The Controlling Of Ash Whiteflies Siphoninus Phillyreae (Haliday) (Hemiptera : Aleurodidae By Metarhizium Anisopliae In The Field

Abstract

This experiment was conducted in the Agriculture College fields for the Autumn season 2019 with the aim of examining the M. anisopliae effect on the mortality ratios of the whitefly S. phillyreae stages (eggs, instar2nd and pupae), where the mortality rates for the tested fungal isolates varied (4.8x101, 4.8x10 2 and 4.8x104) which also varied according to their used concentrations and the time periods following the treatment. As the mortality rates gradually increased, the concentration increased or the lengthy period after its use increased. The fungus M. anisopliae achieved mortality rates for eggs, instar2nd and the pupae, respectively, and the highest mortality rate was at concentration 4.8x104spor / ml of 3.66, 5.66 and 4.66% after a week of treatment, respectively, and then the mortality rates continued, and the mortality rates reached (33.3 and 1.33), (2.33 and 1.33) and (2.66 and 1.66)% after 14 and 21 days of treatment, respectively, and achieving 1.66, 0.66 and 0.33 %mortality rate after four weeks of treatment, to infect the fungus with all tested insect stages, respectively.