Abstract
This study aims to determine the ability of Trichoderma atroviride and Gliocladium sp. in inhibiting the fungus that causes Gumosis disease Botryodiplodia theobromae. This study used a completely randomized design with two single treatments and was repeated eight times.
 In the in-vitro antagonism test Trichoderma atroviride and Gliolcadium sp. can inhibit the fungus Botryodiplodia theobromae as well. The percentage of inhibition was 94.58% in the Trichoderma atroviride antagonism test and 81.67% in the Gliocladium sp. antagonism test. Whereas the Botryodiplodia theobromae Colony Area had no significant effect on both treatments. Each Botryodiplodia theobromae Colony area is 18.34 cm2 with T. atroviride treatments and 22.25 cm2 with Gliocladium sp. treatment. The growth rate of Botryodiplodia Theobroma fungi was superior to that of Trichoderma atroviride and Gliocladium sp.
Highlights
Osbeck) is native citrus originating from Indonesia and spread throughout Southeast Asia and to several countries
Materials Research The materials used in this study were soil samples from the rhizosphere of rice and citrus plants, plant skins attacked by B. theobromae, Potato Dextrose Agar (PDA), potatoes, agar, sucrose, 70% alcohol, distilled water, and antibiotics (Chloramphenicol)
Gliocladium sp. isolate shows the morphology of Gliocladium sp. has a colony of green spots on the spores according to the morphology [13]
Summary
Osbeck) is native citrus originating from Indonesia and spread throughout Southeast Asia and to several countries. Grapefruit has various names in each region in Indonesia. The names in each region for this type of citrus vary, namely Jeruk Pandan, Jeruk Sinyonya, Jeruk Cikoneng, Jeruk Nambangan, Jeruk Delima, Jeruk Silempang, Jeruk Oyod Gondong, Jeruk Nambangan-Madiun, Jeruk Bali, Jeruk Gulung, Jeruk Pandanwangi [1]. Grapefruit in Balinese speaking is called Jerungge. This orange is the largest citrus species that has a thick skin and large pulp. Grapefruit is usually cultivated in the yard of Balinese people as a yard fruit plant that has fragrant flowers so that the yard becomes fresher
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