A preliminary Study of Use Some Inert Dusts Against Seed Beetle Callosobruchus maculatus (F.) under Laboratory Conditions

A Preliminary Study of Use Some Inert Dusts Against Cowpea Seed Beetle Callosobruchus maculatus (F.) under Laboratory Conditions

Ebraheem Al-Jouri*(1) Rehab Esber(2) and Ziad Chikh-Khamis(2)

(1). Institute of Phytomedicine, Faculty of Agricultural Sciences, University of Hohenheim, Stuttgart, Germany.

(2). Plant Protection Department, Faculty of Agricultural Engineering, Al-Baath University, Homs, Syria.

(*Corresponding author: Dr. Ebraheem Al-Jouri. E-Mail: aljouri@uni-hohenheim.de or ejouri73@gmail.com.

Received: 10/04/2021                                 Accepted: 03/05/2021

Abstract

The study aimed to test the effectiveness of five different inert dusts (silica, kaolinite, pumice stone, salt rock, zeolite) against the Callosobruchus maculatus (F.) (Coleoptera, Bruchidae) at a concentration of 5g/kg cowpea seeds. The study was carried out in incubator with fixed temperature (27±1 C̊̊) and humidity (60±5%) at Biotechnology Research Center, Al-Baath University, Homs, Syria. The results showed that all inert dusts tested were effective against C. maculatus and the highest mortality ratio was observed in kaolinite treatments (94.86, 94.72, 85.88) % after 24, 48 and 72 hours respectively, but the lowest mortality ratio was observed in salt rock treatments (48.00, 31.43 and 26.27) %. Kaolinite was the best in its effectiveness on the reduction of new adult emergence (99.29%), weight loss (99.01%) and damage ratio (99.39%) in comparison with other inert dusts tested.

Keywords: Inert dusts, Cowpea seed beetle, Callosobruchus maculatus.
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