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Qualitative and quantitative survey on the oophagous wasps attacking the Pink Borer, Sesamia cretica Led. (Lep., Noctuidae) on 3 gramineous crops in Upper Egypt
Author(s) -
Temerak S. A.,
Temerak S. A.
Publication year - 1981
Publication title -
zeitschrift für angewandte entomologie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 60
eISSN - 1439-0418
pISSN - 0044-2240
DOI - 10.1111/j.1439-0418.1981.tb04495.x
Subject(s) - noctuidae , sorghum , biology , parasitoid , lepidoptera genitalia , agronomy , botany , biological pest control
Field studies were undertaken to recognize and evaluate the relative role of the possible egg parasitoids attacking the pink borer, Sesamia cretica Lederer on 3 gramineous (sugarcane, sorghum and corn) crops at the University farm of Assiut in 1978 and 1979. One Scelionid, Telenomus sp. and 2 Trichogrammatids, Paracentrobia sp. and P. dimorpha (Kryger) were emerged from S. cretica eggs. The Trichogrammatid parasitoids were only recorded from few egg masses on sorghum and considered as first records in Egypt. The Scelionid, Telenomus sp. was the most dominant parasitoid on the 3 crops. Parasitism (%), estimated by different routes, did not significantly differ on the 3 crops. The Scelionid was actually reached to more than of 65% of the egg masses on each of the 3 crops (during May) in the 2 years. After successful host acceptance, this parasitoid mostly tends to parasitize every egg in the respective egg mass resulting in “completely parasitized egg mass” on the 3 crops. The later was quantified and reported in more than 69% and 78% of the cases of 1978 and 1979, respectively. Size of egg mass (no. of eggs/mass) was significantly larger on sugarcane than both sorghum and corn plants. Sesamia moths were significantly showed “ovipositional preference” to sorghum than both sugarcane and corn stalks. Zusammenfassung Qualitative und quantitative Untersuchungen über Schlupfwespen als Eiparasiten von Sesamia cretica Led. (Lepid., Noctuidae) an drei Gramineen‐Arten in Unterägypten Bei Freilanduntersuchungen 1978/79 auf der Univ.‐Farm von Assiut wurden eine Scelionide, Telenomus sp., und 2 Trichogrammatiden, Paracentrobia sp. und P. dimorpha (Kryger) als Eiparasiten von Sesamia cretica festgestellt. Die Trichogrammatiden wurden nur aus Eiablagen an Sorghum gezogen und bilden den ersten Nachweis der beiden Arten in Ägypten. Die Scelionide war der dominanteste Parasit an den 3 Fraßpflanzen, zwischen welchen die Parasitierungsquote nicht signifikant differierte. Die Scelionide parasitierte mehr als 65% der Eiablagen an jeder der 3 Pflanzenarten. Nach der Annahme einer Eiablage tendierte diese Schlupfwespe dazu, alle Eier der Ablage zu parasitieren. 100% ig parasitierte Eiablagen der Eule wurden an den 3 Pflanzenarten in rund 69% (1978) und 78% (1979) festgestellt. Die Zahl der Eier pro Ablage der Eule war an Zuckerrohr signifikant größer als an Sorghum oder Getreide. Dagegen zeigten die Sesamia ‐Falter eine gesicherte Eiablage‐Präferenz für Sorghum.

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