Resistance of subspecies of Eucalyptus camaldulensis to galling by Leptocybe invasa : Could quinic acid derivatives be responsible for leaf abscission and reduced galling?

2021 ◽  
Author(s):  
Beryn Achieng Otieno ◽  
Juha‐Pekka Salminen ◽  
Martin James Steinbauer
Keyword(s):  
Eucalyptus Camaldulensis ◽  
Quinic Acid ◽  
Leaf Abscission ◽  
Leptocybe Invasa

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 First record of the eucalyptus gall wasp, Leptocybe invasa Fisher and La Salle (Hymenoptera: Eulophidae), in Iraq

2012 ◽  
Vol 65 (3) ◽  
pp. 93-98 ◽  
Author(s):  
Feyroz R. Hassan
Keyword(s):  
New Genus ◽  
Eucalyptus Camaldulensis ◽  
First Record ◽  
Kurdistan Region ◽  
New Genus And Species ◽  
Gall Wasp ◽  
Leptocybe Invasa ◽  
Eucalyptus Gall Wasp ◽  
First Time

The eucalyptus gall wasp, <em>Leptocybe invasa </em>(Hymenoptera: Eulophidae), is a new genus and species recorded for the first time in Duhok city, Kurdistan region, Iraq. <em>L. invasa </em>makes galls on petioles, leaf midribs and young branches of <em>Eucalyptus camaldulensis </em>saplings and trees. This galling eventually can lead to heavily injured saplings. The average number of galls was 37.23 gall/branch, and major infestation was on leaf midribs with an average of 19.35 galls.

Insect pest species of Eucalyptus in Gibraltar

2020 ◽  
Vol 156 (1) ◽  
pp. 51-57
Author(s):  
C. Malumphy ◽  
R. Guillem ◽  
C. Perez ◽  
K. Bensusan
Keyword(s):  
Insect Pest ◽  
Eucalyptus Camaldulensis ◽  
Pest Species ◽  
Bronze Bug ◽  
Glycaspis Brimblecombei ◽  
The Status ◽  
Leptocybe Invasa ◽  
Potential Impact ◽  
Phoracantha Recurva ◽  
First Time

Four invasive eucalypt-feeding insects, native to Australia, are recorded from Gibraltar for the first time: the gall-forming wasps Ophelimus maskelli (Ashmead) and Leptocybe invasa Fisher & La Salle (Hymenoptera: Eulophidae), the lerp-forming psyllid Glycaspis brimblecombei Moore (Hemiptera: Aphalaridae), and the bronze bug Thaumastocoris peregrinus Carpintero & Dellapé (Hemiptera: Thaumastocoridae), whilst the status of two Eucalyptus longhorned borers, Phoracantha recurva Newman and P. semipunctata (Fabricius) (Coleoptera: Cerambycidae), is summarised. The former five species have been found on the red-gum tree Eucalyptus camaldulensis Dehnh., growing in the urban environment in Gibraltar. The potential impact of these invasive species is discussed.

scholarly journals Susceptibilidad de Leptocybe invasa (Hymenoptera: Eulophidae) a insecticidas en invernadero

2020 ◽  
Vol 26 (2) ◽  
Author(s):  
Alfonso Luna-Cruz ◽  
Juan Manuel Vanegas-Rico ◽  
Esteban Rodríguez-Leyva ◽  
J. Refugio Lomeli-Flores
Keyword(s):  
Eucalyptus Camaldulensis ◽  
Leptocybe Invasa

La avispa agalladora del eucalipto, Leptocybe invasa, es una plaga de origen australiano que afecta a plantaciones de Eucalyptus spp. La especie Eucalyptus camaldulensis es el más susceptible hospedero y es ampliamente utilizado en el mundo para madera aserrada, pulpa y carbón; inclusive, es parte del arbolado urbano, como ocurre en varias ciudades de México. La naturaleza exótica de L. invasa y su desarrollo en agallas, dificulta su regulación natural por entomófagos nativos en este país, lo que representa una amenaza para las regiones productoras de eucaliptos y áreas urbanas. El presente estudio evaluó la eficiencia de insecticidas en condiciones de invernadero, mediante aplicación al suelo y foliar, sobre los estados inmaduros de la avispa: huevo, larva joven, larva madura y pupa, utilizando plantas de E. camaldulensis menores de un año. La aplicación de Carbofurán o Imidacloprid en suelo ocasionó mayor mortalidad en huevo (35% a 79%) y larva joven (40% a 75%), mientras que en larva madura y pupa causó una mortalidad baja (< 5%). La aplicación de Spirotetramat sobresalió en las aplicaciones foliares, pero no es suficiente por sí sola para controlar a la plaga (mortalidad < 40%). Con base en los resultados de esta investigación y los antecedentes de la literatura especializada, se sugiere que el manejo químico sobre L. invasa en invernaderos es factible pero solamente como medida emergente. Esto mediante la utilización de Carbofurán o Imidacloprid en aplicación al suelo alternado con una aplicación foliar posterior de Spirotetramat.

scholarly journals Annual study of Leptocybe invasa gall’s number Fisher & La Salle 2004 (Hymenoptera: Eulophidae) of Eucalyptus camaldulensis (Myrtaceae) in the North-East of Algeria

2020 ◽  
Vol 10 (5) ◽  
pp. 94-97
Author(s):  
Abdelmalek Oulmi ◽  
Noureddine Laadel ◽  
Farida Benia ◽  
Sofiane Guettaf
Keyword(s):  
Salt Content ◽  
Eucalyptus Camaldulensis ◽  
Eucalyptus Plantation ◽  
North East ◽  
The North ◽  
East Region ◽  
The Family ◽  
Leptocybe Invasa ◽  
Sea Wind ◽  
Harmful Species

Eucalyptus camaldulensis is an essence of the family Myrtaceae. It resists a certain salt content and the sea wind. Despite that, it subject to many factors of degradation as parasitic and harmful insects. In the last years, an insect is detected on the foliage of Eucalyptus  camaldulensis trees in Algeria (North-East region). The results made it possible evidence the presence of one harmful species Leptocybe invasa Fisher & La Salle 2004 (Hymenoptera: Eulophidae), this parasite has been detected in 2006, The Chronology of Gall’s emergence of Leptocybe  invasa and its field infestation rate were followed since 2010, in Eucalyptus plantation in the North-East Region. Some statistical methods of Gall’s emergence of this pest is reviewed and discussed. First, after exploration, we selected the most affected trees, second, we organized the samples of each tree, we respected the orientation (North-South-East-West). For each study site 10 trees were marked. 30 leaves of each tree were removed, so it is 300 leaves for each site, which were analyzed. We used the method of time series that connects the time with the number of galls. This study is based on the number of galls observed, on both sides of the leaves. In order to highlight the degree of attack of pests. The outputs were made from October 2012 to October 2013, due to two outputs per month. Keywords: Eucalyptus, gall wasps, Eulophidae, gall inducers, Algeria.

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