Abstract
The olive psyllid Euphyllura olivina Costa (Homoptera, Psyllidae) causes considerable damage in olive groves in the Mediterranean basin, there by affecting production. To assess the rate of infestation and provide elements of integrated pest management, we monitored the life cycle and bio–ecology of this pest through population counts on the leaves and twigs of the tree from 29 March 2019 to 27 March 2020 at two relatively distant olive farms (Ain fares and Oued taria) in the wilaya of Mascara, Algeria. Our results showed that infestation was high on trees in the Oued taria farm. We found that E. olivina developed two generations per year, in spring, influenced by the climatic factors. The difference between the relative abundance of the different life stages (eggs, larval instar 1, 2, 3, 4 and 5, female and male) in the cardinals orientations was significant. Infestation was highest on the southern and central orientations of the tree. Populations fluctuations were significantly affected by season at both farms.
Highlights
Olive farming is a major agricultural activity in Algeria
The results of the annual fluctuation of Euphyllura olivina are shown in figure 1
According to Kaplan and Alaserhat (2019), there is a close relationship between the ecology of E. straminae and plant phenology and climate condition
Summary
Olive farming is a major agricultural activity in Algeria. The trees hardiness and plasticity allowing it to produce olives in harsh conditions (FAOSTAT, 2017). Olive production is limited by several problems Several insect pests, such as the olive fruit fly (Bactrocera oleae, its main pest), the olive moth (Prays oleae), the olive psyllid (Euphyllura olivina), and the black scale (Saissetia oleae) are the main causes of low productivity. These pests attack all the parts of the tree, the leaves, flowers, twigs, and fruit (El Hadrami and Nezha, 2001). (Debo et al, 2011; Triapitsyn et al, 2014), it can live on other Oleaceae such as Phillyrea angustifolia and P. latifolia This species has a wide distribution, having been reported from Algeria, Austria, Corsica, France, Germany, Great Britain, Iran, Italy, Madeira, Malta, Montenegro, Morocco, Palestine, Portugal, Slovenia, Spain, Switzerland, Tunisia, and Yugoslavia. It was first recorded from Algeria by Arambourg, in 1986
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