Nematicidal activity of cinnamon bark extracts and chitosan against Meloidogyne incognita and Pratylenchus coffeae

What is it about?

In this study, we aimed to evaluate the nematicidal activity of cinnamon bark extracts (CE) and chitosan (Cs) against M. incognita and P. coffeae under pot and field conditions. In the pot experiments, cinnamon extracts mixed with chitosan effectively inhibited M. incognita and P. coffeae infection on robusta coffee tree. The formulations applied, CE:Cs=8mg:30mg, CE:Cs=16mg:60mg, and CE:Cs=16mg:60mg, per pot significantly reduced the gall index and nematode number in 5 g of root and 100 g of soil. In addition, the application of CE:Cs=48mg:180mg CE:Cs=80mg:300mg, and CE:Cs=112mg:420mg per tree effectively reduced root gall formation and nematode density in root and soil compared with the untreated control under field conditions. Nematode density in the roots was positively correlated with the rate of yellow leaf disease. These results suggest that cinnamon mixed with chitosan may be used as an effective eco-friendly pesticide against plant parasitic nematodes.

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