Eco-friendly management of red rot disease of sugarcane with Trichoderma strains

Abstract

Eighty strains of Trichoderma harzianum and T. viride occurring in sugarcane rhizosphere soil of sub-tropical zone were isolated on Trichoderma specific medium and tried screened in vitro against Colletotrichum falcatum. Highly potent ones (Th 37 & Th 38) were tried to manage red rot disease under field conditions. Healthy setts were treated by applying Trichoderma mixed culture (TMC) of T. harzianum strains grown in sterilized maize bran (2 kg) and subsequently mixed with sterilized press mud or FYM (20 kg) / ha. The treatment was also compared with spore suspension containing 10 6 conidia / ml and metabolites (2.5% culture filtrate). Combinations were also tried for improving efficiency. The trials were repeated thrice in CoLk 7701, a highly susceptible variety / genotype. Disease management was ascertained by inoculation challenged with potent Colletotrichum falcatum pathotype (Cf 09). Infection of C. falcatum was protected in 45-55% plants. There was no infection in such plants as against 97-100% infection in check. Red rot infection was also considerably suppressed in 20-25% plants. Where grade of infection was reduced to 2-4 in 0-9 scale. Testing was made at an appropriate temperature (30 0 C) and high relative humidity (90%) during July-August. The protection offered might be due to direct parasitic action of T. harzianum on C. falcatum and also systemic resistance induced in sugarcane. Application of T. harzianum is useful for management of red rot and cultivation of moderately resistant varieties for several years. It is also useful for reducing the economical losses in susceptible varieties. The yield was also enhanced by 15-20 t / ha due to improved germination and shoot biomass. Application of Trichoderma biopesticide is eco-friendly, economical and efficient for improving soil health also.

Different mechanisms of Trichoderma virens‐mediated resistance in tomato against Fusarium wilt involve the jasmonic and salicylic acid pathways

“…Similarly, increased P uptake improved the growth and yield of infected citrus ( Citrus limon ) trees (Zhao et al ., ). Our results indicate that T. virens is required to mobilize and increase nutrient uptake by the plant; T. virens is more efficient and competitive than many other soil microbes in promoting growth and improving plant fitness (Hermosa et al ., ; Singh et al ., ). Therefore, we can hypothesize that the energy required to induce TriV_JSB100‐mediated FOL resistance does not affect tomato plant development.…”

“…The data presented are from representative experiments that were repeated at least four times with similar results. microbes in promoting growth and improving plant fitness (Hermosa et al, 2012;Singh et al, 2008). Therefore, we can hypothesize that the energy required to induce TriV_JSB100-mediated FOL resistance does not affect tomato plant development.…”

Antifungal properties of rhamnolipid produced by Pseudomonas aeruginosa DS9 against Colletotrichum falcatum

“…Eco‐friendly management of red rot of sugarcane has been performed with Trichoderma strains . Later, it was reported that by Hassan et al that plant growth‐promoting rhizobacteria has potential to be used as biopesticide to control red rot disease of sugarcane.…”

Biological control of sugarcane smut (Sporisorium scitamineum) through botanicals and Trichoderma viride

“…Srivastava et al (2006a, b) observed enhancement in germination and yield parameters of sugarcane in both plant and ratoon crops by the use of Trichoderma sp. Singh et al (2008) and Yadav et al (2008) have also reported that red rot disease of sugarcane can be managed by the application of T. harzianum since it acts directly on C. falcatum and induces systemic resistance in plants developed from treated setts. Reduction in disease incidence and enhancement in growth parameters in various crops by the use of Trichoderma spp.…”