Efficacy of Newer Insecticides Against Whitefly, Bemisia tabaci (Hemiptera: Aleyrodidae) on Cotton
Year: 2021
Type: article
Abstract: The study aimed to evaluate the comparative efficacy of six newer insecticides as a foliar application against the whitefly, Bemisia tabaci on cotton variety CO17 in two seasons’ field experiments from december 2020 to july 2021 at Department of Cotton, Tamil Nadu Agricultural University, Coimbatore. Insecticides were sprayed when the whitefly population reached the economic threshold level (ETL) i.e., 4-5/3 leaf. The results revealed that flonicamid 50% WG @ 75 g a.i. ha-1 recorded 81.99 % reduction in mean population of whiteflies after three rounds of spray at fifteen days interval. The order of relative efficacy of test insecticides based on the mean population of whiteflies were, flonicamid 50% WG 75 g a.i. ha-1 > dinotefuran 20% SG @ 25 g a.i. ha-1 > clothianidin 50% WDG @ 25 g a.i. ha-1 > thiamethoxam 25 % WG @ 50 g a.i. ha-1 > pyriproxyfen 10% EC @ 50 g a.i. ha-1 >diafenthiuron 50% WP @ 300 g a.i. ha-1 > untreated control. Flonicamid 50% WG @ 75 g a.i. ha-1 recorded increased yield of 2380 kg ha-1 and 2040 kg ha-1 over untreated control (1865 kg ha-1 & 1570 kg ha-1) in first and second experiment, respectively.
Source: Madras Agricultural Journal
Authors: Sadhana V, Senguttuvan K, Murugan M, Sathiah N
Language: English
Subfield: Insect Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W3208105381