Vol. 10, Issue 11 (2021)

Author(s):
Katta Swathi, CH Raja Goud, D Laxmi Narayana and T Suresh Kumar

Abstract:
A field investigation entitled “Bio-efficacy studies on selected insecticides against lepidopterous pests in tomato (Solanum lycopersicum L.).” was carried out during the Rabi season of the year 2020-21 at farmer field of Chervupally (village), Madgulapally (Mandal), Nalgonda (District), Telangana State. The experiment was laid out in Randomized Block Design with nine treatments and replicated thrice viz., T₁ (Flubendamide 480 SC @ 2.5 ml 10 l^-1) T₂ (Emamectin benzoate 5 SG @ 0.4 g l^-1) T₃ (Chlorantrinilprole 18.5% W/W SC @ 0.4 ml acre^-1) T₄ (Novaluron @ 10%EC (1 ml l^-1)) T₅ (Fluvalinate @ 25% EC (1ml l^-1)) T₆ (Beauveria bassiana @ 2 g l^-1); T₇ (Metarhyzium anisopliae @ 2 g l^-1); T₈ (Neem oil @ 3000ppm); T₉ control. The results revealed that among the selected insecticides T₃ (Chlorantrinilprole 18.5% W/W SC @ 0.4 ml acre^-1) recorded significantly maximum fruit yield (56.48 T/ha) with the lowest larval population of Tuta absoluta (0.73, 0.55), Helicoverpa armigera (1.09, 0.70), Spodoptera litura (1.93, 1.17), cut worms (0.01, 0.11) per plant and highest number of (natural enemies) Coccinellids (4.70, 5.64), Spiders (5.26, 5.25) observed per plant after first & second sprays.