Population Dynamics of Saissetia oleae (Olivier) (Hemiptera: Coccidae) on Olives

Abstract

A preliminary study on fluctuation of black scale, Saissetia oleae (Olivier) (Hemiptera: Coccidae), was carried out in Algeria in order to assess population dynamics and infestation incidence on olive groves. Monitoring was conducted in two years (2014)(2015) in three localities in North Algeria. The density of populations has varied from year to year and from region to region. Populations peaked in June, when crawlers emerged after the egg-laying period, and decreased during several months. Additionally, S. oleae can be considered a risky pest of olive groves in Algeria. Therefore, further studies on population dynamics are necessary for a better understanding of its biology in this Algeria.

Physiological Aspects of Olea europaea (Oleaceae) Attacked by Saissetia oleae (Hemiptera: Coccidae)

“…Herbivory can trigger the production of phenolic compounds protecting plants, and cultivars with lower production of these compounds could be detected and preferred by insects. Higher densities of S. oleae population during the summer in the cultivars Grappolo, Ascolano, and Koroneiki may be correlated with increased precipitation, humidity, and temperature as found for S. oleae in Algeria (Ilias & Hammadi 2017) and Spain (Tena et al 2007) where the population peak reached its maximum in summer. The hotter and more humid summer in Brazil can favor the population increase of S. oleae on O. europaea cultivars.…”

“…Saissetia oleae (Oliver) (Hemiptera: Coccidae) is an important pest in the world and abundant in olive plantations (Ilias & Hammadi 2017). The nymphs and adult females of this insect suck the sap of branches and leaves and can cause direct damage at all stages of plant development and indirect by excreting honeydew.…”

Population Dynamic of Olive Black Scale, Saissetia oleae (Olivier) (Hemiptera: Coccidae) Infesting Olive Trees in Irrigated Farms in Matrouh Governorate, Egypt

“…In Algeria, Ilias and Hammadi (2017) reported that the density of Saissetia oleae populations has varied from year to year and from region to region. Populations peaked in June, when crawlers emerged after the egglaying period, and decreased during several months.…”