Life history and demography ofPsyllaephagus zdeneki(Hymenoptera: Encyrtidae), a potential candidate for biological control of olive psylla,Euphyllura pakistanica(Hemiptera: Psyllidae)

Abstract

Life history and demographic parameters of Psyllaephagus zdeneki Noyes and Fallahzadeh (Hymenoptera: Encyrtidae) were studied on its host the olive psyllid, Euphyllura pakistanica Loginova (Hemiptera: Psyllidae). Experiments were conducted in a growth chamber at 20918C, relative humidity of 6095%, and a photoperiod of 16:8 (L: D) hours. Four different olive cultivars (Fishomi, Shenge, Oil and Yellow) were used to test possible host plant influence on parasitoid performance. The pre-imaginal developmental period of female P. zdeneki varied from 24.96 (on Fishomi) to 26.34 (on Shenge) days, and for males from 21.63 (on Fishomi) to 24.44 (on Yellow) days. Adult female longevity differed significantly among the four cultivars, ranging from 12.46 (on Fishomi) to 14.97 (on Shenge) days. For each cultivar, adult female longevity was significantly greater than male longevity. Life table parameters showed survival rates (l x ) in newly emerged females were 84.61, 82.25, 85.71 and 78.12% on Fishomi, Yellow, Shenge and Oil, respectively. Female egg deposition was highest on Yellow (138.4 eggs per female) and lowest on Fishomi (116.3 eggs per female). The highest and lowest intrinsic rate of increase were 0.28 (on Shenge) and 0.24 (on Oil), respectively. The mean generation time ranged from 14.6 (on Shenge) to 16.7 (on Oil) days. These results are discussed with respect to the potential impact P. zdeneki as a natural enemy of E. pakistanica, the most important pest of olive in the Fars province of Iran, as well as the influence of olive cultivar on parasitoid life table parameters.

The role of phenolic compounds on abundance of olive psyllid, Euphyllura straminea Loginova on commercial and promising olive cultivars

“…They pointed out the determining role of botanical and pomological characteristics, volatile chemical compounds in the fruit, as well as agronomic factors such as plowing and fertilizing in the sensitivity and resistance of olive cultivars to olive fruit y. Asadi et al (2011) determined the development, reproduction, and growth population parameters of the olive psyllid, Euphyllura pakistanica Loginova (Hemiptera; Psyllidae) on four olive cultivars; Fishomi, Roghani, Zard, and Shengeh under controlled laboratory conditions. Their ndings showed that the development and demographic parameters of olive psyllid E. pakistanica were in uenced by cultivars variety.…”

Geographical Distribution Studies on common pistachio psylla, Agonoscena pistaciae Burckhardt and Lauterer (Hem.: Aphalaridae) in Iran

“…The pest produces large amounts of honeydew which absorb dust and microorganisms, thus preventing photosynthesis (Porkhosravani et al 2020;Sheibani and Hassani 2014). Chemical control is used more than other methods that addition to the high costs, effect on environment, human health and natural enemies (Asadi et al 2009); therefore, it must be replaced with another approach such as integrated and ecological controls. A. pistaciae could be found in locations with an altitude range of 900-2150 m throughout the country (Ahmadi et al 2013) and nearly everywhere the pistachio trees are found.…”