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<p>Root-knot nematodes (<i>Meloidogyne</i> spp.) are significant pests that cause considerable damage to crops, prompting a need for sustainable control methods. This study evaluated the nematicidal potential of fungal culture filtrates and botanicals as eco-friendly alternatives. In vitro tests demonstrated that Lemongrass oil (LG) (0.2%) achieved the highest mortality of nematode juveniles (J<sub>2</sub>s) at 99.44% within 48&#xa0;h, while <i>Pochonia chlamydosporia</i> (<i>Pc</i>) (2%) and <i>Purpuricillium lilacinum</i> (<i>Pl</i>) (2%) reduced egg hatching rates to 9.57% and 11.43%, respectively. Neem oil (NM) (0.2%) was the most effective in preventing J<sub>2</sub> root penetration (4.42%). In vivo, a combination treatment (T<sub>7</sub>) of NM (0.2%), <i>Trichoderma harzianum</i> (<i>Tz</i>) (2%), <i>Pl</i> (2%), and LG (0.2%) applied at 10 day intervals significantly reduced the nematode reproduction factor to 0.035, comparable to the chemical control Bayer Velum Prime<sup>®</sup> (Fluopyram 34.48% W/W SC) (0.031). T<sub>5</sub> (NM and <i>Tz</i>) resulted in the highest shoot biomass (236.73 ± 1.38&#xa0;g), while Bayer Velum Prime<sup>®</sup> (Fluopyram 34.48% W/W SC) increased root biomass (31.75 ± 1.24&#xa0;g). Additionally, T<sub>7</sub> produced the longest shoots (63.37 ± 0.74&#xa0;cm) and roots (36.80 ± 0.3&#xa0;cm), with fewer root galls (55.67 ± 1.53) and egg masses (4 ± 0.01). T<sub>7</sub> also minimized the final soil nematode population to 106.33 ± 1.01 per 100&#xa0;g, closely followed by T<sub>8</sub> (94.67 ± 0.89). These results indicate that combining NM, <i>Tz</i>, <i>Pl</i> and LG provide effective nematode control without phytotoxic effects, enhancing plant growth and offering a promising sustainable alternative to chemical nematicides.</p>

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Implementing sustainable practices to combat root knot nematode infestation in tomato farming from Meghalaya

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年1月2日

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  • H. Jeevan,
  • Raghubir Kumar Patidar,
  • Veronica Kadam,
  • Pranab Dutta,
  • Euphema Nongbri,
  • M. N. Rudra Gouda,
  • Santosh Naik,
  • N. S Nysanth

摘要

Root-knot nematodes (Meloidogyne spp.) are significant pests that cause considerable damage to crops, prompting a need for sustainable control methods. This study evaluated the nematicidal potential of fungal culture filtrates and botanicals as eco-friendly alternatives. In vitro tests demonstrated that Lemongrass oil (LG) (0.2%) achieved the highest mortality of nematode juveniles (J2s) at 99.44% within 48 h, while Pochonia chlamydosporia (Pc) (2%) and Purpuricillium lilacinum (Pl) (2%) reduced egg hatching rates to 9.57% and 11.43%, respectively. Neem oil (NM) (0.2%) was the most effective in preventing J2 root penetration (4.42%). In vivo, a combination treatment (T7) of NM (0.2%), Trichoderma harzianum (Tz) (2%), Pl (2%), and LG (0.2%) applied at 10 day intervals significantly reduced the nematode reproduction factor to 0.035, comparable to the chemical control Bayer Velum Prime® (Fluopyram 34.48% W/W SC) (0.031). T5 (NM and Tz) resulted in the highest shoot biomass (236.73 ± 1.38 g), while Bayer Velum Prime® (Fluopyram 34.48% W/W SC) increased root biomass (31.75 ± 1.24 g). Additionally, T7 produced the longest shoots (63.37 ± 0.74 cm) and roots (36.80 ± 0.3 cm), with fewer root galls (55.67 ± 1.53) and egg masses (4 ± 0.01). T7 also minimized the final soil nematode population to 106.33 ± 1.01 per 100 g, closely followed by T8 (94.67 ± 0.89). These results indicate that combining NM, Tz, Pl and LG provide effective nematode control without phytotoxic effects, enhancing plant growth and offering a promising sustainable alternative to chemical nematicides.