Pengaruh Tumpangsari dengan Tanaman Rimpang Terhadap Infeksi Awal Ganoderma boninense pada Bibit Kelapa Sawit (Elaeis guineensis)

Abstract

Basal stem rot (BSR) caused by white decay fungus, Ganoderma boninense is known to cause significant losses in oil palm plantations in Southeast Asia. This study aims determined the effect of oil palm mixed planting with rhizomatous plants, galangal (Alpinia galangal), Java curcumin (Curcuma longa), or ginger (Zingiber officinale) on initial infection of BSR. The research was conducted at screen home October to December 2020. Plants were inoculated by attachment of rubberwood block colonized with G. boninense to the main roots. Infection was measured as the length of root necrosis and confirmed by culturing on Ganoderma selective medium. Infection was also assessed by total activity of ligninase as measured by RBBR decolorization. The results showed that G. boninense infection at 1-month-post inoculation was lower on a mixed planting with all rhizomatous plants, and the suppression of infection was still occurred in a mixed planting with galangal. The total activity of ligninase on oil palm roots was delayed on a mixed planting compared to that of higher activity on single planting at 1-month-post inoculation. This result highlights the benefit of mixed planting of oil palm with rhizomatous plants in delaying initial infection of BSR pathogen.

Interference of wood decay, growth, and infection ofGanoderma boninenseby ligninolytic fungi from herbaceous plants

“…Mixed planting of oil palm with herbaceous plants may reduce the disease and potential inoculum of Ganoderma boninense. Ganoderma disease interference by rhizomatous plants such as ginger and Java turmeric occurred directly through both antifungal plant exudates and infection interference [11,12]. Taro plants interfered with Ganoderma disease through those above mechanisms [13] and also by increasing the decaying of Ganoderma wood inoculum [14].…”