The invasive Leptoglossus seed bug, a threat for commercial seed crops, but for conifer diversity?

Lesieur, Vincent; Yart, Annie; Guilbon, Sophie; Lorme, Philippe; Auger‐Rozenberg, Marie‐Anne; Roques, Alain

doi:10.1007/s10530-013-0630-9

Cited by 41 publications

(64 citation statements)

References 27 publications

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“…Two main hypotheses have been postulated to explain such decline: a constraining climate factor not considered in the current formulation of the model; and the effect of a new biotic agent, the exotic seed bug Leptoglossus occidentalis (Heid.) (Bracalini et al, 2013;Lesieur et al, 2014). Seed predation by this insect has been described as a cause of the abortion of unripe conelets, as well as for provoking a significant reduction of the seed yields in mature cones (Mutke et al, 2014;.…”

Section: Introductionmentioning

confidence: 99%

Enhanced tools for predicting annual stone pine (Pinus pinea L.) cone production at tree and forest scale in Inner Spain

Calama

Gordo²,

Madrigal

et al. 2016

For. syst.

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Aim of the study: To present a new spatiotemporal model for Pinus pinea L. annual cone production with validity for Spanish Northen Plateau and Central Range regions. The new model aims to deal with detected deficiencies in previous models: temporal shortage, overestimation of cone production on recent years, incompatibility with data from National Forest Inventory, difficulty for upscaling and ignorance of the inhibitory process due to resource depletion.Area of study: Spanish Northern Plateau and Central Range regions, covering an area where stone pine occupies more than 90,000 ha.Material and methods: Fitting data set include 190 plots and more than 1000 trees were cone production has been annually collected from 1996 to 2014. Models were fitted independently for each region, by means of zero-inflated log normal techniques. Validation of the models was carried out over the annual series of cone production at forest scale.Results: The spatial and temporal factors influencing cone production are similar in both regions, thus the main regional differences in cone yield are related with differences in the phenological timing, the intensity of the influent factors and forest intrinsic conditions. A significant inhibition of floral induction by resource depletion was detected and included into the model. Upscaling the model results in accurate prediction at forest scale.Research highlights:[1] The new model for annual cone production surpass the detected deficiencies of previous models, accurately predicting recent decay in cone production; [2] Regional differences in cone production are due to phenological and seasonal climatic differences rather than to between provenances genetic differences.

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Section: Introductionmentioning

confidence: 99%

Enhanced tools for predicting annual stone pine (Pinus pinea L.) cone production at tree and forest scale in Inner Spain

Calama

Gordo²,

Madrigal

et al. 2016

For. syst.

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“…In Slovakia, it was recorded feeding on 18 conifer species (Barta 2009). Although WCSB populations have invaded most parts of Europe, studies assessing its harmfulness to European forests are limited to that by Lesieur et al (2014) in France. The damage to coniferous seeds did not exceed 25 % (Lesieur et al 2014), but WCSB should be considered at least a potential pest to commercial forestry and natural coniferous stands.…”

Section: Introductionmentioning

confidence: 99%

“…Although WCSB populations have invaded most parts of Europe, studies assessing its harmfulness to European forests are limited to that by Lesieur et al (2014) in France. The damage to coniferous seeds did not exceed 25 % (Lesieur et al 2014), but WCSB should be considered at least a potential pest to commercial forestry and natural coniferous stands. Recently, WCSB was supposed to be responsible for a decrease in quality of stone pine (Pinus pinea L.) seeds that are used for human consumption in Tuscany, Italy (Bracalini et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Biology and temperature requirements of the invasive seed bug Leptoglossus occidentalis (Heteroptera: Coreidae) in Europe

Barta

2015

J Pest Sci

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Leptoglossus occidentalis, a species native to North America, has been expanding through European conifer forests. The fast spread across the European continent demonstrates its great invasive potential and poses a threat to conifer seed orchards. To better understand its potential distribution and population growth in infested regions, the temperature-dependent development in laboratory as well as life history, phenology, and winter survival were investigated in southern Slovakia during 2009-2011. The lower temperature thresholds to complete embryonic and postembryonic development estimated with the linear model were 13.38 and 14.37°C, respectively. The number of degree-days required for completion of development from egg to adult estimated by the linear model was 533°C. Overwintered adults or late nymphal instars became active in mid-March, oviposition was not observed before mid-April, and nymphs passing through five stages reached adulthood after mid-July. Individual females laid on average 31 eggs (max 78). The second generation started in August but did not complete its development till winter, although part of the 5th instar nymphs did survive until spring. Using temperature data of 41 localities across Europe and cumulative degree-days for complete life cycle, a prediction of the potential number of generations per year was made. In conditions of southern Slovakia L. occidentalis was univoltine, but up to four generations per year were estimated depending on the locality in Europe.Keywords Western conifer seed bug Á Life history Á Phenology Á Degree-days Á Mlyňany Arboretum Key message• Leptoglossus occidentalis is a pestiferous invasive insect feeding on conifer seeds which currently spreads over Europe, where detailed information on its biology is limited. • The thermal requirements for the development and life history of L. occidentalis were examined in Slovakia, and the number of potential generations was estimated across Europe. • The outcomes of this study provide important data for evaluating management options of this species.

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“…The range of Leptoglossus gonagra (F.) extends well beyond the Neotropics, to Africa, Asia, and Australia. The North American conifer pest, L. occidentalis Heidemann, recently invaded Europe, Turkey, and East Asia; it represents a potential threat to commercial seed orchards and European alpine forest ecosystems (Lesieur et al 2014 ). In the Neotropics, however, the most damaging species is unquestionably the highly polyphagous L. zonatus (Dallas), distributed from Argentina north to the southern United States.…”

Section: Leptoglossus Guérin-menévillementioning

confidence: 99%

Leaf-Footed Bugs (Coreidae)

Fernandes

Mitchell

Livermore

et al. 2015

Entomology in Focus

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The family Coreidae is distributed worldwide, but these phytophagous bugs are most abundant in the tropics and subtropics. In the Neotropical region, all of the subfamilies and 16 tribes are represented. In tropical ecosystems, these bugs feed on herbs and shrubs in open areas of forests as well as at the forest edge. Some species are spectacularly colored, and unusual expansions of antennae, humeral angles, femora, or tibiae occur in many groups. Some of them move lazily even when disturbed and hardly fl y to escape; others are extremely nimble, fast fl ying away when disturbed. They are frequently encountered in crops, representing important pests in several commodities. No one common name is universally accepted for the family, and none of the frequently used names (e.g., squash bug, leatherbug, leaf-footed bug, Randwanzen) are collectively appropriate for all members of the family.

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The invasive Leptoglossus seed bug, a threat for commercial seed crops, but for conifer diversity?

Cited by 41 publications

References 27 publications

Enhanced tools for predicting annual stone pine (Pinus pinea L.) cone production at tree and forest scale in Inner Spain

Enhanced tools for predicting annual stone pine (Pinus pinea L.) cone production at tree and forest scale in Inner Spain

Biology and temperature requirements of the invasive seed bug Leptoglossus occidentalis (Heteroptera: Coreidae) in Europe

Leaf-Footed Bugs (Coreidae)

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