FIELD STUDIES ON THE INSECT SPECIES ON TWO FORAGE CROPS, THE EGYPTIAN CLOVER IN EGYPT AND ALFALFA IN LIBYA | ||
| Egyptian Journal of Agricultural Research | ||
| Article 12, Volume 79, Issue 3, September 2001, Pages 923-934 PDF (3.73 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.2001.319956 | ||
| Author | ||
| GAMAL A. EL-MEZAYYEN | ||
| Plant Protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt | ||
| Abstract | ||
| Results indicated that the Egyptian clover harbored 13, 8 and 6 species of pests, beneficial and visitor insects, belong to 22 families and 8 orders at Kafr EI-Sheikh, Egypt. Alfalfa was found to harbor 14, 11 and 5 species in 26 families belong to 11 orders. Diversity indices as measured for each species and summed in relation to crop system were 2.28 and 3.10 for the clover and alfalfa at Kafr EI-Sheikh and Sebha, respectively. The relative abundance of species in each crop system had an effect on diversity index values. In clover, Hypera brunneipennis (Boh.), Paederus alfierii (Koch.) and Apis militate L. were the dominant species at Kafr EI-Sheikh. Each insect population represented by 80.90. 85.32 and 65.62% of pests, beneficial and visitor insects, respectively. In alfalfa, aphids (different species) and Coccinella spp. accounted for 48.56 and 80.82% for pests and beneficial species, respectively, at Sebha. It could be stated that each crop has dominant and subdominant species which differently affected population diversity. | ||
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