| Full text | |
| Author(s): |
Pereira, Jaqueline Magalhaes
[1]
;
Lopes Baldin, Edson Luiz
[2]
;
Soliman, Everton Pires
[3]
;
Wilcken, Carlos Frederico
[2]
Total Authors: 4
|
| Affiliation: | [1] Univ Fed Goias UFG, Goiania, Go - Brazil
[2] Univ Estadual Paulista UNESP, Botucatu, SP - Brazil
[3] Suzano Papel & Celulose, Itapetininga, SP - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | SCIENTIA FORESTALIS; v. 48, n. 127 SEP 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
The red gum lerp psyllid, Glycaspis brimblecombei Moore (Hemiptera: Aphalaridae), is considered one of the most important pests of Eucalyptus worldwide. Since its detection in Brazil in 2003, the insect has caused defoliation in forests, twig dieback and sooty mold. Several types of management were evaluated, but few studies focused on the search for resistant Eucalyptus species and hybrid clones. The present study aimed to assess the biological performance of G. brimblecombei on E. camaldulensis, E. urophylla, and E. grandis and on the hybrids E. grandis x E. camaldulensis (1277 and 3025), E. urophylla x E. camaldulensis (VM-01), and E. urophylla x E. grandis (C-219, H-13, GG-100 and I-144), in order to determine resistance mechanisms. Under laboratory conditions (T= 26 +/- 2 degrees C; RH = 60 +/- 10%; photoperiod = 12 h), psyllids on each of the ten Eucalyptus genotypes were evaluated daily until adult emergence. Genotypes C-219 and H-13 (E. urophylla x E. grandis) exhibited high levels of antibiosis and/or antixenosis (non-preference) resistance to G. brimblecombei, drastically reducing nymph viability (mortality > 80%). In turn, genotypes 3025 (E. grandis x E. camaldulensis) and E. camaldulensis were highly susceptible to the biological development of red gum lerp psyllids. Our results may contribute to genetic improvement programs aimed at obtain G. brimblecombei resistant Eucalyptus genotypes. (AU) | |