POTENSI PENGENDALIAN TRICHODERMA SPP.TERHADAP GANODERMA SP. DI PERTANAMAN ACACIA MANGIUM UMUR ENAM BULAN

Abstract

The objectives of this study were to ascertain the effectiveness of Trichoderma spp. which was applied innurseries to control Ganoderma sp. in plantations of/I. mangium. Trichoderma spp. Isolates T „ and T „ inpellet form were applied in a ratio of five pellets to each A. mangium seedling, following w il h A. mangiumseedlings which were planted in the field. .At the ages of six months, the level of attack by Ganoderma sp. wascounted at sampling intensity of 100%, and soil samples were taken from around the planting with a samplingintensity of IQ'A in order to identify the presence of isolates T „ and T ^ as well as to identify the soil chemicalproperties. The results of identification through inacro.scopic and microscopic observation as well as dualculture tests, pointed back to isolates which appear to be T „ and T^j. In addition, results of the study showedthat for 6-month old A. mangium, the use of applications of T ^ tead to a tower level of attack by Ganoderma sp.in plantations of A. mangium (0.67%) compared to applications of T „ (1.17%) and the control (0.83%).Grow th of T „ isolate in SA medium up to the sixth day was better (65.49 cm') than that of T,j (36.35cni-).