10.22376/ijpbs.2019.10.1.p1-12 Volume 2 Issue 4 2011 (October - December) Plant diseases are characterized by wilting, moldy coatings, rusts, blotches, scabs and rotted tissue. They are often encouraged by wet weather, poor drainage or inadequate airflow. Some fungal problems can be controlled by reducing high moisture conditions and by cutting away diseased plant parts. In most cases however, a fungicide will be required. The organic fungicides we offer are least-toxic and earth-friendly. For best results apply early, before diseases become aggravated.` An excellent organic fungicide, Sulfur Plant Fungicide is a finely ground wettable powder containing 90% elemental sulfur, Control diseases of fruits, vegetables and flowers and effective against powdery mildew, rust, scab, brown rot, rose black spot and many more. There is large number of chemical compounds for the protection of crops available commercially in the market but their effects depends on the climate, type of soil, and other physical parameters. The interactions of proposed fungicides with the macromolecule of the parasite are dependent on the stereochemistry of these compounds. In order to design more effective synthetic fungicides, it is necessary to analysis the three dimensional structure of these compounds and if possible the receptor molecule .Recently it has been observed that some of the fungicides are loosing their effects. if their structures are known, So analogous compounds can be designed as substitute. Dr Jyotsna Chauhan And Rajesh Kumar X-ray crystallography, Systemic fungicides, Triazole structure 413-418