Population Density of Potato Tuber Moth, Phthoremaea operculella (Zeller) Lepidoptera : Gelechidae ) Infesting Potato Plants In The Field.

Abstract

was higher on sandy soil (518 individuals / 120 leaves) than the clay soil (332 individual / 120 leaves), These results revealed significant positive effects of maximum and minimum temperature and DP on population density of P. operculella during the first season 2014 in clay soil and sand soil. The combined effect (E.V) of these ecological factors on P. operculella showed that these factors were responsible as a group for 84 %, 15% and 35 % effects on the population density of P. operculella throughout seasons (2014, 2015 and 2016) in clay and sandy soil , also, these factors were responsible as a group for 72 %, 64% and 26 % effects on the population density.