Content Vol. 3 N 7, 2017

Pages 129 - 141

Biology and development cycle of Glycaspis brimblecombei Moore, 1964 (Hemiptera: Psyllidae) on 2 species of Eucalyptus: Eucalyptus camaldulensis and Eucalyptus grandis; Laila Messoudi, Noureddin Maatouf, Latifa Rohi, ; Inter. J. Acad. Stud.  3(7):(2017)129-141

Glycaspis brimblecombei Moore (Hemiptera, Psyllidae) or eucalyptus psylla was introduced in Morocco in June 2009. It was observed for the first time in the Gharb region. The biology of this species has never been clearly studied in Morocco. This work aims to evaluate the cycle of life of G. brimblecombei on two species of Eucalyptus: E. camaldulensis and E. grandis. One hundred eggs per Eucalyptus species were monitored under laboratory conditions, with ambient temperatures ranging from 25°C to 27°C. Daily observations were made under a binocular microscope to elucidate different phases of the developmental cycle of the species. The following biological parameters were noted: larval viability, adult longevity, fertility (number of eggs/female), sex ratio and total development cycle. Other morphological criteria were also studied under a binocular lens: size, color, number of antenna articles and wing blanks. The results of this study showed that larval development includes five instars which differ in morphological and morphometric characteristics. Both species E. camaldulensis and E. grandis are favorable for the development of G. brimblecombei. However, E. camaldulensis is considered the most susceptible to attacks by this pest because it allows better survival of the larvae and adults lifespan.

Key words:

Glycaspis brimblecombei, Biology, Development cycle, E. camaldulensis, E. grandis.

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