Ali Hassan* ⁽¹⁾, Nabil Abo Kaf ⁽²⁾, and  Iyad Mohammed⁽³⁾

(1). PhD Student, Department of plant protection, Faculty of Agriculture Tishreen University, Lattakia, Syria

(2). Professor, Department of Plant Protection, Faculty of Agriculture Tishreen University, Lattakia, Syria

(3). Researcher, Director of the Plant Protection sector, Ministry of Agriculture, Damascus, Syria.

 (*Corresponding author: Ali Hassan, E-Mail: alihasan1990944@gmail.com, Mob: 0988346017)

Received: 21/1/2024          Accepted: 29/7/2024

Abstract

The research was carried out in the insect laboratory of plant protection department at the faculty of Agricultural engineering, Tishreen University, Syria, under controlled laboratory conditions during 2022, with the aim of studying the Parasitism rates of the parasitoid Scutellista caerulea on the citrus wax scale Ceroplastes floridensis using life tables based on sex and age stage to analyze data. Life and parasitism rate, as Cucurbita moschata fruits were used as host plants for this insect, and infection with the pest was obtained from infected citrus trees in the form of females containing eggs (infection stage). Results showed that the highest value of the net Parasitism rate (C₀) for the parasitoid was 6.08 offspring/individual at 25°C, while the lowest was at 20°C, that it reached 5.21 offspring/individual, and the highest value of the limited Parasitism rate was 0.0608 offspring/individual at 30°C and 0.0513 offspring/individual at 30°C, and the highest value of the Parasitism rate associated with the age stage (c_xj) of parasitoids females was 12.3 offspring/individual at a temperature of 25°C.

Keywords: life tables, Ceroplastes floridensis, Scutellista caerulea, laboratory conditions, parasitism rate, temperature.
 Full paper in Arabic: PDF