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- W1976501425 abstract "Abstract The life‐history of Phthorimaea operculella was observed on potato tubers in laboratory. The incubation period for eggs was 2.3–7.2 days, while larval development period was 6.2–29.5 days, and that for the pupal development was 4.1–12.6 days. The pre‐oviposition period ranged between 1.6 and 7.9 days. The generations varied in duration from 17.5 days (summer) to 57.2 days (winter). Eight generations developed between November 22, 1973 and July 29, 1974, while the ninth generation failed to proceed beyond the larval stage. Mortality of eggs and pupae was almost zero, and that of larvae was 12.8–100%, while that of adults was not determined. Sex ratio was almost 1:1. Temperature extremes of 4 and 36° C proved to be lethal to all stages. Zusammenfassung Beobachtungen über die Biologie der Kartoflelmotte Phthorimaea operculella Zell. (Lepidoptera, Gelechiidae) im Irak Es wurde die Lebensweise der Kartoffelmotte während 8 Generationen in einem Jahr an Kartoffeln im Labor untersucht. Es variierten: die Eientwicklung zwischen 2,3 und 7,2 Tage, die Larvenentwicklung zwischen 6,2 und 29,5 Tage, die Puppenentwicklung zwischen 4,1 und 12,6 Tagen, die Praeovipositionsperiode zwischen 1,6 und 7,9 Tagen und die Gesamtentwicklungszeit einer Generation zwischen 17,5 Tagen (im Sommer) und 57,2 Tagen (im Winter). Zwischen dem 22. 11. 1973 und dem 29. 7. 1974 entwickelten sich 8 Generationen, während die 9. Generation danach in Larvendiapause fiel. Die Mortalität der Eier und Puppen war gleich Null, die der Larven betrug 12,8 bis 100%. Das Geschlechterverhältnis war ausgeglichen. Unterhalb 4° und oberhalb 36° C starben alle Stadien ab." @default.
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- W1976501425 date "1975-01-12" @default.
- W1976501425 modified "2023-10-10" @default.
- W1976501425 title "Observations on the biology of the potato tuber moth Phthorimaea operculella Zell. (Lepidoptera, Gelechiidae) in Iraq1" @default.
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- W1976501425 doi "https://doi.org/10.1111/j.1439-0418.1975.tb02354.x" @default.
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