A new screening method forGanoderma philippiitolerance in tropicalAcaciaspecies

Abstract

Red root rot disease caused by Ganoderma philippii is one of the most economically important diseases of tropicalAcacia species. Research on field control of the disease has to date focused on inoculum reduction, silviculture practices and application of biological control agents. Incorporation of tolerant genotypes, a key component of integrated disease management, has not been adequately explored because of a lack of reliable and quick screening protocols. Recently, we developed a more rapid method of screening for red root rot tolerance in Acacia mangium, A. crassicarpa and A. mangium  A. auriculiformis hybrid planting stock, in which groups of five, 6-week-old plants were subjected to inoculum consisting of a rubber (Hevea brasiliensis) wood block culture of the pathogen held within a polythene bag. As symptoms start to appear 10 weeks after inoculation, experiments can be completed in a six-month period instead of the years needed by the traditional pot system. Using this technique we were able to identify variations in tolerance and/or susceptibility to G. philippii in A. mangium, A. crassicarpa and A. mangium  A. auriculiformis hybrid planting stock in a more consistent manner. Tolerant and susceptible genotypes subsequently have been selected for further experiments or crosses. While the ultimate goal of this study was to develop and deploy high-yielding Acacia genotypes that are also tolerant to red root rot disease, results of the current screening studies may also be used to investigate the basis for tolerance to G. philippii in Acacia species.

Inventarisasi Penyakit Pada Tanaman Acacia mangium PT Bina Silva Nusa, Kalimantan Barat

“…Salah satu species utama untuk bahan baku pulp adalah A.mangium [2]- [4]. Pada tahun 2020 kebutuhan pulp diperkirakan mencapai 490 juta ton m 3 . Oleh karena itu banyak dilakukan perluasan lahan penanaman akasia termasuk dilahan-lahan marginal [2].…”

“…Penanaman pada hutan tanaman Industri yang kebanyakan monokultur tidak dapat dipisahkan dari musuh alami serta peningkatan serangan hama dan penyakit [6].. Serangan hama dan penyakit pada tanaman A. mangium telah banyak dilaporkan. Beberapa penyakit yang menyebabkan kematian dan kerugian cukup besar antara lain akasia di HTI Sumatera diserang busuk akar yang disebabkan oleh Ganoderma philippi [3], [7]. Kebun benih semai uji keturunan A. mangium di Wonogiri, Jawa Tengah juga dilaporkan terinfeksi busuk akar yang disebabkan oleh G. steyaertanum [8].…”

“…BSN Ganoderma dikenal sebagai jamur patogen penyebab busuk akar dan memiliki inang yang cukup luas. G. philipii dikenal sebagai species utama yang menyebabkan busuk akar pada A. mangium di Sumatera [7], [3], [2] A. mangium dan A. auriculiformis di Jawa tengah juga terinfeksi jamur G. steyaertanum [8] begitu pula kelapa sawit terancam oleh pathogen G. boninense.…”

The evolution and impacts of ACIAR’s forestry research program over three decades

“…In recent years, fungal diseases, such as Ganoderma and Ceratocystis, have caused significant death in tropical Acacia plantations in Indonesia. Recent research has enabled rapid screening of planting stock for variations in tolerance and/or susceptibility to G. philippi (Gafur et al 2015), while preliminary trials on resistance and tolerance to Ceratocystis has indicated that the development of resistant breeds will be challenging (Brawner et al 2015).…”

Development of Biocontrol Agents to Manage Major Diseases of Tropical Plantation Forests in Indonesia: A Review

“…The level of damage and incidence of this disease required development of effective management to secure sustainable production of forest plantations [15,16]. Incorporation of resistant genotypes [17,18] and use of biocontrol agents of microbial consortiums [19][20][21] are economically and environmentally feasible control measures to minimize the losses due to the disease. The biocontrol agents developed so far to manage root rot pathogens include Trichoderma, Gliocladium, Cerrena, Phlebiopsis, and some other white rot fungal species.…”