Foliage maturity of Quercus ilex affects the larval development of a Croatian coastal population of Lymantria dispar (Lepidoptera: Erebidae)

Open Life Sciences

Pernek Milan¹  Lukić Ivan¹  Lacković Nikola¹  Mrmić Sanja²  Schafellner Christa³  Lakatos Ferenc⁴ 

[1] Division for Forest Protection and Game Management, Croatian Forest Research Institute, Jastrebarsko 10450, Croatia;Division for Genetics, Forest Tree Breeding and Seed Husbandry, Croatian Forest Research Institute, Jastrebarsko 10450, Croatia;Institute of Forest Entomology, Forest Pathology and Forest Protection, Universität für Bodenkultur Wien, Wien 1190, Austria;Institute of Forest and Wood Protection, University of West Hungary, Sopron H-9400, Hungary;

关键词: gypsy moth;    holm oak;    defoliation;    outbreak;    host plant;   

DOI  :  10.1515/biol-2017-0002

来源: DOAJ

【 摘 要 】

Gypsy moth (Lymantria dispar) is one of the most important forest pests in the world. Numerous previous studies focused only on different host tree species, but small number of them on foliage age. Since recent genetic analyses showed that there are significant differences between Croatian continental and coastal population we investigated coastal population since there was no previous research. For this research juvenile and mature foliage of Holm oak (Quercus ilex) was used. Larval development was investigated in two laboratory experiments. One experiment involved rearing trials consisting of 50 individual larvae per treatment while a parallel experiment investigated gregarious feeding conditions using 120 larvae in a rearing treatment. Larval mortality was lower and development time shorter for individuals reared on juvenile foliage. High pupation success in both the individual and group rearing experiment for larvae reared on juvenile foliage was also observed. To conclude, our results showed high mortality, poor larval development and low pupation success in larvae reared on mature foliage. This research is significant because in the aspect of ongoing climate changes there is a possibility that gypsy moth will move to the north and shift its distribution by expanding into new climatic area.

【 授权许可】

Unknown