STUDIES ON POME-FRUIT TREES INSECTS IN A.R.E. 5-POPULATION FLUCTUATIONS OF THE PUBESCENT ROSE CHAFER TROP1NOTA SQUALIDA SCOP. (COLEOPTERA: SCARABAEIDAE) ON APPLE AND PEAR TREES

TADROS, ANTON W.; EL-SHERIF, SAMER I.; FATTOUH, ABDEL-HAMED A.

doi:10.21608/ejar.2001.319952

STUDIES ON POME-FRUIT TREES INSECTS IN A.R.E. 5-POPULATION FLUCTUATIONS OF THE PUBESCENT ROSE CHAFER TROP1NOTA SQUALIDA SCOP. (COLEOPTERA: SCARABAEIDAE) ON APPLE AND PEAR TREES

Document Type : Original Article

Authors

¹ Plant Protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt

² Department of Economic Entomology and Pesticides, Faculty of Agriculture, Cairo University, Giza, Egypt

10.21608/ejar.2001.319952

Abstract

Population fluctuations of Tropinota squalida Scop. adults(Coleoptera: Scarabaeidae) in apple and pear orchards were investigated at Oseim (Giza Govemorate) in 1994 and 1995 .Beetles attacked flowers throughout spring between late February and late April having only one annual generation with a single peak (11.9-16.4 beetles/tree) by early April infestation was relatively higher on pear than on apple. Beetles were active during day-time especially on sunny warm early spring days. For both years of investigation, the effect of temperature on T.squalida population was insignificantly positive, while that of relative humidity was insignificantly negative.