Environmental Factors Impact and Incidence of Parasitism of Psyllaephagus Bliteus Riek (Hymenoptera Encyrtidae) on Populations of Glycaspis Brimblecombei Moore (Hemiptera Aphalaridae) in Mediterranean Climatic Areas

Caleca, Virgilio; Bella, Salvatore La; Pergola, A.; Lombardo, Alberto; Verde, Gabriella Lo; Maltese, Matteo; Nucifora, Salvatore; Rizzo, Roberto; Suma, Pompeo; Tortorici, Francesco; Rapisarda, Carmelo

doi:10.19263/redia-101.18.12

Cited by 7 publications

(14 citation statements)

References 6 publications

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“…In apparent contrast to what has been reported in the literature [26], our results indicate that air temperature (both mean and accumulated) is the main factor influencing G. brimblecombei population. No significant relation emerges from our analysis between the psyllid development and both precipitation and humidity.…”

Section: Discussioncontrasting

confidence: 99%

“…High summer temperatures, in the absence of rainfall, also have negative effects on the G. brimblecombei population, as noted both in Italy [25] and Portugal [30]. The average maximum temperature is reported as the most significant factor positively influencing G. brimblecombei infestation [26].…”

Section: Discussionmentioning

confidence: 84%

“…Regarding the climatic data, unlike in a previous study [26] that grouped all climatic data referred to the 45 days preceding each sample date, in the present study all the data regarding air temperature, precipitation, and relative humidity during the whole study period were considered and analyzed in their original daily frequency.…”

Section: Data Treatmentmentioning

confidence: 99%

“…In Italy, based on studies carried out in areas where the parasitoid Psyllaephagus bliteus Riek (Hymenoptera Encyrtidae) was absent, it has been suggested how the size of the G. brimblecombei population in a new colonized area is mainly negatively affected by low winter temperatures, but also by high summer temperatures in the absence of rainfall [25]. More recently, research conducted in Sicily on the distribution and activity of both G. brimblecombei and its parasitoid P. bliteus has shown the latter species as the main factor negatively influencing the G. brimblecombei population; further, it showed how RH (namely, the number of daily hours with an RH >80%) and the average daily maximum temperature are important climatic factors affecting the psyllid's development [26].…”

Section: Introductionmentioning

confidence: 99%

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Re-Visiting the Incidence of Environmental Factors on a Pre-Imaginal Population of the Red Gum Lerp Psyllid, Glycaspis brimblecombei Moore

Junk

Eickermann

Milenovic

et al. 2020

Insects

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The red gum lerp psyllid, Glycaspis brimblecombei Moore (Hemiptera: Aphalaridae), is an invasive pest of Eucalyptus trees worldwide, responsible for serious damage, including the death of plants. Knowledge about the incidence of climatic factors on the insect development are essential to define useful strategies for controlling this pest. To this aim, G. brimblecombei has been sampled by two different methods from April 2012 to February 2013 in eastern Sicily on Eucalyptus camaldulensis in nine different sites, where the main climatic data (air temperature, relative humidity, and precipitation) have been also registered. The Glycaspis brimblecombei population showed a similar trend in all nine sites, positively correlated only with air temperature, but a negative correlation has emerged with precipitation and relative humidity. The results show the need for a deeper understanding of the role played by other abiotic (such as different concentrations of CO2) and biotic (e.g., the antagonistic action of natural enemies, competition with other pests, etc.) factors. The greater sensitivity, even at low densities of psyllid, of sampling methods based on the random collection of a fixed number of leaves compared to methods based on the collection of infested leaves in a fixed time interval has been also outlined.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 84%

Section: Data Treatmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Re-Visiting the Incidence of Environmental Factors on a Pre-Imaginal Population of the Red Gum Lerp Psyllid, Glycaspis brimblecombei Moore

Junk

Eickermann

Milenovic

et al. 2020

Insects

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“…Psyllaephagus bliteus controlled about 64% of G. brimblecombei nymphs ( Margiotta et al 2017 ), which is the most important strategy for the biological control of the pest in eucalyptus plantations worldwide. Environmental factors affect the populations and parasitism rates of P. bliteus , with values ranging from 0.21 to 7.03% in Brazil ( Ferreira-Filho et al 2015 ), 1.67 to 30.00% in California ( Daane et al 2012 ), and less than 15.00% in Italy ( Caleca et al 2018 ) and Portugal ( Boavida et al 2016 ). The longevity of adult parasitoids was negatively correlated with the temperature, from 15 to 5 d at field conditions ( Daane et al 2012 ).…”

mentioning

confidence: 99%

Courtship, Mating Behavior, and Ovary Histology of the Nymph Parasitoid Psyllaephagus bliteus (Hymenoptera: Encyrtidae)

Favoreto

Domingues

Serrão

et al. 2021

Journal of Insect Science

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The potential of the parasitoid Psyllaephagus bliteus Riek for the biological control of the eucalyptus pest Glycaspis brimblecombei Moore (Hemiptera: Aphalaridae) nymphs is high. This research sought to analyze the courtship, male competition, and mating behavior of P. bliteus at the proportions of 1:1 and 2:1 males to female in a Petri dish (5 cm diameter), and to describe the ovary histology of virgin and mated females of this parasitoid. At 1:1, males touch the antennae and thorax–abdomen of females during courtship, but females avoid mate attempts before they are 48 h old. At 2:1, the competition between male parasitoids inhibits mating. The histology of ovaries of virgin and mated P. bliteus females is similar, with two well-defined germarium and vitellarium regions, with oocytes at different developmental stages, including mature ones rich in yolk and with eggshell. A clearer understanding of the reproductive behavior and histology of P. bliteus aids in the use of this parasitoid for the biological control of G. brimblecombei.

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Prioritization of invasive alien species with the potential to threaten agriculture and biodiversity in Kenya through horizon scanning

et al. 2022

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Invasive alien species (IAS) rank among the most significant drivers of species extinction and ecosystem degradation resulting in significant impacts on socio-economic development. The recent exponential spread of IAS in most of Africa is attributed to poor border biosecurity due to porous borders that have failed to prevent initial introductions. In addition, countries lack adequate information about potential invasions and have limited capacity to reduce the risk of invasions. Horizon scanning is an approach that prioritises the risks of potential IAS through rapid assessments. A group of 28 subject matter experts used an adapted methodology to assess 1700 potential IAS on a 5-point scale for the likelihood of entry and establishment, potential socio-economic impact, and impact on biodiversity. The individual scores were combined to rank the species according to their overall potential risk for the country. Confidence in individual and overall scores was recorded on a 3-point scale. This resulted in a priority list of 120 potential IAS (70 arthropods, 9 nematodes, 15 bacteria, 19 fungi/chromist, 1 viroid, and 6 viruses). Options for risk mitigation such as full pest risk analysis and detection surveys were suggested for prioritised species while species for which no immediate action was suggested, were added to the plant health risk register and a recommendation was made to regularly monitor the change in risk. By prioritising risks, horizon scanning guides resource allocation to interventions that are most likely to reduce risk and is very useful to National Plant Protection Organisations and other relevant stakeholders.

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Environmental Factors Impact and Incidence of Parasitism of Psyllaephagus Bliteus Riek (Hymenoptera Encyrtidae) on Populations of Glycaspis Brimblecombei Moore (Hemiptera Aphalaridae) in Mediterranean Climatic Areas

Abstract: Environmental factors impact and incidence of parasitism of Psyllaephagus bliteus Riek (Hymenoptera Encyrtidae) on populations of Glycaspis brimblecombei Moore (Hemiptera Aphalaridae) in Mediterranean climatic areas.

Cited by 7 publications

References 6 publications

Re-Visiting the Incidence of Environmental Factors on a Pre-Imaginal Population of the Red Gum Lerp Psyllid, Glycaspis brimblecombei Moore

Re-Visiting the Incidence of Environmental Factors on a Pre-Imaginal Population of the Red Gum Lerp Psyllid, Glycaspis brimblecombei Moore

Courtship, Mating Behavior, and Ovary Histology of the Nymph Parasitoid Psyllaephagus bliteus (Hymenoptera: Encyrtidae)

Prioritization of invasive alien species with the potential to threaten agriculture and biodiversity in Kenya through horizon scanning

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