Ssilverleaf nightshade (Solanum elaeagnifolium Cav.) is a serious weed to cotton and other field summer crops due to the alkaloids present in the plant and have allelopathic potential on the germination of other plants. Sorghum (Sorghum bicolor) have been investigated as a allelopathic crop having strong competition potential in the field containing many numerous water solution allelochemicals and can be used to control weeds in field crops. A field competition study between sorghum and silverleaf nightshade plants was conducted to determine how long every plant can resist against the other.