Document: GAM-3-61-2

Insect species in Egyptian clover and alfalfa as related to crop system at Kafr El-Sheikh, Egypt and Sebha, Libya .

GAMAL EL-MEZAYYEN, DRA.*

Agriculture Research Station, Kafr El-Sheikh, Egypt ¹

Abstract:
Species as pests, beneficial and visitor insects from the Egyptian clover (E.C.) and alfalfa were sampled by sweep net from one feddan during two successive seasons at Kafr El-Sheikh and Sebha. Results indicated that E.C. harbored 13, 8 and 6 species of either pests, beneficial or visitor insects, respectively, belonged to 22 families and 8 orders in Kafr El-Sheikh. Alfalfa was found to harbor 14, 11 and 5 species of pests, beneficial and visitor insects, respectively, from 26 families belonging to 11 orders. Diversity indices in relation to crop system were 2.28 and 3.10 for E.C. and alfalfa in Kafr El-Sheikh and Sebha, respectively. The relative abundance of species in each crop system was found to have an effect on diversity index values. In E.C. Hypera brunneipennis (Boh.), Paederus alfierii (Koch.) and Apis mellifera L. were recorded as dominant species in Kafr El-Sheikh. Each insect was represented by 80.90, 85.32 and 65.62% of pests, beneficial and visitor insects, respectively. In alfalfa, Aphis spp. and Coccinella spp. accounted for 46.99, and 80.82% for pests and beneficial species, respectively, in Sebha. It could be stated that each crop has dominant and subdominant species that differently affected the diversity in each crop system.

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This abstract is being presented at: 3:30 PM in session:
AGROECOLOGY