Effect of thiacloprid against the potato tuber moth Phthorimaea operculella Zeller (Lepidoptera: Gelechiidae) |
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Authors: | G Saour |
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Institution: | (1) Department of Biotechnology, Atomic Energy Commission of Syria, P. O. Box 6091, Damascus, Syria |
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Abstract: | The effect of the chloronicotinyl insecticide (thiacloprid 480 SC) was evaluated to determine its potential in controlling
the potato tuber moth, Phthorimaea operculella. Application of thiacloprid at various concentrations (0.1–0.4 ml/l) on different age groups of eggs (1–4.5 day-old) had
no effect on egg hatchability. However, slight embryocidal effect was noted in all egg age groups exposed to 0.4 ml/l concentration.
Egg incubation period was increased (20%) when 4–4.5 day-old eggs were treated with thiacloprid at a rate of 0.4 ml/l compared
with the untreated control. Thiacloprid was effective in reducing larval survival on potato seedlings or adults emergence
from potatoes, exhibiting activity for at least 14 days after application. When already infected potato seedlings or tubers
were treated with thiacloprid at a rate of 0.4 ml/l, adult emergence was decreased. Larvae that hatched from thiacloprid-treated
eggs and fed, untreated tubers, encountered some difficulties in surviving and emerging as adults. Our data suggest that potato
plants or tubers treated with thiacloprid at a commonly used rate (0.4 ml/l) should be well protected from the possibility
of infestations by the potato tuber moth.
Publication of this article was held up owing to technical problems. The publisher apologizes sincerely for this lengthy delay. |
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Keywords: | Phthorimaea operculella Thiacloprid Chloronicotinyl insecticide Potatoes |
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