International Journal of Entomology Research

Authors
M A Abdel-Raheem, Sanaa A M Abd El-Mageed, Samah M Y H

Abstract
Fiorinia fiornii, Cockerell & Robinson (Diaspididae: Hemiptera), is a significant pest of nursery plants, particularly of ornamental palms.Armored scale insects are difficult to control using traditional contact insecticides because they spend the majority of their life cycle in a relatively impervious wax cover. Combinations of oils and insecticides have been used effectively. Scale insects are particularly susceptible to biological control. This study was carried out to investigate the virulence of some Entomopathogenic Fungi for controlling the Fiorinia fiornii on date palm trees at Giza Governorate, Egypt during November, 2021; two compounds of Entomopathogenic Fungi, Biosect, Biover and Biosect + Silica gel (ratio 2:1 & 1:1) were tested. The obtained results showed that all tested Entomopathogenic Fungi were able to decrease the infestation with the F. fiornii on date palm trees. Percent mortality of nymphs was 79.6 % after 7th days, at the concentration (3.2 X 104 spores/ ml.) of Biover but after 7th days of infection of adults was 71.63 % with the same concentration. While percent mortality of nymphs was 83.7 % after 21st days, at the concentration (3.2 X 104 spores/ ml.) of Biover but after 21st days of infection of adults was 83.28 % with the same concentration. Percent mortality of nymphs was 80.7 % after 7th days, at the concentration (3.2 X 10 6 spores/ ml.) of Biosect but after 7th days of infection of adults was 78.00% with the same concentration. While percent mortality of nymphs was 84.3% after 21st days, at the concentration (3.2 X 10 6 spores/ ml.) of Biosect but after 21st days of infection of adults was 85.00 % with the same concentration. The aim of this study was to know the virulence of some entomopathogenic fungi against Fiorinia fiornii.