Abstract
Biological control by using antagonistic microorganisms is an alternative that is currently being carefully studied and used as a control of plant diseases. Endophytic microorganisms also play an important role in controlling plant diseases which are induction-resistant. Endophytic antagonist fungi have high activity in producing enzymes that can be used to control pathogens. The purpose of this study was to determine the effectiveness of rubber plant endophytic fungi as biological agents against fungi C. gloeosporioides in rubber (Hevea brasiliensis Muell. Arg.) plants. This study was conducted at the Sei Putih Rubber Research Center, Galang, Deli Serdang, North Sumatra Province in February to March 2019. The design used was Factorial Randomized Block Design with 3 replications and Combinations with 5 duplication. The results of the test on the effectiveness of endophytic fungi from rubber leaves with 104 spore treatment and secondary metabolites resulted in different endophytic ability to fall fungi leaf of Colletotrichum. Endophytes can improve the plant's defense mechanism against deciduous leaves of Colletotrichum, in addition it also produces antibiotic substances that can inhibit growth.
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