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Biological control of Pectinophora gossypiella (Saund.) and Earias insulana (Boisd.) ín Cotton fields at Dakahlia governorate, Egypt by augmentative releases of Trichogramma evanescens westwood
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Abstract: Field studies were conducted at Dakahlia Governorate, Egypt in 2004 and 2005 cotton seasons to evaluate the releases of Trichogramma wasps for pink bollworm, Pectinophora gossypiella (Saund.) and spiny bollworms Earias insulana (Boisd.) management in cotton. In the two seasons, six releases of Tríchogramma evanescens Westwood 10-15 days intervals were made into 999 and 600 feddan, respecíively. While, the recommended bollworms insecticide control program was applied at the control units. This recommended program suggested to use insecticide applications (insect growth regulators, organophosphoric and pyrethroid compounds) when infestation met or exceed the economic level (3%). The overall reduction of infestaíion with the two pests in Trichogramma units averaged 23.73 and 40%, since infestatíon averaged 1.35 & 1.44.0 ín these units and 1.77 & 2.4% in control units at the two seasons, respectively. Meanwhile, T. evanescens succeeded to maintain boll infestaíion below the economic level in 78 and 84% of the dissected boll samples in the two seasons, respectívely. The corresponding figures by insecticides were 67 and 56% in the íwo seasons, respectively.
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| Publication year |
2007
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| Pages |
2295-2306
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| Availability location |
معهد بحوث وقاية النباتات
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| Availability number |
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| Organization Name |
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| City |
المنصورة
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| serial title |
مجله جامعه المنصورة للعلوم الزراعية
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| ISSN |
1110-0346
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| Author(s) from ARC |
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| Agris Categories |
Pests of plants
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AGROVOC
TERMS |
Biological control.
Earias insulana.
Gossypium.
Insect growth regulators.
Pectinophora gossypiella.
Synthetic pyrethrins.
Trichogramma evanescens.
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| Publication Type |
Journal
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