Scientific Investigation on the Efficacy of Isolated Nomuraea rileyi and Spinosad against Corn Pests under Laboratory and Field Conditions in Egypt

Sabbour, Magda Mahmoud Amin (2020) Scientific Investigation on the Efficacy of Isolated Nomuraea rileyi and Spinosad against Corn Pests under Laboratory and Field Conditions in Egypt. In: New Perspectives in Agriculture and Crop Science Vol. 2. B P International, pp. 108-116. ISBN 978-93-89816-43-3

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Abstract

The entomopathogenic fungus, Nomuraea rileyi and commercial BT spinosad were tested on some
corn pests: Ostrinia nubilalis, Chilo agamemnon and Sesamia cretica under laboratory and field
conditions. Results showed that the N. rileyi LC50 of O. nubilalis, C. agamemnon and S. cretica, 124,
146 and 159 conidia/ml under laboratory conditions. The corresponding figure for Spinosad was 166,
179 and 185 microgram/ ml (μg/ml. Under field conditions, results showed that during the season
2011, percentage of O. nubilalis, S. cretica and C. agamemnon infestations were significantly
decreased in plots treated with N. rileyi to 25±3.2, 21±2.4 and 24±2.3 individuals after 120 days after
the first application as compared to 97±3.3 in the control. When spinosad was applied in the field, the
percentage of infestations was significantly decreased to 26±3.3 as compared to 99±1.3 individuals in
the control during both seasons. During the harvest season, the corn weight was significantly
increased to 3822±45.6 and 3940±60.4 kg/Feddan (Feddan=2400m2) in the plots treated with the
fungus N. rileyi as compared to 2810±40.9 and 2710±73.2 Kg/Feddan in the control plots. Among
plots treated with spinosad the yield significantly increased to 3000±60.7 and 3129±84.1 kg/Feddan
during season 2011 and 2012, respectively.

Item Type: Book Section
Subjects: OA Open Library > Agricultural and Food Science
Depositing User: Unnamed user with email support@oaopenlibrary.com
Date Deposited: 24 Nov 2023 06:12
Last Modified: 24 Nov 2023 06:12
URI: http://archive.sdpublishers.com/id/eprint/2171

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