Study on control of seed base of rice of Pathum Thani 1 by chemical method and biological method. The experiment consisted of 7 treatments and 5 replications. Do not spray chemical and biological agents. Soak seeds in Trichoderma tablets. Trichoderma sprayed Soak injection with Trichoderma Sprayed with chemicals Sprayed with biological agents Sprayed with chitosan. That all things were not significant differences with statistical. Seed weight length spike height number of plants per clump seeds normal seed spotted grain blighted by Treatment direction height Seed weight spraying with biological agent. Try to come down The height of the spraying plante spraying with spray with biological agent. number of plants per clump Trichoderma sprayed. the length of the ear Soak seeds in Trichoderma tablets. normal seed obtained from the screening of the seeds from the seed weight outcome is Soak seeds in Trichoderma tablets. Seeds Dirty from the screening of seed weight outcome is Soak injection with Trichoderma. blighted seed from the screening of seed weight outcome is Trichoderma sprayed.