Phthorimaea operculella (Zeller, 1983), in the tobacco agro-ecosystem

Krsteska, Vesna and Stojanoski, P. (2012) Phthorimaea operculella (Zeller, 1983), in the tobacco agro-ecosystem. In: International Conference on BioScience: Biotechnology and Biodiversity The Forth Joint UNS – PSU, Novi Sad.

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Phthorimaea operculella Zeller, 1873 (Lepidoptera: Gellechiidae) is known as potato tuberworm or tobacco splitworm. It is an oligophagous pest. It bores into the leaves, shoots and stems of the plants, as well as root tubers, of the Solanaceae family: potato, tomato, tobacco, eggplant and non-crop hosts.
We observed P. operculella as pest in commercial tobacco fields in locality Varos near Prilep (2007-2011). In tobacco, larvae primarily act as leaf-miners which can cause economic loss.
Investigations were carried with 100 tobacco stalks, in three locations in Varos. Each plant was observed for mines and mine location. Each mine found was opened to determine if larvae were present or absent.
In investigated tobacco fields, 2 to 3 generations were observed based on larval infestation.
P. operculella infestation in tobacco starts on the lower leaves of tobacco plant, because they are closer to the oviposition site. Larvae have been observed on upper stalk leaves when populations are large.
Early mines on tobacco leaves can be easily mistaken for abiotic damage or chemical burn. Mines are more visible by the 3rd larval instar. Larvae create mines, removing photosynthetic tissue and leaving only the upper and lower epidermis, resulting in a “window-pane” appearance.
The attacked tobacco is breakable and unsuitable for fabrication.
Tobacco fields with a known history of P. operculella infestation should be avoided in rotation with non- host crops when possible.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Phthorimaea operculella, tobacco.
Subjects: Scientific Fields (Frascati) > Agricultural Sciences > Agriculture, forestry and fisheries
Divisions: Scientific Tobacco Institute
Depositing User: Ms Biljana Jordanoska
Date Deposited: 08 Oct 2016 21:33
Last Modified: 08 Oct 2016 21:33

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