Glycaspis brimblecombei (Hemiptera: Psyllidae) attack patterns on different Eucalyptus genotypes

PeerJ

article

Juliana Tuller¹  Karla Nunes Oliveira²  Jhonathan Oliveira Silva³  Maurício Lopes de Faria⁴  Mario Marcos do Espírito-Santo²  José Eduardo Serrão⁵  José Cola Zanuncio⁵ 

[1] Departmento de Biologia, Setor de Ecologia e Conservação, Universidade Federal de Lavras;Pós-Graduação em Ecologia, Departamento de Biologia Geral, Universidade Federal de Viçosa;Colegiado de Ecologia, Universidade Federal do Vale do São Francisco;Departamento de Biologia Geral, Universidade Federal de Viçosa;Departamento de Entomologia/BIOAGRO, Universidade Federal de Viçosa

关键词: Hybrid eucalypt;    Biological control;    Psyllaephagus bliteus;    Red gum lerp psyllid;    Water stress;   

DOI  :  10.7717/peerj.3864

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

BackgroundThe red gum lerp psyllid, Glycaspis brimblecombei Moore (Hemiptera: Psyllidae), an eucalypt insect pest from Australia, was reported in Brazil in 2003. This study evaluated damage patterns of this pest on Eucalyptus camaldulensis Dehn (Myrtaceae) and its hybrids E. urophylla X E. camaldulensis (urocam) and E. urophylla X E. grandis (urograndis). In addition, parasitism rates of Psyllaephagus bliteus Riek (Hymenoptera: Encyrtidae) on G. brimblecombei collected on different eucalypt genotypes are reported.MethodsPlantation plots of three eucalypt genotypes were evaluated over one year. The eucalypt leaves were collected and examined for attack by G. brimblecombei. Nymph parasitism of G. brimblecombei by P. bliteus was recorded.ResultsDamage by G. brimblecombei was lower on the hybrid genotypes and on the adaxial surface of the eucalypt leaves. G. brimblecombei egg and nymph density were negatively correlated with monthly rainfall. Nymph parasitism of G. brimblecombei by P. bliteus was low (2.9%) independent of genotype and did not vary throughout the year.DiscussionOur data indicate the use of less susceptible eucalypt genotypes (e.g., hybrids) as an alternative to G. brimblecombei management. Because of the current low mortality rates for G. brimblecombei resulting from P. bliteus parasitism, biological control with this natural enemy is not recommended as a management strategy for G. brimblecombei.

【 授权许可】

CC BY