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

Abstract

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.

Keywords

• Fosthiazate
• management
• plant parasitic nematodes
• crops

Fosthiazate'in Sera Koşullarında Domates ve Biberde Kök-ur nematodu, Meloidogyne incognita (Kofoid & White) Chitwood (Nemata: Heteroderidae)’ya Karşı Etkinliği

Öz

Bitki paraziti nematodlar (BPN), tarımsal ürünlerin veriminde ve kalitesinde önemli düşüşlere neden olan oldukça zararlı zorunlu parazitler olarak kabul edilmektedir. Nematisitler, BPN’leri kontrol altına alarak ürün verimini artırmak için kullanılmaktadır. Bilimsel olarak [O-etil S-(metilpropil) (2-okso-3-tiyazolidinil)-fosfonotiyoat] olarak bilinen Fosthiazate, patates kist nematodları (PKN), kök ur nematodları (KUN) ve diğer BPN’ler dahil olmak üzere çeşitli nematodlara karşı etkili olduğu kanıtlanmış yeni bir organik fosfor bileşiğidir. Etki şekli, belirli nematod zararlılarının sinir sistemini hedef almayı, asetilkolinesterazı (AChE) inhibe etmeyi ve normal sinir uyarı iletiminin bozulmasını içerir. Türkiye'de fosthiazate, çeşitli sebze ürünlerinde KUN’larına (Meloidogyne spp.) karşı ruhsatlıdır. Bu çalışma, Tripp 900EC'nin (900 g L-1 Fosthiazate) sera koşullarında domates ve biberde KUN’a, Meloidogyne incognita (Kofoid & White) Chitwood (Nemata: Heteroderidae)’ya karşı etkinliğini araştırmak amacıyla yürütülmüştür. Tripp 900EC (900 g L-1 Fosthiazate), M. incognita popülasyonunu domates ve biberde sırasıyla %91.2 ve %94.6 oranında inhibe eden etkili bir uygulama olduğunu kanıtlamıştır. Ayrıca domates ve biberde gal oluşumu Fluopyram'ı takiben Fosthiazate uygulamasından sonra sırasıyla %88.5 ve %86.2 oranında azalmıştır. Sonuçlar, fosthiazatın serada domates ve biber yetiştiriciliğinde M. incognita'yı kontrol altına almada büyük potansiyele sahip olduğunu göstermektedir.

Anahtar Kelimeler

• Fosthiazate
• mücadele
• bitki paraziti nematodlar
• mahsuller

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