Biology and ecology of Asphondylia coridothymi (Diptera: Cecidomyiidae) inducing galls on Coridothymus capitatus on the island Samos, Greece.
| Autor: | Malagaris, Polycarpos |
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| Jazyk: | angličtina |
| Předmět: |
dvoukřídlí
bejlomorkovití ekologie hálky symbiotické houby úmrtnost Diptera gall midges ecology galls (botany) symbiotic mushrooms mortality články journal articles životní cyklus interakce rostlina-hmyz parazitní Hymenoptera poškození Cecidomyiidae Asphondylia coridothymi Coridothymus capitatus life cycle plant-insect interactions damage new pest parasitic Hymenoptera |
| Druh dokumentu: | Non-fiction |
| ISSN: | 1211-376X |
| Abstrakt: | Abstract: Asphondylia coridothymi Skuhravá, 2011 galls the flower buds of Coridothymus capitatus (L.) (Reichenb.) (Lamiaceae). Only one generation develops per year. Adults emerge from mid March to mid June. Females usually lay one egg in a flower bud in which the larva develops. Adult life is very short, at most five days. Larvae develop in galls from June to October. Pupae hibernate in galls until spring the following year. Mycelium of a symbiotic fungus of the genus Aureobasidium (Basidiomycetes) covers the internal walls of the gall chamber. Seven species of parasitic Hymenoptera, belonging to five families of the superfamily Chalcidoidea, were recorded emerging from galls of this gall midge: Systasis encyrtoides Walker, 1834 (Pteromalidae), Aprostocetus sp., Tetrastichus sp., one unidentified species of the subfamily Tetrastichinae (Eulophidae), Ormyrus sp. (Ormyridae), Eupelmus sp. (Eupelmidae) and Eurytoma sp. (Eurytomidae). These parasitoids attack and kill gall midge larvae in galls. The percentage mortality of larvae of Asphondylia coridothymi in galls caused by unfavourable climatic conditions is 23.3% in semi-mountainous and 37.6% in lowland regions. Asphondylia coridothymi by galling the flower buds of Coridothymus capitatus prevents the development of seed and cause other flowers in galled inflorencesces to be infertile. Based on the reduction in seed production due to galling Asphondylia coridothymi is an important pest of Coridothymus capitatus. The damage it causes in lowland regions measured in terms of inflorescences bearing galls is from 3.3 to 6% and in semi-mountainous regions from 19 to 30%, which in terms of reduction in the quantity of seed produced by Coridothymus capitatus is 0.46 to 3.28% in lowland regions and 17.67 to 25.28% in semi-mountainous regions. |
| Databáze: | Katalog Knihovny AV ČR |
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