Iman mussa omran* ⁽¹⁾    Khadim salah Hassan ⁽²⁾   Nasir Abd Ali AL Mansour ⁽²⁾

(1).Department of plant protection -college of Agriculture –university of Basra,Iraq.

(2). Department of Biology – College of Science – University of Basra – Iraq

(*Corrsponding author: Iman mussa omran:E- imanm3980@ gmail).

Received: 26/09/2020                                Accepted: 10/01/2021

Abstract

This study was conducted in the year 2019, The experiment in the laboratory of biological control in the department of Biology, college of science, university of Basra. This study included the effect of alkaloid plant extracts Conyza dioscoridis, Cymbopogon citratus and Moringa oleifera at three concentrations 1, 2 and 4% with three replicates in each one for control of insect O. surinamensis in two ways. The results showed the alkaloid plant extracts C. citratus were the best in the morality of insect in the both ways spray and grains treatment were reached 43.71 and 15.93%    respectively. Then all the alkaloid   plant extracts reduce the number of F1 after 40 days of treatment which was reflected in the percentage of reducetion F1 in the both ways of the comparison with the control treatment, also the result appeared all the alkaloid plant extracts reduce the weight loss of grain in comparative with control treatment. The results appeared alkaloid plant extract C. dioscoridis was the best anti feeding index for the insect O.surinamensis  reached 55.5%.

Keyword: Insect saw- toothed grain beetle, Alkaloids plant extracts, Conyza dioscoridis, Cymbopogon citratus and Moringa oleifera .

Full paper in Arabic: PDF