Abstract
Effect of Paecilomyces lilacinus on tomato plant growth and the management of root knot nematodes in tomato was studied. The research work was conducted in Microbiology & Bio-control Laboratory, Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh and in Net-house of Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh, during the period from July, 2016 to October, 2017. In net-house pot culture experiment, four different treatments were used viz., T1: Inoculation of egg masses (10 egg masses/plant) of Nematodes (Meloidogyne spp.), T2: Application of P. lilacinus, T3: Application of egg masses of Nematodes and P. lilacinus simultaneously, and T4: Control (non-treated). Spore suspension (10×105 Conc.) of P. lilacinus was mixed with the soil before transplantation and Meloidogyne spp. was inoculated on three days after transplantation. Application of P. lilacinus in soil enhanced the plant growth parameters of tomato plants. Inoculation of Meloidogyne spp. reduced plant growth and the reduction was increased with the increase of inoculum density of Meloidogyne spp. Maximum plant growth reduction was recorded when Meloidogyne spp. was inoculated alone. The maximum plant growth was recorded in case of application of P. lilacinus to soil. A high percentage (85%) of egg masses of Meloidogyne spp. was infected by P. lilacinus when applied together
 J. Bangladesh Agril. Univ. 17(1): 9–13, March 2019
Highlights
The tomato belongs to the family Solanaceae and the species Solanum lycopersicum is a premier vegetable in Bangladesh and are widely cultivated (Lucioli et al, 2014)
Culturing Paecilomyces lilacinus P. lilacinus was collected from Microbiology and Biocontrol Laboratory, Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh that previously isolated from commercial bio-nematicide supplied by Haychem (Bangladesh) Limited
Highest plant height was recorded by P. lilacinus (78.16 cm) application followed by simultaneous application of egg masses of Meloidogyne spp. and P. lilacinus (77.00 cm)
Summary
The tomato belongs to the family Solanaceae and the species Solanum lycopersicum is a premier vegetable in Bangladesh and are widely cultivated (Lucioli et al, 2014). Management of Root knot nematodes is difficult due to its wide host range. If high populations of root knot nematode occur early in the growing season, the host plant can be killed (Rahim et al 2016). Some chemical nematicides (insecticides) are reported to control effectively the root-knot nematodes of tomato. Paecilomyces lilacinus is a soil-inhabiting fungus with a wide range of activity against the most important plant parasitic nematodes (Vasanthi & Kumaraswamy, 1999; Brand et al, 2010). The present investigation was designed to evaluate the effect of P. lilacinus on tomato plants and the management of tomato root knot caused by nematodes. Effect of Paecilomyces lilacinus on tomato plants and the management of root knot nematodes.
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