Activity of Fosthiazate Against Root-Knot Nematode, Meloidogyne incognita (Kofoid & White) Chitwood (Nemata: Heteroderidae) on Tomato and Pepper in Greenhouse Conditions

Plant-parasitic nematodes (PPNs) are recognized as highly damaging obligate parasites, causing significant reductions in crop yield and quality. Nematicides, which are chemical agents, are employed to enhance crop yield by managing PPNs. Fosthiazate, scientifically known as [O-ethyl S-(methylpropyl) (2-oxo-3-thiazolidinyl)-phosphonothioate], represents a novel organothiophosphate compound proven effective against various nematodes, including potato cyst nematodes (CNs), root-knot nematodes (RKNs), and others. Its mode of action involves targeting the nervous system of the specific nematode pests, inhibiting acetylcholinesterase (AChE), and disrupting normal nerve impulse conduction. In Türkiye, the fosthiazate is registered against RKNs (Meloidogyne spp.) in several vegetable crops. This study was conducted to investigate the activity of Tripp 900EC (900 g L-1 Fosthiazate) against Meloidogyne incognita (Kofoid & White) Chitwood (Nemata: Heteroderidae) on tomato and pepper in greenhouse conditions. The Tripp 900 EC (900 g L-1 Fosthiazate) proved to be an effective treatment that inhibited M. incognita population by 91.2% and 94.6% on tomato and pepper, respectively. Furthermore, gall formation on the tomato and pepper dropped after Fosthiazate treatment following Fluopyram by 88.5% and 86.2%, respectively. The results indicate that fosthiazate has great potential in controlling M. incognita in greenhouse tomato and pepper cultivations.