scholarly journals Genetic Diversity of the Invasive Gall Wasp Leptocybe invasa (Hymenoptera: Eulophidae) and of its Rickettsia Endosymbiont, and Associated Sex-Ratio Differences

PLoS ONE ◽  
2015 ◽  
Vol 10 (5) ◽  
pp. e0124660 ◽  
Author(s):  
Francesco Nugnes ◽  
Marco Gebiola ◽  
Maurilia Maria Monti ◽  
Liberata Gualtieri ◽  
Massimo Giorgini ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Sex Ratio ◽  
Gall Wasp ◽  
Leptocybe Invasa

scholarly journals Biological traits of Quadrastichus mendeli (Hymenoptera, Eulophidae), parasitoid of the eucalyptus gall wasp Leptocybe invasa (Hymenoptera, Eulophidae) in Thailand

Parasite ◽  
2019 ◽  
Vol 26 ◽  
pp. 8
Author(s):  
Benjakhun Sangtongpraow ◽  
Kosol Charernsom
Keyword(s):  
Developmental Time ◽  
Egg Load ◽  
Biological Traits ◽  
Female Size ◽  
Gall Wasp ◽  
Potential Fecundity ◽  
The Mean ◽  
Leptocybe Invasa ◽  
Eucalyptus Gall Wasp ◽  
Honey Solution

Quadrastichus mendeli Kim & La Salle, a parasitoid of Leptocybe invasa Fisher & La Salle, is a uniparental species. This study assessed the biological traits of Q. mendeli in the laboratory at a temperature of 27 ± 1 °C. Diets had a highly significant effect on the mean longevity of female Q. mendeli. Feeding honey solution prolonged the mean longevity of the parasitoid to 4.80 days. The estimated 50% survival period was 3 days. The mean potential fecundity in all ages was 8.85 eggs per female. Age had a highly significant effect on the mean egg load. There was a positive relationship between egg load and female size. The mean of realized fecundity throughout the life span was 2.47 progenies per female. The mean developmental time of Q. mendeli from the egg to adult stage was 27.06 days. The shorter developmental time of Q. mendeli in comparison to its host can be considered a reason for the successful control of L. invasa in Thailand.

Gall Wasp Leptocybe invasa (Hymenoptera: Eulophidae) Management in Eucalypts

2015 ◽  
Vol 29 (1) ◽  
pp. 20 ◽  
Author(s):  
J. Prasanth Jacob ◽  
K. Senthil ◽  
V. Sivakumar ◽  
R. Seenivasan ◽  
P. Chezhian ◽  
...  
Keyword(s):  
Gall Wasp ◽  
Leptocybe Invasa

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.

Offspring sex ratio and reproductive tactics of Leptocybe invasa (Hymenoptera: Eulophidae): testing the effect of environmental characteristics

2018 ◽  
Vol 38 (04) ◽  
pp. 394-399 ◽  
Author(s):  
Xia-Lin Zheng ◽  
Kai Lin ◽  
Zong-You Huang ◽  
Jun Li ◽  
Zhen-De Yang ◽  
...  
Keyword(s):  
Sex Ratio ◽  
Insect Pest ◽  
Thermal Acclimation ◽  
Reproductive Tactics ◽  
Environmental Characteristics ◽  
Offspring Sex Ratio ◽  
Significant Difference ◽  
Offspring Sex ◽  
Leptocybe Invasa ◽  
D 12

AbstractEnvironmental characteristics (for example, temperature, photoperiod) as seasonal cues can affect the offspring sex ratio and reproductive tactics of many hymenopteran insects. Leptocybe invasa Fisher &amp; La Salle is the most critical invasive insect pest of Eucalyptus spp. in the world and displays thelytokous reproduction. In the current study, we studied the effects of temperature and photoperiod on offspring sex ratio and reproductive tactics in L. invasa. Results show that sex ratio (female: male) of L. invasa was under 15, 25 and 35 °C with both L 12: D 12 and L 16: D 8, and cold and thermal acclimation were 74.5:1, 71.0:1, 59.0:0, 17.3:1, 53.0:0, 64.0:0, 47.0:1 and 56.0:0, respectively, which was highly significantly female biased and with no significant difference due to temperature or photoperiod. Offspring virgin females oviposited and induced the bump-shaped galls on plants under the same conditions as described above. Constant temperature, photoperiod and their interaction, and cold and thermal acclimation had no significant effect on the infestation rates of Eucalyptus branches induced by offspring virgin females. Thus, temperature, photoperiod and cold and thermal acclimation did not influence female-biased sex ratio and tactics with thelytokous reproduction of offspring females in L. invasa.

scholarly journals First record of eucalyptus gall wasp Leptocybe invasa (Hymenoptera: Eulophidae) in Mexico

2015 ◽  
Vol 86 (4) ◽  
pp. 1095-1098 ◽  
Author(s):  
Juan Manuel Vanegas-Rico ◽  
José Refugio Lomeli-Flores ◽  
Esteban Rodríguez-Leyva ◽  
Eduardo Jiménez-Quiroz ◽  
Juli Pujade-Villar
Keyword(s):  
First Record ◽  
Gall Wasp ◽  
Leptocybe Invasa ◽  
Eucalyptus Gall Wasp

Biology and host preference of Selitrichodes neseri: A potential biological control agent of the Eucalyptus gall wasp, Leptocybe invasa

2014 ◽  
Vol 78 ◽  
pp. 33-41 ◽  
Author(s):  
Gudrun Dittrich-Schröder ◽  
Marlene Harney ◽  
Stefan Neser ◽  
Tanya Joffe ◽  
Samantha Bush ◽  
...  
Keyword(s):  
Biological Control ◽  
Host Preference ◽  
Biological Control Agent ◽  
Control Agent ◽  
Gall Wasp ◽  
Leptocybe Invasa ◽  
Eucalyptus Gall Wasp

scholarly journals Effective population size of an offshore population of bottlenose dolphins, Tursiops truncatus, from the São Pedro and São Paulo Archipelago, Brazil

10.5597/00225 ◽  
2017 ◽  
Vol 11 (1-2) ◽  
pp. 162-169 ◽  
Author(s):  
Larissa R. Oliveira ◽  
Paulo Henrique Ott ◽  
Ignacio B. Moreno ◽  
Maurício Tavares ◽  
Salvatore Siciliano ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Sex Ratio ◽  
Population Size ◽  
Effective Population Size ◽  
Tursiops Truncatus ◽  
Bottlenose Dolphins ◽  
Sao Paulo ◽  
Primary Concern ◽  
São Paulo ◽  
Effective Population

The São Pedro and São Paulo Archipelago (SPSPA) (00°56’N, 29°22’W) lies approximately 1010km northeast off the coast of Rio Grande do Norte State in Brazilian waters. Recently, through photo-identification and group size analysis, around 20-30 individual bottlenose dolphins, Tursiops truncatus, from SPSPA were recognized as a resident, and potentially genetically isolated, population. The effective population size (Ne), not the census number (Nc), as well the sex ratio, are of primary concern from an evolutionary and conservation management perspectives. The estimate of Ne reflects the number of individuals responsible for the maintenance of genetic diversity of a species or population as well its evolutionary potential. For this reason, we present here the first Ne and sex ratio estimates for the bottlenose dolphin population from SPSPA. Sex was molecularly determined for 19 biopsy samples collected from bottlenose dolphins from SPSPA between January and February 2005. The Newas estimated by direct counting of reproductive adults sexed by DNA analysis. The resulting Ne was 12 individuals and the sex ratio was 1.11 male to 1 female, however, it was not significantly different from the expected 1:1 ratio (χ2 test, α= 0.05; df = 1). The effective population size based on the genetic diversity of 19 sequences of the mtDNA control region resulted in a female effective population size of 223 individuals, and the total long-term effective size of ~470 individuals. We believe that the estimated Ne for the SPSPA population is a critical value, because it is significantly lower than the mean minimum viable population (MVP) suggested for vertebrates (around 5000 breeding age adults). This small Ne is of great concern and should be taken into account in future management plans to ensure the conservation and protection of this small population at SPSPA.

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