The effect of three plant extracts on Meloidogyne incognita (Kofoid & White, 1919) Chitwood, 1949 (Tylenchida: Meloidogynidae)

Abstract

The use of plant extracts for biotechnical control root-knot nematodes is increasingly important. In this study, the efficacy of three plant extracts, Thymbra spicata L. (Lamiales: Lamiaceae) (Mediterranean thyme), Plantago lanceolata L. (Lamiales: Plantaginaceae) (ribwort plantain) and Rosmarinus officinalis L. (Lamiales: Lamiaceae) (Rosemary), for controlling of Meloidogyne incognita (Kofoid & White, 1919) Chitwood, 1949 (Tylenchida: Meloidogynidae) was examined. The experiments were conducted twice with four replicates under controlled conditions at the Laboratories of Plant Protection Central Research Institute of the Ministry of Agriculture of Turkish Republic in Ankara, Türkiye in 2020. The extracts were prepared at 1.2, 2.5 and 5%. The egg mass number, plant height, fresh and dry plant weight, and fresh and dry root weight of each plant were evaluated in the pot trials. The lowest number of in egg masses was with T. spicata (100 ± 2.3) followed by R. officinalis then P. lanceolata with (104 ± 2.6) and (113 ± 2.1). The least effect was observed at 1.2% concentration of P. lanceolata (217 ± 5.5).