Biocontrol of Fusarium wilt of banana: Key influence factors and strategies

Abstract

Fusarium wilt of banana, caused by Fusarium oxyspoum f. sp. cubense (Foc), is one of the most important and destructive diseases of banana, and is known to be a major biotic limiting factor for the development of the present banana industry. Biocontrol on the destructive disease, the use of antagonist as biocontrol agents (BCAs) against Foc, constitutes an effective option for the management of the disease. The effectiveness of biocontrol agents depends on a range of biological and physico-chemical factors, including the type and properties of the biocontrol agents, the obstacles to the initial colonization of antagonists, as well as the variation factors after initial colonization. Various strategies can be implemented to optimize the biocontrol efficacy, such as the use of endophytes from banana plants as BCAs (favorably Bacillus spp.), the development of water and nutrition retaining agent, the application of proper carrier for BCAs, the restoration of soil biodiversity, and combined management of nematodes disease and Fusarium wilt. In this review, elements affecting the biocontrol efficacy of Fusarium wilt are analyzed in detail, and strategies to promote the biocontrol effects are proposed. Besides, the concept of "post-indigenousness" and "post-indigenous microbes" were firstly suggested.

FusariumWilt in Banana: Epidemics and Management Strategies

“…Due to the continuous spread of Fusarium wilt, biological control offers a commendatory disease management approach [58][59][60][61]. Diverse microbes such as Pseudomonas fluorescens, Trichoderma viride, Bacillus spp., Serratia spp., Pseudomonas aeruginosa, Streptomyces violaceusniger, Y-Proteobacteria, Bacillus subtilis, Pseudomonas spp., and nonpathogenic Fusarium had been tested against Fusarium wilt disease in which most of the published works resulted from in vitro assays or short-term greenhouse studies [34,59,[62][63][64][65][66][67][68][69][70][71][72].…”

“…Parameters used to measure radiation sensitivity and postirradiation recovery include survival rate, propagation, shoot height, and fresh weight which are all expressed as percentage of the control [130]. References [121,130] used the same source of gamma irradiation, which was 60 Co, but with different experimental methodologies. According to Roux and Wingfield [130] irradiated seven banana clones of dissimilar ploidy level and genomic institution (Calcutta4 (AA), Kamaramasenge (AB), Tani (BB), Grande Naine (AAA), Williams (AAA), Three Hand Planty (AAB), and Cachaco (ABB)) with 10 doses of 60 Co ranging from 10 to 100 Gy at a dose rate of 44 Gy/min.…”

“…References [121,130] used the same source of gamma irradiation, which was 60 Co, but with different experimental methodologies. According to Roux and Wingfield [130] irradiated seven banana clones of dissimilar ploidy level and genomic institution (Calcutta4 (AA), Kamaramasenge (AB), Tani (BB), Grande Naine (AAA), Williams (AAA), Three Hand Planty (AAB), and Cachaco (ABB)) with 10 doses of 60 Co ranging from 10 to 100 Gy at a dose rate of 44 Gy/min. The optimal dosage for diploid cultivars Calcutta4 (AA) and Tani (BB) was in the same range, which was 10-20 Gy of gamma irradiation.…”

“…From the results, it was evident that lower dosage treatment was preferred as it could minimize the chromosome distortion and other harmful outcomes. Bhagwat and Duncan [121] in their experiment irradiated three different explants of Highgate cultivar with 60 Co gamma rays. All three types of explants, Type I dissected apices, Type II 4-week-old cultured apices, and Type III in vitro-cultured corms, were treated with different dose rates, which were 101.82, 177.37, and 256.8 rads/min, respectively.…”

Isolation and Characterization of Potential Isolates of Rhizosphere Bacteria to Contro Budok Disease in Patchouli Plant

“…ciceri pada tanaman buncis (Karthick et al 2017), F. graminearum Schabe pada gandum (Baffoni et al 2015), F. solani pada tanaman tomat (Ajilogba et al 2013), F. oxysporum f.sp. cubense pada tanaman pisang (Gang et al 2013), dan Botrysophaeria dothidea pada buah peach (Li et al 2016). Selain itu, Bacillus sp.…”