Bio-efficacy of Certain Insecticides Sequence on Cotton Sucking Pests and Pink Bollworm

Abstract

The field trials were conducted for two consecutive years during kharif, 2018 and 2019 seasons in the Regional Agricultural Research Station, Warangal, Telangana, India. The susceptible hybrid RCH-2 was grown during both the years of study. Among the treatments, significant (25.4%) reduction of aphids was recorded in neem oil, clothianidin and flonicamid sequential spray. The sequence chlorpyriphos, flonicamid and clothianidin achieved superior efficacy against jassids with 32.3% reduction over control during the two seasons. The highest reduction (25.2%) of thrips was observed in neem oil, clothianidin, flonicamid sequential spray. The incidence of whitefly was low during the experimental period, however, the highest white fly reduction (15.0%) was observed in chlorpyriphos, flonicamid, clothianidin spray. The lowest number of PBW larvae per 10 green bolls was observed in profenophos, spinetoram, chlorpyriphos+cypermethrin sequential spray that reduces up to 61.9% incidence. The lowest number of (38.5) damaged locules per 100 fully opened bolls were observed in profenophos, spinetoram, chlorpyriphos+cypermethrin sequential spray. But, the highest seed cotton yield (1414 kg ha-1) as well as benefit cost ratio (1.02) was recorded in chlorpyriphos, flonicamid, emamectin benzoate, clothianidin, indoxacarb+acetamiprid sequential spray. The study further revealed that, initial control of sucking pests menace especially jassid was crucial in deciding the cotton yield as compared to later stage pink bollworm menace. During both the years, it was noticed that during peak incidence of jassid, the treated plot with flonicamid against jassid in first instance had given highest seed cotton yield.

Direction and Export Performance of Coffee in India

“…Among the coffee varieties, Robusta cherry occupied the largest share (40.03%), followed by Instant (32.28%), Plantation coffee (14.14%), Robusta cherry (8.12%) during 2016-17. The share of Arabica cherry coffee was only restricted to 5.17% due to increase in white stem boror infestation (Kumar et al 2019, Cole and Brown, 2014, Prasad and Ashwini, 2021. Many studies (Ashoka et al, 2016, Dragusanu et al, 2014, Woodill et al, 2014 conducted the research on the growth and performance of coffee and leads on the similar conclusion.…”

Investigation on the Effectiveness of Botanicals and New Generation Insecticides in the Management of the Pink Bollworm, Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae), in the Cotton Ecosystem

“…In Telangana, field trials were conducted for two consecutive years during Kharif, 2018-20. The maximum seed cotton yield (1414 kg/ ha) was recorded in chlorpyriphos, flonicamid, emamectin benzoate, clothianidin, indoxacarb+acetamiprid sequential spray (Prasad and Ashwini 2021).…”

Population dynamics of arthropods under different insecticide and biopesticide treatments in okra

“…Among these pesticide mixtures thiamethoxam + lambda-cyhalothrin provided highest level control of stink bugs. Parsad and Ashwini (2021) reported that neem oil, chloropyriphos and flonicamid significantly reduced the population of sucking pests infesting cotton crop in Telangana, India.…”