Persistence and Dissipation of Readymix Formulations of Insecticides In/On Okra Fruits

Abstract

Dissipation behaviour of ready mix polytrin C 44EC (profenophos 40% + cypermethrin 4%) and spark 36EC (triazophos 35% + deltamethrin 1%) applied at 1 L/ha in okra crop during Kharif in year 2000 was studied at 0, 1, 3, 5 and 7 days after treatment. Dissipation on 7th day was found to be maximum (98.4%) for profenophos followed by triazophos (86.2%), cypermethrin (73.5%) and deltamethrin (55.7%). Half life (t1/2) values for the above insecticides were 1.35, 2.55, 4.11 and 7.60 days, respectively. All the insecticides followed a first order kinetics. Profenophos and triazophos followed a biphasic dissipation pattern with faster dissipation in phase I (0-1 days) and manifesting slower rate of dissipation in phase II (1-7 days).

Dissipation of cypermethrin, chlorpyriphos, and profenofos in tomato fruits and soil following application of pre-mix formulations

“…5). Dissipation behavior of cypermethrin in premix formulation Polytrin-C on okra crop has been studied earlier Nath et al 2005). They have reported the half-life of 3.95-4.11 days for cypermethrin which is comparable to the half-life values of 2.0-4.8 days observed in this study with Roket 44EC and Action-505EC formulations.…”

“…Profenofos residues dissipated with the half-life of 2.2-5.4 days. The half-life values of 1.35 days on okra using pre-mix formulation Polytrin-C Nath et al 2005), 1.84, 1.74, and 1.96 days from hot pepper, sweet pepper, and eggplant (Radwan et al 2005) have been reported earlier. Chlorpyriphos residues on tomato dissipated with the half-life of 2.9-3.3 days.…”

Investigation of Dissipation, Adsorption, Degradation, and Leaching of Triazophos Pesticide in Various Soils

“…It is an abstemiously poisonous, broad spectrum, non systemic contact OPs, insecticide, and acaricide with nematicidal properties (10,11). Since the late 1970s it has been used in agronomy practices for a number of crops such as vegetables, fruits, cotton, maize, paddy, wheat, and cereals to control aphids, fruit borers, bollworms, red spiders, leaf hoppers and cutworms (12)(13)(14)(15)(16).…”

Effects of triazophos on biochemical substances of transgenic Bt rice and its nontarget pest Nilaparvata lugens Stål under elevated CO2

“…The concentrated samples were transferred to a flask, and APEM was added to achieve a volume of 5 ml for the GC analysis. The GC analysis used a combination of published methods [5,8]. The triazophos residues were estimated using a GC machine (Model HP-5890 II) equipped with a SGE BPX50 column (50% phenyl equivalent polysilphenylene-siloxane; 30 m  0.53 mm i.d  0.5-lm film thickness).…”

“…It is used to control aphids, bollworms, red spiders, fruit borers, leaf hoppers and cutworms on a variety of crops and is particularly effective in the control of plant nematodes [3][4][5][6][7][8]. The brown planthopper (BPH), Nilaparvata lugens Stål (Hemiptera: Delphacidae), is a major insect pest of rice in Asia.…”