Bio-Management of root-knot nematode (Meloidogyne incognita) in tomato (Lycopersicon esculeutum L.)

Abstract

Tomato (Lycopersicon esculeutum L.) is one of the most important vegetables grown in India. It is grown for the domestic market under both rains fed and irrigated conditions. Due to the high demand for tomato in the domestic market and for processing, farmers have extensively adopted high yielding varieties and modern technologies like greenhouse production to ensure year round production and increase production. Intensive tomato cultivation in India has resulted in build-up of soil borne diseases, especially root-knot nematodes. Various bio-control agents' viz. Trichoderma virde Paecilomyces lilacinus and Beauvaria bassiana were used for experimental purpose. The result showed that Trichoderma virde was very effective for the management of rootknot namatode followed by Paecilomyces lilacinus and Beauvaria bassiana respectively. Maximum growth parameters {shoot length (58.25cm), root-length (19.75cm), fresh shoot weight (15.37g), fresh root weight (2.37g) and number of fruits (2.25)} were observed in Trichoderma virde followed by P.lilacinus {shoot length (53.00cm), root-length (13.00cm), fresh shoot weight (11.75g), fresh root weight (2.12g) and number of fruits (1.7)} and Beauvaria bassiana {shoot length (49.75cm), root length (8.75cm), fresh shoot weight (9.25g), fresh root weight (1.25g) and number of root-knot was noted in T. viride (17.25), P. lilacinus (18.50) and B. bassiana (24.50) respectively).

Potential of Pleurotus sajor-caju compost for controlling Meloidogyne incognita and improve nutritional status of tomato plants

“…The present results are in agreement with some previous studies, which indicate the viability of using MC as an organic fertilizer for growing tomato plants [67][68][69]. Similarly, Pant and Singh, et al [59] reported that spent compost of P. sajor caju was effective for improving tomato growth parameters and soil fertility. Further, the growth parameters were increased due to quick metabolism of MC, release of nutrients which accelerate rapid root development and over all plant growth of tomato.…”

“…Whereas, the signi icantly lowest value of fruit yield/plant was recorded with the untreated plant in both seasons. Many authors greatly supported our indings [19,26,59,69]. They found that MC was effective as soil amendments for improving tomato growth performance and fruit yield.…”

“…The nematoxic effects of MC may be attributed to the phenolic compounds present in MC, which have antimicrobial activity and could be an effective biocontrol of root-knot nematodes on tomato [24]. Furthermore, Pant and Singh, et al [59] reported that spent compost of P. sajor caju was effective for management and minimise the root galls of M. incognita on tomato plants because its mycelium is carnivores, eats nematodes, exudes extracellular toxins that stun the nematodes, where upon the mycelium invades its body through its ori ices.…”

Pathogenicity Efficacy of Entomopathogen Fungus Beauveria bassiana Against In Vitro Rice Stem Borer (Scirpophaga innotata)

“…Toxic peptide compounds are also effective in controlling the growth of mosquito larvae (Jelenić et al, 2021). Bauvarin from B. bassiana has also been reported to affect root nodes caused by the parasitic nematode, namely Meloidogyne, and trigger plant growth (Pant et al, 2018). This compound is also reported to be found in Trichoderma sp.…”