A female attractant for the blue gum chalcid, Leptocybe invasa (Hymenoptera: Eulophidae), from host plant (DH 201-2: Eucalyptus grandis × Eucalyptus tereticornis)

2019 ◽  
Vol 13 (4) ◽  
pp. 603-610 ◽  
Author(s):  
Tao Ma ◽  
Laijiao Lan ◽  
Na Lin ◽  
Lifei Zheng ◽  
Zhaohui Sun ◽  
...  
Keyword(s):  
Host Plant ◽  
Eucalyptus Grandis ◽  
Eucalyptus Tereticornis ◽  
Leptocybe Invasa ◽  
Female Attractant ◽  
Blue Gum

scholarly journals Management of Blue Gum Chalcid (Leptocybe invasa Fisher & La Salle (Hymenoptera: Eulophidae) infestation on different species of Eucalyptus trees in Kalu district, Eastern Amhara, Ethiopia

2020 ◽  
Vol 13 (3) ◽  
pp. 197-214
Author(s):  
Tigabu Redae Alle ◽  
Adane Tesfaye Lema ◽  
Seid Muhie Dawud
Keyword(s):  
Tree Species ◽  
Insect Pests ◽  
Block Design ◽  
Insect Pest ◽  
Eucalyptus Camaldulensis ◽  
Pest Infestation ◽  
Randomized Complete Block Design ◽  
Leptocybe Invasa ◽  
Control Application ◽  
Blue Gum

The recently introduced chalcid pest known as the Blue Gum Chalcid (BGC) (L. invasa) is currently one of the major insect pests of Eucalyptus tree species in Ethiopia. A research was conducted in Kalu district, South Wollo, Eastern Amhara, Ethiopia, the main objective of which was to evaluate the effectiveness of synthetic insecticides, hoeing and water showering options against BGC. Two parallel experiments were conducted in the nursery and in the field. Eucalyptus camaldulensis, E. saligna, E. viminalis, E. citrodora and E. globulus were considered in the nursery at Chorisa. One to three-year old E. camaldulensis plantations were considered at Tikuro plantation site. At the nursery, seven treatments and at the field 10 treatments were tested in a Randomized Complete Block Design (RCBD) with three replications from January to February 2019, where treatments were applied 3 times at 15-day intervals. Results from the 1-year old plantation revealed that application of Dimethoate 40%, Carbofuran 3G and Dimethoate 40% + hoeing followed by Carbofuran 3G + hoeing and Thiamethoxam 25WG were effective in checking the BGC insect pest infestation. In the 3-year old plantation, Carbofuran 3G significantly reduced the infestation followed by Dimethoate 40%. At the nursery, Dimethoate 40% and Carbofuran 3G reduced the infestation followed by Carbofuran 3G + Dimethoate 40% and thiamethoxam 25WG. Water showering and hoeing did not reduce BGC infestation in all cases at the field plantations. Treatments that received synthetic insecticides and hoeing had low infestation, the reason for which was the insecticide rather than the hoeing, because the hoeing alone didn’t differ from the control. Application of Dimethoate 40% and Carbofuran 3G with hoeing and weeding activities were recommended to manage and limit BGC insect pest infestations.

scholarly journals A Genome-Wide Association Study for Resistance to the Insect Pest Leptocybe invasa in Eucalyptus grandis Reveals Genomic Regions and Positional Candidate Defense Genes

2020 ◽  
Vol 61 (7) ◽  
pp. 1285-1296
Author(s):  
Lorraine Mhoswa ◽  
Marja M O’Neill ◽  
Makobatjatji M Mphahlele ◽  
Caryn N Oates ◽  
Kitt G Payn ◽  
...  
Keyword(s):  
Association Study ◽  
Genome Wide Association Study ◽  
Eucalyptus Grandis ◽  
Nucleotide Binding ◽  
Snp Markers ◽  
Genome Wide Association ◽  
Genome Wide ◽  
A Genome ◽  
Leptocybe Invasa ◽  
Genomic Regions

Abstract The galling insect, Leptocybe invasa, causes significant losses in plantations of various Eucalyptus species and hybrids, threatening its economic viability. We applied a genome-wide association study (GWAS) to identify single-nucleotide polymorphism (SNP) markers associated with resistance to L. invasa. A total of 563 insect-challenged Eucalyptus grandis trees, from 61 half-sib families, were genotyped using the EUChip60K SNP chip, and we identified 15,445 informative SNP markers in the test population. Multi-locus mixed-model (MLMM) analysis identified 35 SNP markers putatively associated with resistance to L. invasa based on four discreet classes of insect damage scores: (0) not infested, (1) infested showing evidence of oviposition but no gall development, (2) infested with galls on leaves, midribs or petioles and (3) stunting and lethal gall formation. MLMM analysis identified three associated genomic regions on chromosomes 3, 7 and 8 jointly explaining 17.6% of the total phenotypic variation. SNP analysis of a validation population of 494 E. grandis trees confirmed seven SNP markers that were also detected in the initial association analysis. Based on transcriptome profiles of resistant and susceptible genotypes from an independent experiment, we identified several putative candidate genes in associated genomic loci including Nucleotide-binding ARC- domain (NB-ARC) and toll-interleukin-1-receptor-Nucleotide binding signal- Leucine rich repeat (TIR-NBS-LRR) genes. Our results suggest that Leptocybe resistance in E. grandis may be influenced by a few large-effect loci in combination with minor effect loci segregating in our test and validation populations.

New Record of Insect Pests on Seedlings of Eucalyptus

2015 ◽  
Vol 38 (2) ◽  
pp. 117-124
Author(s):  
N. Roychoudhury ◽  
Subhash Chandra ◽  
Ram Singh ◽  
Shashi Barve ◽  
Anand Das
Keyword(s):  
New Record ◽  
Insect Pests ◽  
Insect Pest ◽  
First Record ◽  
Eurema Hecabe ◽  
Achaea Janata ◽  
Leptocybe Invasa ◽  
Hyposidra Talaca ◽  
Lepidoptera Noctuidae ◽  
Blue Gum

The present paper reports the occurrence of insects damaging Eucalyptus in nursery stage. Out of nine insects recorded, seven species observed as occasional defoliating species, viz. Achaea janata (Linnaeus) (Lepidoptera : Noctuidae), Catapsilia crocale Cramer (Lepidoptera : Pieridae), Dasychira grotei Moore (Lepidoptera : Lymantriidae), Eurema hecabe Linnaeus (Lepidoptera : Pieridae), Hyposidra talaca (Walker) (Lepidoptera : Geometridae), Lymantria sobrina Moore (Lepidoptera : Lymantriidae) and Spodoptera litura (Fabricius) (Lepidoptera : Noctuidae), one rare sap-sucking species, Chrysocoris purpureus Westwood (Heteroptera : Pentatomodae) and one gall making species, Leptocybe invasa Fisher & LaSalle (Hymenoptera : Eulophidae). Among the nine species collected, six defoliators and one sap sucker are new addition to the Eucalyptus entomology. Further, H. talaca is the first record of occurrence on Eucalyptus in India. On the basis of percentage infestation/damage caused by above insects, L. invasa, commonly known as blue gum chalcid wasp, was recorded only as a key insect pest in nursery stage of Eucalyptus. The results have been discussed in the light of the present observations.

scholarly journals Anatomía y morfogénesis de las agallas producidas por Leptocybe invasa en plantas de Eucalyptus

2015 ◽  
Vol 50 (2) ◽  
pp. 141-151 ◽  
Author(s):  
Ana M. Gonzalez ◽  
Stella M. Solís
Keyword(s):  
Eucalyptus Grandis ◽  
Leptocybe Invasa

: Leptocybe invasa o “avispa de la agalla del eucalipto”, es un microhimenóptero gallícola que ovipone en hojas jóvenes de eucaliptos. La planta responde formando agallas, que causan enrollamiento, defoliación y colapso de brotes, afectando seriamente la producción. En este trabajo se analizan los cambios morfogenéticos y anatómicos provocados por el desarrollo de las agallas, comparándolos con plantas sanas. Con técnicas tradicionales de microscopía óptica y electrónica de barrido se estudiaron ejemplares de Eucalyptus grandis y E. camaldulensis, cultivados en Corrientes, Argentina. La avispa ovipone entre los haces vasculares, el vegetal produce un tejido hiperplásico que se diferencia en cuatro estratos: nutricio, esclerosado, tanífero y cristalífero. El recorrido de los tejidos vasculares se obstruye, produciéndose “bucles xilemáticos” que interrumpen el flujo normal de agua y fotosintatos. Analizando los cambios morfológicos y anatómicos, junto al desarrollo del insecto, se divide el ciclo en tres etapas. Este trabajo demuestra que la formación de agallas en Eucalyptus representa un excelente ejemplo de fenotipo extendido, donde la acción de L. invasa induce al crecimiento anormal de los tejidos vegetales, tanto en aumento del número de células, colapso del sistema vascular de la zona afectada y aparición de nuevas características anatómicas.

scholarly journals Longevity and survival ofLeptocybe invasa(Hymenoptera: Eulophidae), an invasive gall inducer onEucalyptus, with different diets and temperatures

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5265 ◽  
Author(s):  
Amanda Rodrigues De Souza ◽  
Leonardo Rodrigues Barbosa ◽  
José Raimundo de Souza Passos ◽  
Bárbara Monteiro de Castro e Castro ◽  
José Cola Zanuncio ◽  
...  
Keyword(s):  
Management Strategies ◽  
Distilled Water ◽  
Eucalyptus Leaves ◽  
Different Temperatures ◽  
Biological Aspects ◽  
Leptocybe Invasa ◽  
Reproductive Females ◽  
Honey Solution ◽  
Gall Inducer ◽  
Blue Gum

The blue gum chalcid,Leptocybe invasaFisher & LaSalle (Hymenoptera: Eulophidae), causes galls onEucalyptusspp. leaf midribs, petioles and stems.Biological aspects need to be studied to assist in developing management strategies and to maintain this insect in the laboratory to rear the parasitoidSelitrichodes neseriKelly & La Salle (Hymenoptera: Eulophidae) that depends on having a supply ofEucalyptusseedlings infested byL. invasa.We evaluated the longevity and survival ofL. invasaindividual non reproductive females fed with six different diets (pure honey, 50% honey solution, pure honey plus eucalyptus leaves, eucalyptus leaves, distilled water, or no food) and seven different temperatures (10, 14, 18, 22, 26, 30 and 34 °C).Leptocybe invasafed with 50% honey solution and reared at 14 or 18 °C showed the greatest longevity and survival.

scholarly journals Leptocybe invasa (HYMENOPTERA: EULOPHIDAE) EM MUDAS DE EUCALIPTO NO ESTADO DE SANTA CATARINA, BRASIL

2018 ◽  
Vol 28 (4) ◽  
pp. 1770
Author(s):  
Leonardo Rodrigues Barbosa ◽  
Angelo Peruffo Rodrigues ◽  
Amanda Rodrigues de Souza ◽  
Barbara De Oliveira Puretz ◽  
Carlos Frederico Wilcken ◽  
...  
Keyword(s):  
Eucalyptus Grandis ◽  
Santa Catarina ◽  
Leptocybe Invasa

A vespa-da-galha, Leptocybe invasa Fisher & La Salle (Hymenoptera: Eulophidae), originária da Austrália, pode danificar severamente plantas de eucalipto (Myrtaceae). Este inseto foi registrado em mudas de Eucalyptus grandis em maio de 2015 no município de Treze de Maio, Estado de Santa Catarina, Brasil.

scholarly journals Registro de Leptocybe invasa no estado de Goiás

2014 ◽  
Vol 44 (10) ◽  
pp. 1721-1724
Author(s):  
Jaqueline Magalhães Pereira ◽  
Aniela Pilar Campos de Melo ◽  
Ohana Daroszewki Rodrigues ◽  
Thaíse Karla Ribeiro Dias ◽  
Carlos Frederico Wilcken
Keyword(s):  
Eucalyptus Grandis ◽  
Leptocybe Invasa

Registra-se a primeira ocorrência de Leptocybe invasa Fisher & La Salle (Hymenoptera: Eulophidae) no estado de Goiás em Eucalyptus grandis Hill ex Maiden. A detecção ocorreu no município de Goiânia.

Development of Galls in Eucalyptus Due to Infestation of Leptocybe invasa and Its Effects on Growth of Seedlings.

2018 ◽  
Vol 41 (1) ◽  
pp. 77-81
Author(s):  
N. Roychoudhury ◽  
Keyword(s):  
Growth And Development ◽  
Inverse Relationship ◽  
Maximum Growth ◽  
Practical Application ◽  
Young Leaves ◽  
Collar Diameter ◽  
Leptocybe Invasa ◽  
Growth Of Seedlings ◽  
Blue Gum ◽  
Chalcid Wasp

Leptocybe invasa Fisher & LaSalle (Hymenoptera : Eulophidae), commonly known as blue gum chalcid wasp, is a major gall making insect species of eucalyptus, causing serious damage to seedlings in nursery stage. An insectary/nursery of eucalyptus was developed at this Institute to study the stages of gall development, number of galls formed with the age of seedling and effects of galls on the growth of seedling. Results revealed that there are five distinct stages of gall development, first stage initiates by the insertion of eggs on the epidermis of soft young leaves, petioles and stems and final stage ends with the emergence of adult wasps from galls through exit holes. It was observed that the development of galls start after one month age of seedlings, and there was significant (P<0.05-P<0.01) variation in growth (height and collar diameter), number of galls in leaves, petioles and stems, and total number of galls/seedling in respect of age. The data clearly exhibited that one month old seedlings were free from the attack of L. invasa as because there was complete absence of galls. Further, it was recorded that seedlings growth (height and collar diameter) was affected by the development of galls, minimum growth was recorded in case of maximum galls developed whereas less galls were noticed for maximum growth of seedlings. There was an inverse relationship exists between seedling growth and development of galls. The practical application of findings was discussed in the light of the present observations.

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