Susceptibility of eucalypt taxa to a natural infestation by Leptocybe invasa

Silva, Paulo Roberto Arbex; Junqueira, Luis Renato; Araújo, Márcio José de; Wilcken, Carlos Frederico; Moraes, Mário Luiz Teixeira de; Paula, Rinaldo César de

doi:10.1007/s11056-019-09758-1

Cited by 12 publications

(9 citation statements)

References 28 publications

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“…Luo et al (2014) presented heritability estimates of Lepto tolerance in E. camaldulensis and E. tereticornis breeding populations in China of 0.54 and 0.52, respectively. da Silva et al (2020), also presented heritability estimated from multiple Eucalyptus species ranging from 0.27 to 0.68, with E. grandis at 0.58. These heritability estimates are similar to what we obtained in our study at 0.54 for E. grandis (Table 2).…”

Section: Genetic Parameters For Diameter Growth and Lepto And Botryotera Tolerancementioning

confidence: 96%

“…The insect is native to Queensland, Australia, known as the Blue Gum Chalcid wasp (Hymenoptera: Eupholidea). It has spread across the globe, infesting a wide range of commercially grown Eucalyptus species and their hybrids, resulting in severe losses in young plantations and nursery seedlings (Mendel et al, 2004;Nyeko et al, 2010;Chang et al, 2012;da Silva et al, 2020). First reported in the Mediterranean Basin and the Middle East in 2000 (Viggiani et al, 2000;Mendel et al, 2004), L. invasa subsequently spread throughout countries in Africa, America, and Asia (Nyeko, 2005;Wiley and Skelly, 2008;Prabhu, 2010;Zhu et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Genomic Breeding for Diameter Growth and Tolerance to Leptocybe Gall Wasp and Botryosphaeria/Teratosphaeria Fungal Disease Complex in Eucalyptus grandis

et al. 2021

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Eucalyptus grandis is one of the most important species for hardwood plantation forestry around the world. At present, its commercial deployment is in decline because of pests and pathogens such as Leptocybe invasa gall wasp (Lepto), and often co-occurring fungal stem diseases such as Botryosphaeria dothidea and Teratosphaeria zuluensis (BotryoTera). This study analyzed Lepto, BotryoTera, and stem diameter growth in an E. grandis multi-environmental, genetic trial. The study was established in three subtropical environments. Diameter growth and BotryoTera incidence scores were assessed on 3,334 trees, and Lepto incidence was assessed on 4,463 trees from 95 half-sib families. Using the Eucalyptus EUChip60K SNP chip, a subset of 964 trees from 93 half-sib families were genotyped with 14,347 informative SNP markers. We employed single-step genomic BLUP (ssGBLUP) to estimate genetic parameters in the genetic trial. Diameter and Lepto tolerance showed a positive genetic correlation (0.78), while BotryoTera tolerance had a negative genetic correlation with diameter growth (−0.38). The expected genetic gains for diameter growth and Lepto and BotryoTera tolerance were 12.4, 10, and −3.4%, respectively. We propose a genomic selection breeding strategy for E. grandis that addresses some of the present population structure problems.

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Section: Genetic Parameters For Diameter Growth and Lepto And Botryotera Tolerancementioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Genomic Breeding for Diameter Growth and Tolerance to Leptocybe Gall Wasp and Botryosphaeria/Teratosphaeria Fungal Disease Complex in Eucalyptus grandis

et al. 2021

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“…The existence of native and exotic parasitoids in planted Eucalyptus forests, as well as the introduction of exotic parasitoids, have shown promise for the biological control of Leptocybe spp 10–14 . However, the most effective control method widely used in commercial Eucalyptus planting areas is the use of resistant genotypes 15 . These genotypes come from species with less resistance to drought, 7 which is worrying in a climate change scenario 16 …”

Section: Introductionmentioning

confidence: 99%

Differential development times of galls induced by Leptocybe invasa (Hymenoptera: Eulophidae) reveal differences in susceptibility between two Eucalyptus clones

Sarmento

Pinto

Araújo

et al. 2020

Pest Management Science

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BACKGROUND The significance of morphological responses of hosts on susceptibility against gall‐inducing insects is relatively unknown, especially in planted forests. Here, we investigate the temporal morphological responses (gall development) induced by the invasive gall wasp Leptocybe invasa and the subsequent insect development in two Eucalyptus clones. RESULTS Our results identified a novel stage of gall development, not previously reported, termed here ‘brownish ring’. In both hosts similar gall development stages were observed. Although L. invasa oviposited in both clones, comparison of external morphological traits of galls over time revealed a differential response in the number of galls between clones. Comparison of the developmental time of each gall and insect stage between clones suggests that plant defense mechanisms against L. invasa are activated shortly after oviposition by the wasp, yet before gall formation. CONCLUSION Gall number is an important parameter that should be used to measure host susceptibility among Eucalyptus clones. To the best of our knowledge, this is the first study showing differential morphological responses induced by a galling insect, even before gall formation, revealing differences in susceptibility between different plant hosts. These findings provide insight into the use of early stages of gall formation by L. invasa to prevent invasion and establishment of this pest.

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“…These diseases until now have been impossible to control by biological means (Nambiar et al 2018). The spread of the Australian gall wasp L. invasa was first detected in Israel in 2000 and quickly spread all over the world, showing up in Brazil in 2008 (Silva 2019). The very successful hybrid, K7, of E. camaldulensis x E. deglupta in Thailand, Laos and Vietnam (Ito 2009), later was abandoned due to its susceptibility to L. invasa.…”

Section: Dangers Associated With Short Rotation Plantations Of Eucalyptus Species and Hybrids In The Equatorial Regionsmentioning

confidence: 99%

“…Thaumastocoris peregrinus, Ophelimus gaskelli, Glycapsis brimblecombei and the Gonipterus spp. complex appeared in the last decades in Brazil (Silva 2019) and several continents and countries.…”

Section: Dangers Associated With Short Rotation Plantations Of Eucalyptus Species and Hybrids In The Equatorial Regionsmentioning

confidence: 99%

Eucalypts for Tropical Rainforest (Af) climate

Brune

2021

Silvae Genetica

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The equatorial region of the world includes areas of Tropical Rainforest (Af) and Tropical Monsoon (Am) climate zones, which are distinguished by high temperatures and high rainfall, but soils which are often deficient. Potential productivity of plantation forestry in this area is high, and so are the pest and disease dangers which threaten it. This paper describes the Eucalyptus and Corymbia species which are adapted to this situation and also resistant to the main diseases like leaf blights. Based on the highly adapted E. biterranea and E. deglupta and several more, hybridization combined with vegetative propagation is discussed as an excellent alternative to obtain quick gains in short rotations while maintaining wide genetic diversity in such plantations. Management remedies are given for the possible backlash of quick soil depletion.

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Susceptibility of eucalypt taxa to a natural infestation by Leptocybe invasa

Cited by 12 publications

References 28 publications

Genomic Breeding for Diameter Growth and Tolerance to Leptocybe Gall Wasp and Botryosphaeria/Teratosphaeria Fungal Disease Complex in Eucalyptus grandis

Genomic Breeding for Diameter Growth and Tolerance to Leptocybe Gall Wasp and Botryosphaeria/Teratosphaeria Fungal Disease Complex in Eucalyptus grandis

Differential development times of galls induced by Leptocybe invasa (Hymenoptera: Eulophidae) reveal differences in susceptibility between two Eucalyptus clones

Eucalypts for Tropical Rainforest (Af) climate

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