Open AccessStudies on the occurrence of true spiders as natural enemies in many Egyptian fields
Author(s) -
Amira A. Ibrahim,
Souad A. Shairra,
Iman F. S. Elmahdi
Publication year - 2012
Publication title -
journal of basic and applied zoology /journal of basic and applied zoology
Language(s) - English
Resource type - Journals
eISSN - 2090-9896
pISSN - 2090-990X
DOI - 10.1016/j.jobaz.2011.10.001
Subject(s) - phthorimaea operculella , biology , larva , spider , predation , natural enemies , toxicology , zoology , ecology , gelechiidae
True spiders represent one of the most important natural predatory species in Egyptian fields. In this work, common true spiders were surveyed in wheat, cotton and maize fields, and were counted weekly by using the direct method. For evaluating the feeding consumption of true spiders, five feeding cases were tested (as preys). These cases were: eggs of Ephestia kuehniella, eggs of Phthorimaea operculella, one day eggs and larvae of E. kuehniella, larvae of E. kuehniella and P. operculella and larvae of E. kuehniella only. Results obtained revealed that, the highest average daily consumption for each spider was recorded in case of feeding on eggs of P. operculella. While, the longest survival period was recorded in case of feeding on larvae of E. kuehniella