scholarly journals Parasitoid complex of Stereonychus fraxini (De Geer) (Coleoptera, Curculionidae) in Serbia

2013 ◽  
Vol 65 (2) ◽  
pp. 733-737
Author(s):  
M. Drekic ◽  
Lj. Mihajlovic ◽  
A. Lozan
Keyword(s):  
Parasitoid Complex ◽  
Hymenopteran Parasitoids

The parasitoid complex of the ash weevil Stereonychus fraxini (De Geer) (Coleoptera, Curculionidae) from 20 localities in Serbia was studied. Forty-one samples of ash weevil larvae and cocoons were analyzed, and the presence of parasitoids was confirmed in 24 samples. Ten species of hymenopteran parasitoids (Hymenoptera Parasitica) were recorded. The two common eulophid wasps, Entedon zanara Walker and Entedon cionobius Thompson, were the most abundant. Parasitoids had an insignificant influence on the level of ash weevil population, because the level of infestation did not exceed 20% in 83% of the samples; however infestation above 40% was determined in 12.2% of the samples, indicating that in some cases parasitoids may significantly reduce the ash weevil population.

scholarly journals Microgastrinae (Hymenoptera: Braconidae) parasitizing Epirrita autumnata (Lepidoptera: Geometridae) larvae in Fennoscandia with description of Cotesia autumnatae Shaw, sp. n.

2013 ◽  
Vol 24 (2) ◽  
pp. 65-80 ◽  
Author(s):  
Kai Ruohomäki ◽  
Tero Klemola ◽  
Mark Shaw ◽  
Niina Snäll ◽  
Ilari Sääksjärvi ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Identification Key ◽  
The Other ◽  
Epirrita Autumnata ◽  
Parasitoid Complex ◽  
Hymenopteran Parasitoids

The microgastrine subset of hymenopteran parasitoids of the geometrid Epirrita autumnata is investigated in Fennoscandia. Ecology, including population dynamics, of the moth has been intensively studied in northern and mountainous Finland, Norway and Sweden. Recently supported hypotheses about the causes of its cyclic population dynamics stress the role of parasitoids, while the parasitoid complex with some 15 species is insufficiently known. The complex includes four solitarymicrogastrine species, Protapanteles anchisiades (Nixon), P. immunis (Wesmael), Cotesia salebrosa (Marshall) and C. autumnatae Shaw, sp. n. Here, we provide detailed figures for the latter, which is morphologically close to C. jucunda (Marshall), and describe the species as new to science. We also providemore general habitus figures of the other three species, as well as an identification key for the four species, aiming to aid recognition of these species by ecologists dealing with microgastrine parasitoids of E. autumnata and their alternative geometrid hosts.

scholarly journals Parasitoid complex of Zygaena filipendulae L. (Lepidoptera: Zygaenidae)

2013 ◽  
Vol 65 (3) ◽  
pp. 1027-1035 ◽  
Author(s):  
V. Zikic ◽  
S.S. Stankovic ◽  
A. Petrovic ◽  
Marijana Ilic-Milosevic ◽  
Van Achterberg
Keyword(s):  
Lotus Corniculatus ◽  
Parasitoid Wasps ◽  
Parasitoid Complex ◽  
Short Period ◽  
The Family ◽  
Hymenopteran Parasitoids

Caterpillars of Zygaena filipendulae Linnaeus were sampled during May and June in the Sicevo Gorge in southern Serbia. All parasitized larvae were found on grey elm trees (Ulmus canescens). During the short period before metamorphosis of Z. filipendulae, we found the whole specter of parasitoid wasps: Cotesia zygaenarum Marshall (Braconidae), Gelis agilis (Fabricius) and Mesochorus velox Holmgren (Ichneumonidae), Elasmus platyedrae Ferri?re and Pediobius sp. (Eulophidae), Eupelmus vesicularis (Retzius) (Eupelmidae) and Brachymeria tibialis (Walker) (Chalcididae). Beside hymenopteran parasitoids, we found parasitoid flies from the family Tachinidae, Phryxe nemea (Meigen) (Diptera). All 46 observed Z. filipendulae larvae found on grey elm trees were parasitized, but three pupae were found directly on Lotus corniculatus. Two species are newly reported as parasitoids of Z. filipendulae: E. platyedrae and Eupelmus vesicularis and three species (G. agilis, M. velox and E. platyedrae) are new to the fauna of Serbia.

scholarly journals Hymenopteran Parasitoids of Aphid Pests within Australian Grain Production Landscapes

Insects ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 44
Author(s):  
Samantha E. Ward ◽  
Paul A. Umina ◽  
Sarina Macfadyen ◽  
Ary A. Hoffmann
Keyword(s):  
Aphid Species ◽  
Crop Growth ◽  
Diaeretiella Rapae ◽  
Field Variation ◽  
Grain Crops ◽  
Growing Seasons ◽  
Crop Type ◽  
Eastern Australia ◽  
Crop Growth Stage ◽  
Hymenopteran Parasitoids

In grain crops, aphids are important pests, but they can be suppressed by hymenopteran parasitoids. A challenge in incorporating parasitoids into Integrated Pest Management (IPM) programs, however, is that parasitoid numbers can be low during periods within the season when aphids are most damaging. Understanding the population dynamics of key aphid species and their parasitoids is central to ameliorating this problem. To examine the composition and seasonal trends of both aphid and parasitoid populations in south-eastern Australia, samples were taken throughout the winter growing seasons of 2017 and 2018 in 28 fields of wheat and canola. Myzus persicae (Sulzer) was the most abundant aphid species, particularly within canola crops. Across all fields, aphid populations remained relatively low during the early stages of crop growth and increased as the season progressed. Seasonal patterns were consistent across sites, due to climate, crop growth stage, and interactions between these factors. For canola, field edges did not appear to act as reservoirs for either aphids or parasitoids, as there was little overlap in the community composition of either, but for wheat there was much similarity. This is likely due to the presence of similar host plants within field edges and the neighbouring crop, enabling the same aphid species to persist within both areas. Diaeretiella rapae (M’Intosh) was the most common parasitoid across our study, particularly in canola, yet was present only in low abundance at field edges. The most common parasitoid in wheat fields was Aphidius matricariae (Haliday), with field edges likely acting as a reservoir for this species. Secondary parasitoid numbers were consistently low across our study. Differences in parasitoid species composition are discussed in relation to crop type, inter-field variation, and aphid host. The results highlight potential focal management areas and parasitoids that could help control aphid pests within grain crops.

A new species of Glyptapanteles (Hymenoptera: Braconidae: Microgastrinae), a larval parasitoid of Elymnias hypermnestra (Linnaeus) (Lepidoptera: Nymphalidae), along with some new host records of parasitoids from Peninsular India

Zootaxa ◽  
2012 ◽  
Vol 3227 (1) ◽  
pp. 54 ◽  
Author(s):  
ANKITA GUPTA ◽  
BLAISE PEREIRA
Keyword(s):  
New Species ◽  
New Host ◽  
Peninsular India ◽  
Larval Parasitoid ◽  
Hymenopteran Parasitoids ◽  
First Time ◽  
A New Species ◽  
New Host Records

A new species, Glyptapanteles hypermnestrae Gupta and Pereira, is described from Maharashtra, India, and comparedwith closely allied species. This new species was bred from parasitized larvae of Elymnias hypermnestra (Linnaeus) (Lep-idoptera: Nymphalidae). In addition to this, two hymenopteran parasitoids, Apanteles folia Nixon (Braconidae: Microgas-trinae) and Brachymeria indica (Krausse) (Chalcididae), are for first time reported parasitizing larvae of Arhopalaamantes (Hewitson) (Lepidoptera: Lycaenidae) and pupae of Pareronia valeria (Cramer) (Lepidoptera: Pieridae) respectively.

Changes in Numbers in the Parasitoid Complex Associated With the Diamond-Back Moth, Plutella Xylostella (L.) (Lepidoptera), in Victoria.

1979 ◽  
Vol 27 (6) ◽  
pp. 981 ◽  
Author(s):  
S Goodwin
Keyword(s):  
High Temperatures ◽  
Plutella Xylostella ◽  
Winter Period ◽  
Parasitoid Species ◽  
Primary Parasitoid ◽  
Parasitoid Complex ◽  
Larval Parasitoids ◽  
Pesticide Treatment ◽  
Drought Conditions ◽  
Rate Of Recovery

Between 1972 and 1974, a study was made of parasitoids of P. xylostella naturally infesting four successive crops of cabbages which had not received any pesticide treatment. Parasitism fluctuated in each crop, averaging 49% during the study. The major parasitoid species were Diadegma cerophaga, Thyraeella collaris and Diadegma rapi, which averaged 93% of parasitism over the study period. Six minor primary parasitoid and one hyperparasite species were also recorded. Parasitoid activity was high during spring and summer, although extremely high temperatures during summer reduced numbers of both the host and its parasitoids. Drought conditions accentuated this. Parasitism in autumn depended upon the severity of this depletion and on the ensuing rate of recovery. The more important larval parasitoids were closely synchronized with host numbers, with a distinct lag during the winter period.

Parasitoid complex of Phyllonorycter robiniella (Clemens, 1859) (Lepidoptera, Gracillariidae) in Serbia

2005 ◽  
Vol 78 (2) ◽  
pp. 109-114 ◽  
Author(s):  
Aleksandar Stojanović ◽  
Čedomir Marković
Keyword(s):  
Parasitoid Complex

scholarly journals Naturalized Dolichogenidea gelechiidivoris Marsh (Hymenoptera: Braconidae) complement the resident parasitoid complex of Tuta absoluta (Meyrick) (Lepidopera:Gelechiidae) in Spain

2021 ◽  
Author(s):  
Carmen Denis ◽  
JORDI RIUDAVETS ◽  
OSCAR ALOMAR ◽  
NURIA AGUSTI ◽  
HELENA GONZALEZ-VALERO ◽  
...  
Keyword(s):  
Biological Control ◽  
Biocontrol Agent ◽  
Natural Populations ◽  
Tuta Absoluta ◽  
Parasitoid Complex ◽  
Parasitism Rates ◽  
Production Area ◽  
Side Walls ◽  
Predatory Mirid ◽  
First Time

Our study aimed to assess the contribution of natural parasitism due to Necremnus tutae Ribes & Bernardo (Hymenoptera: Eulophidae) to the biological control of Tuta absoluta (Meyrick) (Lepidopera:Gelechiidae) in commercial plots where an IPM program based on the use of predatory mirid bugs was implemented. During the samplings, the presence of another parasitoid was detected and, therefore, a second part of our study intended to identify this species and to evaluate the importance of its natural populations in the biological control of the pest. Leaflets with T. absoluta galleries were collected during 2017-2020 from commercial tomato plots in the horticultural production area of Catalonia (Northeast Spain), including greenhouses, open fields, and roof covered tunnels that lack side walls. In the laboratory, T. absoluta larvae were classified as ectoparasitized, alive, or dead. Reared parasitoids from ectoparasitized larvae were mostly morphologically identified as Necremnus sp. with parasitism rates that peaked in summer months with values between 9 and 15%. Some of these ectoparasitized larvae also yielded another parasitoid identified as Dolichogenidea gelechiidivoris Marsh (Hymenoptera: Braconidae) by both morphological and molecular-DNA barcoding methods. In 2020, parasitism rates due to D. gelechiidivoris that increased with season up to 22%. Our work reports for the first time in Europe the presence of the neotropical species D. gelechiidivoris adding this biocontrol agent to the resident parasitoid complex of T. absoluta in Spain.

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