Abstract

• The present study is concerned with investigation of the mycorrhiza on the lettuce plants not only to determine their growth but also for the multiplication of mycorrhiza inoculum. Mycorrhiza spores were collected from five weed plants in Mawlamyine University Campus during June to December, 2014 by using floating adhesion technique and wet sieving method. Mycorrhiza, collected from five selected weeds plants were mixed with sterile soil and inoculate on lettuce plants. Spores density and mycorrhizal colonization from rhizosphere of lettuce plants were recorded in every two weeks. Among five selected weed plants, the maximum rate of spore number and the highest colonization percent of mycorrhiza on lettuce plants were isolated from Eclipta alba ( L.) Hassk. (Kyeik hman). Mycorrhiza isolated from Eclipta alba ( L.) Hassk. (Kyeik hman) were used as inoculum and subjected into multiplication procedure. The polyethylene bag experiments were conducted on Lactuca sativa L. (lettuce). There are five treatment namely soil 5 kg soil (T1), natural mycorrhiza 1 kg + soil 4 kg (T2) , natural mycorrhiza 1 kg + biocomposer 0.5 kg + soil 4 kg (T3), natural mycorrhiza 1 kg + cow dung 0.5 kg + soil 4 kg (T4) and commercial mycorrhiza fertilizer (MF) 15 g + soil 5 kg (T5) in polyetylene bag culture were used in the study. According to the result, the highest mycorrhiza inoculum potential (MIP) index were also found in T2 (10.50) and T4 (10.50).