Research paper thumbnail of Unintended effects of a Phytophtora-resistant cisgenic potato clone on the potato aphid Macrosiphum euphorbiae and its parasitoid Aphidius ervi

Journal of Pest Science, 2017

Research paper thumbnail of Parasitoids (Hymenoptera) of leaf-spinning moths (Lepidoptera) feeding on Vaccinium uliginosum L. along an ecological gradient in central European peat bogs

Entomologica Fennica, 2019

Parasitoids of leaf-spinning Lepidoptera associated with two isolated central European peat bogs ... more Parasitoids of leaf-spinning Lepidoptera associated with two isolated central European peat bogs were investigated. Five families of parasitoid Hymenoptera (Braconidae, lchneumonidae, Eulophidae, Pteromalidae and Encyrtidae) were recorded. Three categories were recognised: (1) primary parasitoids, (2) facultative hyperparasitoids and (3) obligatory hyperparasitoids. Ten species of Braconidae, five species and seven marked morphospecies among lchneumonidae, and three species of Chalcidoidea were identified. Despite of some niche-specific (but less host-specific) parasitoids, all these hymenopterans are likely to be generalists and none of them were confirmed to be habitat and/or host specialists. Unlike their eurytopic (opportunistic tyrphoneutral) parasitoids, the Lepidoptera hosts associated with peat bogs are partially highly stenotopic (tyrphobionts and tyrphophiles). The occurrence of parasitoids compared to their potential hosts was structured along an ecological (mesoclimatic)...

Research paper thumbnail of The spread of the non-native pine tortoise scale Toumeyella parvicornis (Hemiptera: Coccidae) in Europe: a major threat to Pinus pinea in Southern Italy

iForest - Biogeosciences and Forestry, 2018

Research paper thumbnail of Trichoderma atroviride P1 Colonization of Tomato Plants Enhances Both Direct and Indirect Defense Barriers Against Insects

Frontiers in Physiology, 2019

Research paper thumbnail of Effects of single or combined water deficit and aphid attack on tomato volatile organic compound (VOC) emission and plant-plant communication

Environmental and Experimental Botany, 2018

Research paper thumbnail of Graphosoma lineatum (Hemiptera: Pentatomidae): a suitable host for mass rearing Ooencyrtus telenomicida (Hymenoptera: Encyrtidae)

International Journal of Pest Management, 2017

ABSTRACT The species Ooencyrtus telenomicida (Vassiliev) (Hymenoptera: Encyrtidae) is currently b... more ABSTRACT The species Ooencyrtus telenomicida (Vassiliev) (Hymenoptera: Encyrtidae) is currently being considered as a candidate for augmentative biological control agent (BCA) against several pests, including Halyomorpha halys (Stål) (Heteroptera: Pentatomidae). Protocols for mass production of a BCA need fundamental information on its biological attributes. Here we tested a possible laboratory host for the rearing of O. telenomicida: the common bug Graphosoma lineatum L. (Heteroptera: Pentatomidae). At tested conditions, O. telenomicida biological parameters were: rm 0.154, offspring production 84.07 specimens/female, sex ratio (% females) 71%, juvenile development time about 16 days, population doubling time 4.52 days, emergence rate about 90%.

Research paper thumbnail of Anagyrus Howard (Hymenoptera: Encyrtidae) parasitoids of the invasive Delottococcus aberiae (De Lotto) (Hemiptera: Pseudococcidae) from South Africa, with description of two new species

Zootaxa, 2018

Delottococcus aberiae is an invasive mealybug native to South Africa that has been accidentally i... more Delottococcus aberiae is an invasive mealybug native to South Africa that has been accidentally introduced into Spain. A survey of natural enemies in its native area to potentially be used for biological control of this pest resulted in a number of species, among which four belonged to the genus Anagyrus. Following an integrative approach using morphological and molecular data, two species new to science are here described and compared with closely related ones: Anagyrus aberiae sp.n. and Anagyrus antoniae sp.n. A dichotomous key to separate the species of Anagyrus attacking D. aberiae in South Africa is provided. [Zoobank LSID: Anagyrus aberiae Guerrieri sp. nov. (Fig. 1–7): LSID urn:lsid:zoobank.org:pub:8CF8983B-93DC-4ECF-A8FB-CF76E94319B3 Anagyrus antoniae Guerrieri sp. nov. (Fig. 8–12): LSID urn:lsid:zoobank.org:pub:8CF8983B-93DC-4ECF-A8FB-CF76E94319B3]

Research paper thumbnail of Prospects for plant defence activators and biocontrol in IPM – Concepts and lessons learnt so far

Research paper thumbnail of Rapid on-site identification of the biocontrol agent of the Asian chestnut gall wasp

Biocontrol Science and Technology, 2016

Research paper thumbnail of Insights On the Impact of Arbuscular Mycorrhizal Symbiosis On Tomato Tolerance to Water Stress

Research paper thumbnail of Volatile-mediated foraging behaviour of three parasitoid species under conditions of dual insect herbivore attack

Animal Behaviour, 2016

Infochemicals play an important role in structuring intra- and interspecific interactions. Many p... more Infochemicals play an important role in structuring intra- and interspecific interactions. Many parasitoid wasp species rely on herbivory or oviposition-induced plant volatiles (HIPVs/OIPVs) to locate their herbivorous hosts, and must cope with variation in the volatile blends due to factors such as plant/host species, herbivore density or attack by several herbivores. However, little is known about how dual herbivory or changes in herbivore density affect multiple parasitoid species, each attacking a different herbivore, in the same system. In a natural system, we investigated the effect of dual attack on the ability of three parasitoid species to differentiate between volatiles induced by hosts and those induced by a combination of hosts and nonhosts. Black mustard, Brassica nigra, plants were infested with eggs or caterpillars of Pieris brassicae, alone or in combination with different densities of Brevicoryne brassicae aphids. We determined the ability of three different parasitoid species that parasitize either P. brassicae eggs (Trichogramma brassicae), caterpillars (Cotesia glomerata) or B. brassicae aphids (Diaeretiella rapae) to discriminate between the induced volatiles, and analysed the plant volatile blends. Dual infestation did not affect the parasitoid species equally and aphid infestation altered, in a density-dependent manner, the volatile-mediated foraging of all three parasitoid species. Chemical analyses of the volatile blends revealed nonlinear emission patterns in relation to aphid density in both plants attacked by aphids alone and in plants attacked by a combination of aphids and caterpillars. Simple correlations between behaviour and volatile emissions in pairwise comparisons suggest the importance of certain volatiles explaining attraction, whereas dose-response type analyses reveal that these simple correlation analyses provide an incomplete picture.

Research paper thumbnail of Pest control service provided by bats in Mediterranean rice paddies: linking agroecosystems structure to ecological functions