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Versuche zur Bekämpfung der Kartoffelmotte,Phthorimaea operculella (Zell.) (Lep., Gelechiidae) mit chemischen und natürlichen Insektiziden in der Republik Yemen

  • O. M. Nasseh
  • M. A. Al Furassy
Article

Zusammenfassung

In Laborexperimenten wurden Drittlarven vonPhthorimaea operculella mit Sumithion (Fenithrothion 40EC, 10ml/10l) sowie mit Pflanzenextrakten vonMelia azedarach undAllium sativum (je 100g//10l) topikal behandelt. Nach wenigen Tagen zeigte Sumithion 100%, die beiden Extrakte aber noch weniger als 20% Mortalität. Nach 5 Wochen betrug die Gesamtsterblichkeit (gemessen an normal geschlüpften Faltern) beiMelia =91,7% und beiAllium=83%, wobei es unter dem Einfluß der Pflanzenextrakte zu Entwicklungsstörungen sowie Verpuppungs-und Mottenschlüpfstörungen kam. Mit der Anwendung dieser umweltschonenden Wirkstoffe eröffnet sich in der Republik Yemen ein neuer Weg der Kartoffelmotten-Bekämpfung.

Studies on control of potato tuber moth larvae,Phthorimaea operculella (Zell.) (Lep., Gelechiidae) by natural and chemical insecticides in the Republic of Yemen

Abstract

The potato tuber moth,Phthorimaea operculella, (Zell.), is recognized as the most serious and destructive pest of the potato in the Republic of Yemen. Its larva mines the aerial parts of the potato plant, the subterranean and the stored tuber. Laboratory studies were done at 26±1°C, under natural humidity (45±5%) and with 12h of light and 12h of darkness. Sumithion (Fenitrothion, 40 EC) at the rate of 10 ml/10 l, as a standard insecticide and aqueous extracts of the outer pulp ofMelia azedarach L. andAllium sativum L. at the rate of 100g/10l were used for the control of potato tuber moth larvae. Separate batches of 30 third-instar larvae were treated. The control batches were treated with plain water. Mortality was assessed after 24 h and later at daily interval until the emergence of the moth. The applied chemical and natural insecticides were considerably effective. The mortality amounted to: Sumithion =100%,M. azedarach =91.7% andA. sativum =85%.

In regard of controlling the potato tuber moth the results show the possibility of killing the pest by help of natural insecticides instead of environment-damaging chemical insecticides in the Republic of Yemen.

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Literaturverzeichnis

  1. Nasseh, O. M.;Furassy, M. A. 1989: Mass-production and utilization ofCopidosoma koehleri Blanch. (Encyrtidae-Hymenopt.) to controlPhthorimaea operculella Zeller (Gelechidae-Lep.) in the Republic of Yemen. Proceed., Integ. Pest Managem., DLG, Vol. II, 663–668.Google Scholar
  2. Nasseh, O. M.; Abdul Mughni, A., 1984: Research in Banana Fruit Spotting Disease in the Republic of Yemen. GTZ-Report, 57 pp., 28 colour photographs. Mimeographed.Google Scholar
  3. Ruscoe, C. N. E., 1972: Growth disruption effects of an insect antifeedant. Nature, New Biol.236, 159–160.Google Scholar
  4. Schmutterer, H.;Rembold, H., 1989: Zur Wirkung einiger Reinfraktionen aus Samen vonAzadirachta indica auf Fraß-aktivität und Metamorphose vonEpilachna varivestis (Col.-Coccinellidae). Z. angew. Ent.89, 179–188.Google Scholar
  5. Warthen, J. D., jr., 1979:Azadirachta indica: a source of insect feeding inhibitors and growth regulators. Agr. Rev. Man. ARM-NE. 4.Google Scholar

Copyright information

© Verlag Paul Parey 1992

Authors and Affiliations

  • O. M. Nasseh
    • 1
  • M. A. Al Furassy
    • 1
  1. 1.Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ)Eschborn

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