Nematicidal Activity of Phytochemicals against the Root-Lesion Nematode Pratylenchus penetrans
Year: 2024
Type: article
Abstract: Plant-parasitic nematodes (PPNs) are highly damaging pests responsible for heavy losses in worldwide productivity in a significant number of important plant crops. Common pest management strategies rely on the use of synthetic chemical nematicides, which have led to serious concerns regarding their impacts on human health and the environment. Plant natural products, or phytochemicals, can provide a good source of agents for sustainable control of PPNs, due to their intrinsic characteristics such as higher biodegradability, generally low toxicity for mammals, and lower bioaccumulation in the environment. In this work, the nematicidal activity of 39 phytochemicals was determined against the root-lesion nematode (RLN) Pratylenchus penetrans using standard direct and indirect contact methodologies. Overall, the RLN was tolerant to the tested phytochemicals at the highest concentration, 2 mg/mL, seldom reaching full mortality. However, high activities were obtained for benzaldehyde, carvacrol, 3-octanol, and thymol, in comparison to other phytochemicals or the synthetic nematicide oxamyl. These phytochemicals were seen to damage nematode internal tissues but not its cuticle shape. Also, the environmental and (eco)toxicological parameters reported for these compounds suggest lower toxicity and higher safety of use than oxamyl. These compounds appear to be good candidates for the development of biopesticides for a more sustainable pest management strategy.
Source: Plants
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDGs: Zero hunger, Life on land
Open Access status: gold
Estimated APC paid: $3,069
Awards: G1547343515, Instituto Mediterrâneo para a Agricultura, Ambiente e Desenvolvimento, G2149047050, G2219685250, G2637256346, G2673934937, Computer Aided Analysis Of Electrocardiography, G3534458110, Centro de Estudos do Ambiente e do Mar, G4046065984, G5454278309, G587154774, G670901311, Compounds produced by plants and bacteria for the control of the plant-parasitic nematode Pratylenchus penetrans – the plant response, G6997658380, G7123698595, Metabolómica da planta para o controlo do nemátode das lesões radiculares Pratylenchus penetrans, G7351000626, G7506750616, Centro de Estudos do Ambiente e do Mar
OpenAlex ID: W4392382005