Abstract

The appropriate climatic conditions for the spread of rust disease on agricultural crops were studied in Diyala Governorate. The study aims to clarify the appropriate climatic conditions for the spread of rust disease on agricultural crops in the governorate, as it is one of the factors affecting agricultural crops that pose a threat to living organisms, and therefore it serves as a protector for the environment from the risk of deterioration and pollution. The study relied on meteorological data and information and the Ministry of Agriculture in Diyala Governorate. The study concluded that The appropriate months according to the requirements of rust disease for the maximum temperature of Al-Khalis station and Al-Khanaqin station in the study area after June, July, August and September are moderately suitable, with a percentage of (22.5) degrees.The months of January, May and September are after average suitability, with a percentage of (4.0) degrees. February, March, April, May, October, November and December are not suitable, with a percentage of (5.0) degrees. The degree of suitability varies, as the degree of excellent suitability was recorded at (25) C, limited according to the requirements of rust disease, while the average degree was (20-35) C. As for the unsuitable, it was recorded as less than (19) and more than (36) C.