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

Abstract

Summary In this study, we aimed to evaluate the nematicidal activity of cinnamon bark extracts (CE) and chitosan (Cs) against Meloidogyne incognita and Pratylenchus coffeae under pot and field conditions. In the pot experiments, CE mixed with Cs effectively inhibited M. incognita and P. coffeae infection on robusta coffee plants. The formulations applied, CE:Cs = 8 mg:30 mg, CE:Cs = 16 mg:60 mg and CE:Cs = 16 mg:60 mg 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 = 48 mg:180 mg CE:Cs = 80 mg:300 mg and CE:Cs = 112 mg:420 mg plant−1 effectively reduced root gall formation and nematode density in roots and soil compared with the non-treated 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.

Nematicidal activity of Glycyrrhiza uralensis Fisch. root extracts on Meloidogyne incognita eggs and juveniles

“…of J2 at D0 -Egg at D0 --------------------------------------------------------------------------------------demonstrates toxicity of licorice extract against Trichostrongylus and Teladorsagia, and that G. glabra extracts exhibited activity against RKN [27]. The use of medicinal plant extracts against PPNs has increased in recent years because of their low cost and little or no side effects [2,19,28]. In this study, the organic and aqueous extracts used for hatch inhibition assays against M. incognita exhibited significant activity (Table 1).…”

“…Meloidogyne incognita was collected from the roots of infected tomato plants. Briefly, the galled root samples were washed with water, cut into 4-8 mm long pieces, and transferred into a conical flask containing a mixture of distilled water and NaOCl [18,19]. The eggs and juveniles of M. incognita were collected using a modified Baermann funnel method [20][21][22].…”

Use of Plant Material in the Management of Plant Parasitic Nematodes

“…was demonstrated by Castagnone-Sereno et al [99], demonstrating that neem contains azadirachtin, which inhibits the worms' ability to molt and hinders their growth and reproduction. Neem is also believed to Use of Plant Material in the Management of Plant Parasitic Nematodes DOI: http://dx.doi.org/10.5772/intechopen.1002742 contain the compound azadirachtin, which has strong nematocidal activity against a number of nematode species [100].…”

A Review of the Potency of Plant Extracts and Compounds from Key Families as an Alternative to Synthetic Nematicides: History, Efficacy, and Current Developments

“…Additionally, E-cinnamaldehyde has been shown to possess fumigant properties; reducing nematode populations at rates comparable to those obtained with the fumigant dazomet ( Jardim et al, 2020 ). Cinnamomum aromaticum crude extracts were also shown to effectively inhibit infection of M. incognita on cucumber plants ( Nguyen et al, 2012 ); while extracts of cinnamon bark mixed with chitosan were found to effectively inhibit M. incognita and P. coffeae infections on robusta coffee plants under field conditions ( Nguyen et al, 2020 ). Cinnamomum zeylanicum bark and leaf oil (containing mostly cinnamaldehyde and eugenol) was also very effective against M .…”