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Egyptian Journal of Agricultural Research
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GHABBOUR, S., HUSSEIN, A., EL-HENNAWY, H. (1999). SPIDER POPULATIONS ASSOCIATED WITH DIFFERENT CROPS IN MENOUFIYA GOVERNORATE, NILE DELTA, EGYPT. Egyptian Journal of Agricultural Research, 77(3), 1163-1179. doi: 10.21608/ejar.1999.337028
SAMER I. GHABBOUR; ABDEL-KHALEK M. HUSSEIN; HISHAM K. EL-HENNAWY. "SPIDER POPULATIONS ASSOCIATED WITH DIFFERENT CROPS IN MENOUFIYA GOVERNORATE, NILE DELTA, EGYPT". Egyptian Journal of Agricultural Research, 77, 3, 1999, 1163-1179. doi: 10.21608/ejar.1999.337028
GHABBOUR, S., HUSSEIN, A., EL-HENNAWY, H. (1999). 'SPIDER POPULATIONS ASSOCIATED WITH DIFFERENT CROPS IN MENOUFIYA GOVERNORATE, NILE DELTA, EGYPT', Egyptian Journal of Agricultural Research, 77(3), pp. 1163-1179. doi: 10.21608/ejar.1999.337028
GHABBOUR, S., HUSSEIN, A., EL-HENNAWY, H. SPIDER POPULATIONS ASSOCIATED WITH DIFFERENT CROPS IN MENOUFIYA GOVERNORATE, NILE DELTA, EGYPT. Egyptian Journal of Agricultural Research, 1999; 77(3): 1163-1179. doi: 10.21608/ejar.1999.337028

SPIDER POPULATIONS ASSOCIATED WITH DIFFERENT CROPS IN MENOUFIYA GOVERNORATE, NILE DELTA, EGYPT

Article 17, Volume 77, Issue 3, September 1999, Page 1163-1179  XML PDF (3.8 MB)
Document Type: Original Article
DOI: 10.21608/ejar.1999.337028
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Authors
SAMER I. GHABBOUR1; ABDEL-KHALEK M. HUSSEIN2; HISHAM K. EL-HENNAWY3
1Department of Natural Resources, Institute of African Research and Studies, Cairo University, Giza, Egypt
2Plant protection Research institute, Agricultural Research Centre, Dokki, Giza, Egypt
341, El-Manteqa El-Rabia St, Heliopolis, Cairo 71341, Egypt
Abstract
A survey on spiders in 18 different agricultural crops in the southern Nile Delta was carried out in 1996, by the pitfall trap method, expressed as "activity density". In summer crops, density of spider indi­viduals was 2.28 ± 1.29 per trap, compared with 2.38 ± 1.69 in winter crops. Highest densities in summer crops were in tomato, eggplant, and cucurbit cultivations, while in winter occurred in caraway, cabbage and onion cultivations. Sweet potatoes had the lowest density. Densities in spring varied from 0.4/trap in taro to 6.55/trap in caraway cultivations. It appears that plants with a dense foliage covering the ground (sweet potatoes and taro), constrain the movement of roaming spiders. Ten spider families were recorded in winter crops compared to 12 in sum­mer. Lycosidae was dominant in both seasons, constituting about 80%, followed by Linyphiidae, Philodromidae, Gnaphosidae and Tetragnathidae. Males were trapped in higher numbers than females. Juveniles constitut­ed 23-26% of the trapped samples, while subadults were more abundant in winter. Female lycosids carrying eggsacs had two peaks; one in spring and one in summer, but none was observed in winter. Correspondence analysis has shown that Zelotes complex was more associated with cab­bage, and a group of Lycorma ferox, Thanatus albini, Dictynidae, and Clu­bionidae, with peas, while Engone dentipalpis, Philodromidae, Tetragnath­idae and Dysdera spp. were more associated with caraway. As for summer crops Prinengone vagans, Engone dentipalpis, Linyphiidae, Philo­dromidae and Salticidae were more associated with potato and soya bean crops, while Lycorma fetus, Thanatus albini, Zelotes complex and Trachzeiotes spp. were more associated with cotton.
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