Effect of Plant Growth Promoting Rhizobacteria (PGPR) on Verticillium Wilt of Cotton
Jun 16, 2019

Disease control Agronomy & physiology Network coordination Agro-phyisio-Med-MiddleEast Network-MedMiddleEast Disease-MedMiddleEast

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Hamdullah Korhan1, Lale Efe2, Yuksel Bolek3 and Mustafa Kusek4

1Kahramanmaras Sutcu ımam university, graduate school of natural and applied sciences, Kahramanmaras, Turkey

2Kahramanmaras Sutcu Imam University, Faculty of Agriculture, Department of

Field Crops, Kahramanmaras, Turkey,

3Kahramanmaras Sutcu Imam University Faculty of Agriculture, Department of Agricultural Biotechnology, Kahramanmaras, Turkey

4Kahramanmaras Sutcu Imam University Faculty of Agriculture, Department of

Plant Protection, Kahramanmaras, Turkey


Verticillium wilt of cotton is a destructive disease that causes considerable yield losses on the crop. There is no effective method for controlling Verticillium wilt of cotton that is one of the world’s most devastating diseases except breeding resistant varieties. Due to environmental concerns of chemicals used in the control of this disease in which using antagonistic bacteria as a biocontrol agent to suppress the disease is very important. In addition, bacteria converting phosphorus to a form that is useful for the plant can offer an advantage for plant growth and disease resistance. Isolation the bacteria from the soil and use as plant growth regulation are the focus of some research has been going on.

Starting by 2014, this study will continue for 3 years. Starting, soil samples were collected at different vegetative periods of plant from 25 different cotton producing areas (from July to September) and pure strain cultivars were obtained from 650 soil samples. Tests applied to these strains are Hypersensitive Reaction on Tobacco, Levan Formation, Oxidase, Hydrogen Peroxide And Potassium Hydroxide. Resulting of identification tests, isolates that doesn’t have pathogenicity were tested for the ability to convert the phosphorus obtainable for by the plants, resulting of identification tests, isolates that doesn’t have pathogenicity will be used to antimicrobial activity in both greenhouse and in the field trials.

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