Abstract
Apple (Malus pomila L) belongs to family Rosacea and it is an edible fruit; mostly utilized by different age groups. Apple trees are grown worldwide. It is considered an important fruit in the temperate region of Balochistan, Pakistan. Fire blight is caused by the pathogen Erwinia amylovora the most damaging disease of apple and other pomes orchards in the world. The aim of the present study was conducted to record the incidence of the disease and management through the use of chemicals. For this purpose, survey was conducted for disease samples from the various districts of Balochistan Viz., Quetta, Ziarat, Killa Saifullah and Kalat. Among all the districts Ziarat was found to be most severe by pathogen with 20% incidence followed by Quetta having 18.67%, Kalat14.31% and Killa Saifullah 13.44% incidence, and different chemicals, i.e. Streptomycin, Tetracycline, Gentamicin, Kasugomycin, Oxytetracycline at different doses were tested against the pathogen and all the chemicals shown great effectiveness against Erwiana amylorora In-vitro conditions. The maximum inhibition zone made by chemical streptomycin with value 15.50 and minimum value of tetracycline with 10.90.and there was no inhibition zone observed in control treatment. All the data was statistically analyzed
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