Title Survey of cereal aphids
and their natural enemies and effect of the predator Coccinella
septempunctata L. on biological suppression of cereal aphids in Al-Jabal
Al-Akhdar region, Libya.
Author(s) El-Aish,
H. S.; El-Ghariani,
I. M.; Al-Mabruk,
A. H. H.
Author Affiliation Plant
Protection Institute, Faculty of Agriculture, Omar AL-Mukhtar University, P.O.
Box 99 EL-Beida, Libya.
Journal article; Conference
paper Egyptian
Journal of Biological Pest
Control 2004 Vol. 14 No. 1 pp. 285-290
ISSN 1110-1768
Publisher information
Egyptian Society for Biological Control of Pests, Giza, Egypt
Language of Text Arabic
Language of Summary
English
Record Number
20053186489
Abstract
A study was conducted to survey and identify the cereal aphid species and
their natural enemies in Al-Jabal Al-Akhdar region, Libya. The results revealed
the presence of three species from cereal aphids: Rhopalosiphum padi,
Schizaphis graminum and Sitobion avenae. The aphid species showed
different appearance and distribution in different locations of the area of the
study. The following natural enemies were registered: the predators
Coccinella septempunctata and Chrysoperla carnea, and the
parasitoids Aphidius matricariae and Diaeretiella rapae. The study
on the efficiency of C. septempunctata for suppressing cereal aphids
showed that the durations for the egg lasted 2-3 days and 3, 2, 2 and 4 days for
1st, 2nd, 3rd and 4th instar larvae, respectively, and 8 days for the pupal
stage at the room temperature. In addition, the results proved that the predator
adult consumed 46.13 aphids, while the larva consumed 26.9 daily. The predation
efficiency of the predator C. septempunctata was significantly different
between larvae and adults.