scholarly journals Psix striaticeps (Dodd) (Hymenoptera, Scelionidae): an Old World parasitoid of stink bug eggs arrives in Florida, USA

2021 ◽  
Vol 87 ◽  
pp. 503-521
Author(s):  
Sarah Birkmire ◽  
Cory Penca ◽  
Elijah J. Talamas ◽  
Matthew R. Moore ◽  
Amanda C. Hodges
Keyword(s):  
Biological Control ◽  
Biological Control Agent ◽  
Parasitoid Wasp ◽  
Egg Parasitoid ◽  
Control Agent ◽  
Western Hemisphere ◽  
Stink Bug ◽  
Stink Bugs ◽  
Old World ◽  
Piezodorus Guildinii

Psix striaticeps (Dodd) is an egg-parasitoid wasp previously known only from the Old World. We report this species from twelve counties in Florida, which are the first records in the Western Hemisphere. It was collected in yellow cylinder traps and reared from the eggs of three stink bug species: Nezara viridula L., Chinavia marginata (Palisot de Beauvois), and Piezodorus guildinii (Westwood). A COI barcode analysis found a 100% match between the Floridian population and a specimen from South Africa. The prospects of using Ps. striaticeps as a biological control agent against exotic stink bugs are discussed.

Physiological Host Range of Trissolcus Mitsukurii, A Candidate Biological Control Agent of Halyomorpha Halys

2021 ◽  
Author(s):  
Lucrezia Giovannini ◽  
Giuseppino Sabbatini-Peverieri ◽  
Leonardo Marianelli ◽  
Gabriele Rondoni ◽  
Eric Conti ◽  
...  
Keyword(s):  
Biological Control ◽  
Host Range ◽  
Biocontrol Agent ◽  
Biological Control Agent ◽  
Classical Biological Control ◽  
Egg Parasitoid ◽  
Control Agent ◽  
Egg Load ◽  
Halyomorpha Halys ◽  
Stink Bug

Abstract The invasive stink bug Halyomorpha halys is a severe agricultural pest of worldwide importance, and chemical insecticides are largely sprayed for the control of its populations. Negative impacts and several failures in chemical pest management led to consider classical biological control as one of the most promising methods in a long-term perspective. The Asian egg parasitoid Trissolcus japonicus is the main candidate biocontrol agent of H. halys, but more recently a second Asian egg parasitoid, Trissolcus mitsukurii, is getting attention after adventive populations were found on H. halys egg masses in Europe. Before recommending the use of T. mitsukurii for biological control of H. halys, a risk analysis is necessary and therefore here we present the first study on the fundamental physiological host range of this parasitoid in Europe. Tests conducted with T. mitsukurii on different hemipterans, using three different experimental designs, revealed a broad physiological host range, comparable with the host range displayed by T. japonicus under similar laboratory conditions. Specifically, in addition to its coevolved host H. halys, T. mitsukurii successfully parasitized the majority of tested pentatomid species and one scutellerid, although with highly variable emergence rates. Host egg sizes positively affected parasitoid size and female egg load. Further studies, testing more complex systems that involve olfactory cues from host and host plants, will simulate different aspects of the parasitoid host location behavior under field conditions, allowing in-depth evaluation of the possible risks associated with the use of T. mitsukurii as a biocontrol agent of H. halys.

scholarly journals  Gryon aetherium Talamas (Hymenoptera, Scelionidae): Parasitoid of Bagrada hilaris (Burmeister) (Hemiptera, Pentatomidae) Adventive in Chile

2021 ◽  
Vol 87 ◽  
pp. 493-501
Author(s):  
N. Rocío Rojas-Gálvez ◽  
Elijah Talamas ◽  
Marta V. Albornoz ◽  
M. Fernanda Flores ◽  
Wilson Barros-Parada ◽  
...  
Keyword(s):  
Biological Control ◽  
South America ◽  
Biological Control Agent ◽  
Parasitoid Wasp ◽  
Molecular Data ◽  
Control Agent ◽  
Stink Bug ◽  
Taxonomic Treatment ◽  
Morphological And Molecular Data

A parasitoid wasp, Gryon aetherium Talamas (Hymenoptera, Scelionidae), was reared from eggs of the invasive stink bug Bagrada hilaris (Burmeister) (Hemiptera, Pentatomidae) in Chile. The identification of G. aetherium, which is under study as a biological control agent, was made with morphological and molecular data in the context of a recent taxonomic treatment of this species. The presence of an adventive population of G. aetherium in South America has implications for biological control of B. hilaris in Chile, and other countries on the continent, where this stink bug may become a pest.

Taxonomic modifications in Tylospilus Stål (Hemiptera: Pentatomidae: Asopinae): redescription of T. nigrobinotatus (Berg), description of a new species and an updated identification key for the genus 

Zootaxa ◽  
2020 ◽  
Vol 4766 (1) ◽  
pp. 128-138
Author(s):  
RICARDO BRUGNERA ◽  
MARCELO REGINATO PAIM ◽  
TALITA ROELL ◽  
GIMENA DELLAPÉ ◽  
JOCELIA GRAZIA
Keyword(s):  
Biological Control ◽  
New Species ◽  
New World ◽  
Biological Control Agent ◽  
Control Agent ◽  
Identification Key ◽  
Stink Bugs ◽  
Common Occurrence ◽  
Type Specimens ◽  
A New Species

The systematics of the New World Asopinae genera is still not completely understood, thus hampering their study in many areas of biological science. Tylospilus Stål is one of the less known genera among New World predatory stink bugs, despite its common occurrence and potential as a biological control agent in crops. Here, we make a contribution to the knowledge of Tylospilus; the species Tylospilus nigrobinotatus (Berg, 1879) is redescribed, and based upon the examination of type specimens, T. armatus Thomas, 1992 is considered to be a junior synonym of the above species. Furthermore, a new species is herein described, and an updated identification key for the species of Tylospilus is provided. 

scholarly journals Hybrid Genome Assembly and Evidence-Based Annotation of the Egg Parasitoid and Biological Control Agent Trichogramma brassicae

2020 ◽  
Vol 10 (10) ◽  
pp. 3533-3540 ◽  
Author(s):  
Kim B. Ferguson ◽  
Tore Kursch-Metz ◽  
Eveline C. Verhulst ◽  
Bart A. Pannebakker
Keyword(s):  
Biological Control ◽  
De Novo ◽  
Biological Control Agent ◽  
Egg Parasitoid ◽  
Control Agent ◽  
Evidence Based ◽  
Trichogramma Brassicae ◽  
A Genome ◽  
Hybrid Genome ◽  
Essential Resource

Trichogramma brassicae (Bezdenko) are egg parasitoids that are used throughout the world as biological control agents and in laboratories as model species. Despite this ubiquity, few genetic resources exist beyond COI, ITS2, and RAPD markers. Aided by a Wolbachia infection, a wild-caught strain from Germany was reared for low heterozygosity and sequenced in a hybrid de novo strategy, after which several assembling strategies were evaluated. The best assembly, derived from a DBG2OLC-based pipeline, yielded a genome of 235 Mbp made up of 1,572 contigs with an N50 of 556,663 bp. Following a rigorous ab initio-, homology-, and evidence-based annotation, 16,905 genes were annotated and functionally described. As an example of the utility of the genome, a simple ortholog cluster analysis was performed with sister species T. pretiosum, revealing over 6000 shared clusters and under 400 clusters unique to each species. The genome and transcriptome presented here provides an essential resource for comparative genomics of the commercially relevant genus Trichogramma, but also for research into molecular evolution, ecology, and breeding of T. brassicae.

scholarly journals Hybrid genome assembly and evidence-based annotation of the egg parasitoid and biological control agent Trichogramma brassicae

2020 ◽  
Author(s):  
K. B. Ferguson ◽  
T. Kursch-Metz ◽  
E. C. Verhulst ◽  
B. A. Pannebakker
Keyword(s):  
Biological Control ◽  
De Novo ◽  
Biological Control Agent ◽  
Egg Parasitoid ◽  
Control Agent ◽  
Evidence Based ◽  
Trichogramma Brassicae ◽  
A Genome ◽  
Hybrid Genome ◽  
Essential Resource

ABSTRACTTrichogramma brassicae (Bezdenko) are egg parasitoids that are used throughout the world as biological control agents and in laboratories as model species. Despite this ubiquity, few genetic resources exist beyond COI, ITS2, and RAPD markers. Aided by a Wolbachia infection, a wild-caught strain from Germany was reared for low heterozygosity and sequenced in a hybrid de novo strategy, after which several assembling strategies were evaluated. The best assembly, derived from a DBG2OLC-based pipeline, yielded a genome of 235 Mbp made up of 1,572 contigs with an N50 of 556,663 bp. Following a rigorous ab initio-, homology-, and evidence-based annotation, 16,905 genes were annotated and functionally described. As an example of the utility of the genome, a simple ortholog cluster analysis was performed with sister species T. pretiosum, revealing over 6000 shared clusters and under 400 clusters unique to each species. The genome and transcriptome presented here provides an essential resource for comparative genomics of the commercially relevant genus Trichogramma, but also for research into molecular evolution, ecology, and breeding of T. brassicae.

scholarly journals Unexpected parasitism of Douglas-fir seed chalcid limits biocontrol options for invasive Douglas-fir in New Zealand

2021 ◽  
Vol 74 (1) ◽  
pp. 70-77
Author(s):  
Sonia Lee ◽  
Simon V. Fowler ◽  
Claudia Lange ◽  
Lindsay A. Smith ◽  
Alison M. Evans
Keyword(s):  
Biological Control ◽  
New Zealand ◽  
Seed Production ◽  
Biocontrol Agent ◽  
Biological Control Agent ◽  
Parasitoid Wasp ◽  
Control Agent ◽  
Douglas Fir ◽  
Seed Predator ◽  
High Level

Douglas-fir seed chalcid (DFSC) Megastigmus spermotrophus, a small (3 mm long) host-specific seed-predatory wasp, was accidentally introduced into New Zealand in the 1920s. Concern over DFSC reducing Douglas-fir seed production in New Zealand led to an attempt at biocontrol in 1955 with the release, but failed establishment, of the small (2.5 mm long) parasitoid wasp, Mesopolobus spermotrophus. We investigated why DFSC causes little destruction of Douglas-fir seed in New Zealand (usually <20%) despite the apparent absence of major natural enemies. Douglas-fir seed collections from 13 New Zealand sites yielded the seed predator (DFSC) but also potential parasitoids, which were identified using morphology and partial COI DNA sequencing. DFSC destroyed only 0.15% of Douglas-fir seed. All parasitoids were identified as the pteromalid wasp, Mes. spermotrophus, the host-specific biocontrol agent released in 1955. Total parasitism was 48.5%, but levels at some sites approached 90%, with some evidence of density-dependence. The discovery of the parasitoid Mes. spermotrophus could indicate that the biocontrol agent released in 1955 did establish after all. Alternatively, Mes. spermotrophus could have arrived accidentally in more recent importations of Douglas-fir seed. The high level of parasitism of DFSC by Mes. spermotrophus is consistent with DFSC being under successful biological control in New Zealand. Suppression of DFSC populations will benefit commercial Douglas-fir seed production in New Zealand, but it also represents the likely loss of a potential biological control agent for wilding Douglas-fir.

scholarly journals IDENTIFIKASI DAN UJI KAPASITAS REPRODUKSI PARASITOID TELUR ULAT PENGGEREK BUAH MERAH JAMBU PADA TANAMAN KAPAS

2020 ◽  
Vol 11 (3) ◽  
pp. 94
Author(s):  
DWI ADI SUNARTO ◽  
NURINDAH NURINDAH ◽  
SUJAK SUJAK
Keyword(s):  
Biological Control ◽  
Gossypium Hirsutum ◽  
Key Words ◽  
Biological Control Agent ◽  
Egg Parasitoid ◽  
Control Agent ◽  
Pectinophora Gossypiella ◽  
Control Actions ◽  
Key Words Cotton ◽  
Trichogrammatoidea Bactrae

<p>ABSTRAK<br />Pectinophora gossypiella merupakan salah satu hama utama<br />tanaman kapas yang menyerang dengan cara menggerek buah. Mulai<br />stadia larva kecil hingga pupa berada di dalam buah. Perilaku tersebut<br />menjadi salah satu sebab kurang efektifnya beberapa cara pengendalian P.<br />gossypiella dengan sasaran stadia larva. Untuk itu, peluang yang<br />diharapkan akan memberikan hasil pengendalian yang lebih baik adalah<br />sasaran pada stadia telur yaitu antara lain pemanfaatan parasitoid telur.<br />Dari hasil eksplorasi telah diperoleh parasitoid telur Trichogrammatidae<br />yang berasal dari pertanaman kapas di Lamongan dan Asembagus, Jawa<br />Timur. Penelitian ini bertujuan untuk mengidentifikasi spesies parasitoid<br />telur P. gossypiella dan kapasitas reproduksinya. Penelitian ini<br />dilaksanakan di Balai Penelitian Tanaman Tembakau dan Serat Malang<br />pada bulan Maret - Desember 2002. Hasil penelitian menunjukkan bahwa<br />parasitoid telur Trichogrammatidae yang muncul dari telur P. gossypiella<br />yang berasal dari kedua lokasi, berasal dari spesies yang sama dan berbeda<br />dengan spesies T. armigera yang memarasit telur H. armigera.<br />Berdasarkan kapasitas reproduksinya, Trichogrammatoidea bactrae N &amp; N<br />berpotensi sebagai agens hayati pengendali ulat penggerek buah kapas<br />merah jambu P. gossypiella.<br />Kata kunci : Kapas,  Gossypium  hirsutum,  hama,  Pectinophora<br />gossypiella,  parasitoid  telur,  Trichogrammatidae,  laju<br />pertumbuhan</p><p><br />ABSTRACT<br />Identification and reproduction capacity test of egg<br />parasitoid pink bollworm, Pectinophora gossypiella<br />Saunders on cotton<br />Pectinophora gossypiella is one of main pests of cotton. It attacks<br />the boll since small larvae until pupae and the insect is located in the boll.<br />This could be the reason why any control actions targeted to the larvae<br />were not effective. Therefore, the use of egg parasitoid to control the<br />bollworm population would be more promising. Exploration of the egg<br />parasitoid of the bollworm was done in Lamongan and Asembagus, East<br />Java. The parasitoids were considered as new locality report. This study<br />was to identify egg parasitoid of P. gossypiella and to study their<br />reproduction capacity. The study was conducted in Biological Control<br />Laboratory of IToFCRI Malang, March – December 2002. The study<br />included identification morphologically and biosystematically. The results<br />showed that Trichogrammatid emerged from P. gossypiella egg collected<br />from Asembagus (Trichogrammatoidea sp-A) and Lamongan (Trichogra-<br />mmatoidea sp-L) were the same species. Based on the reproduction<br />capacity of the parasitoids, Trichogrammatoidea bactrae N &amp; N were<br />potential as biological control agent for P. gossypiella.<br />Key words : Cotton,  Gossypium  hirsutum,  pest,  Pectinophora<br />gossypiella, egg parasitoid, Trichogrammatidae, intrinsic<br />rate</p>

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