| Titles |
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English :
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Proper Timing and Number of Releases of the Egg parasitoid, Trichogramma evanescens West. for Controlling the Cotton Bollworms in Egyptian Cotton Fields
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Arabic :
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التوقيت المناسب وعدد مرات إطلاق طفيل البيض Trichogramma evanescens West. لمكافحة ديدان اللوز في حقول القطن المصرية
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| Abstract |
Experimental trials to choose the proper timing and number of releases of the egg parasitoid, Trichogramrna evanescen.s West, for controlling the cotton bollworms; the pink bollworm, Pectinophera go.s.sypiella (Saund.) and the spiny bollworm, Earia.s inszrlana (Boisd.) in Egyptian cotton fields were carried out at three locations in middle of the Delta; Quesna and Berket El-Sabh districts, Menoufia Governorate and Zagazig district, Sharkia Governorate during the cotton season 2003. Two to four parasitoid releases were conducted during the flowering and boll formation growth stages. Generally, the parasitoid releases showed significant reductions in the percentages of bollworms' infestation comparing with the insecticidal application areas (the control) at the same working sites. The reduction ranged between 48.6 to 56.5 % and 16.4 to 21.7 % when the parasitoid was released early during the flowering stage and few weeks later during the boll formation growth stage, respectively. In the parasitoid release areas, number of insecticidal applications was reduced to almost the third and consequently, the costs were dropped by 29.3 to 36 %. Also, cotton boll weight averaged 3.14 and 2.82 gm in the T. evanescen,s release and insecticide treated areas, respectively.
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| Publication year |
2004
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| Pages |
15-19
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| Availability location |
معهد بحوث وقايه النباتات
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| Availability number |
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| Organization Name |
Plant Protection Research Institute (PPRI)
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| City |
القاهرة
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| serial title |
Egyptian Journal of Biological Pest Control
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| Author(s) from ARC |
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| Agris Categories |
Protection of plants - General aspects
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AGROVOC
TERMS |
Earias insulana.
Gossypium.
Parasitoids.
Pectinophora gossypiella.
Timing.
Trichogramma evanescens.
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| Publication Type |
Conference/Workshop
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