Bio-efficacy of fenazaquin 10 EC against two spotted spider mite, Tetranychus urticae Koch. (Acari: Tetranychidae) in tomato

A field trial was conducted at the Central Research Station Farm, Orissa University of Agriculture & Technology, Bhubaneswar during winter seasons of 2008–09 and 2009–10, using tomato variety “Arka Vikas” to test the bio-efficacy of fenazaquin 10EC against two spotted spider mite, Tetranychus urticae Koch. The results revealed that fenazaquin at 125 and 150 g a.i./ha registered significantly lowest mite population (3.5–4.8/4 cm² leaf area) followed by dicofol at 250g a.i./ha at 10 days after spraying (DAS) during both the years of study. The highest population reduction was achieved (90.27–92.13%) with fenazaquin at 125-150g a.i./ha followed by dicofol at 250g a.i./ha and fenazaquin at 100g a.i./ha (76.40–76.81%) compared to control. Plots receiving fenazaquin at 125 and 150g a.i./ha treatments recorded significantly highest fruit yield (18.9–19.2 t/ha) which was 30.0–32.1 per cent more than control (14.5 t/ha). The selectiveness and safety of fenazaquin to predatory phytoseiid mites was observed at all doses evaluated.