Kansara Rohan V, Solanki Vanrajsinh H, Singh Susheel, Chauhan Digvijaysinh
Food Quality Testing Laboratory, N. M. College of Agriculture, Navsari Agricultural University, Navsari 396450, Gujarat, India.
Mega Seed Pulses and Castor Research Unit, Navsari Agricultural University, Navsari 396450, Gujarat, India.
Heliyon. 2021 Apr 6;7(4):e06377. doi: 10.1016/j.heliyon.2021.e06377. eCollection 2021 Apr.
Pigeonpea ( L.) is an annually cultivated food and forage crop, attacked by a large number of pests mainly pod borer (). For the control of this insect pest, a combination of broad-spectrum insecticides chlorantraniliprole and λ-cyhalothrin have been in use to reduce the pod damage and increase crop production worldwide. Therefore, a field trial was conducted to study dissipation and persistence behavior of insecticides combination (Chlorantraniliprole 9.26 % + λ-cyhalothrin 4.63 % ZC) in/on pigeonpea at the recommended dose (RD) 30 g a.i./ha and double recommended dose 60 g a.i./ha (2RD). The quantitative analysis was performed using ultra-high performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS) for chlorantraniliprole and Gas chromatography with electron captured detector (GC-ECD) for λ-cyhalothrin. The Quick, Easy, Cheap, Effective, Rugged and Safe (QuEChERS) method was validated for its accuracy, precision and sensitivity. The chlorantraniliprole persisted upto 30 days and λ-cyhalothrin persisted upto 10 days at RD and 20 days at 2RD. The half-lives (DT) of chlorantraniliprole and λ-cyhalothrin were from 4.95 to 5.78 days and 2.48-4.33 days at recommended and double recommended dose in pigeonpea, respectively. However, residues of both insecticides measured from soil at 30 day and harvest time were below the limit of quantification (LOQ). The waiting period deciphered for chlorantraniliprole and λ-cyhalothrin applied as combi-product was 9 days at recommended dose. Dietary risk assessment (Risk quotient<1) was performed on the basis of field trial suggested the application of chlorantraniliprole and λ-cyhalothrin as combi-product at recommended dose is safe for the consumers.
木豆（Cajanus cajan (L.)）是一种一年生种植的粮食和饲料作物，受到大量害虫的侵袭，主要是豆荚螟（Helicoverpa armigera）。为了防治这种害虫，广谱杀虫剂氯虫苯甲酰胺和高效氯氟氰菊酯的组合已被用于减少豆荚损害并提高全球作物产量。因此，进行了一项田间试验，以研究杀虫剂组合（9.26%氯虫苯甲酰胺 + 4.63%高效氯氟氰菊酯悬浮剂）在木豆上以推荐剂量（RD）30克有效成分/公顷和双倍推荐剂量60克有效成分/公顷（2RD）的消解和残留行为。使用超高效液相色谱串联质谱法（UHPLC-MS/MS）对氯虫苯甲酰胺进行定量分析，使用带有电子捕获检测器的气相色谱法（GC-ECD）对高效氯氟氰菊酯进行定量分析。快速、简便、廉价、有效、耐用和安全（QuEChERS）方法的准确性、精密度和灵敏度得到了验证。在推荐剂量下，氯虫苯甲酰胺残留长达30天，高效氯氟氰菊酯残留长达10天；在双倍推荐剂量下，高效氯氟氰菊酯残留长达20天。在木豆上，氯虫苯甲酰胺和高效氯氟氰菊酯在推荐剂量和双倍推荐剂量下的半衰期（DT）分别为4.95至5.78天和2.48 - 4.33天。然而，在30天和收获时从土壤中测得的两种杀虫剂残留均低于定量限（LOQ）。作为组合产品施用的氯虫苯甲酰胺和高效氯氟氰菊酯的安全间隔期在推荐剂量下为9天。根据田间试验进行的膳食风险评估（风险商数<1）表明，以推荐剂量施用氯虫苯甲酰胺和高效氯氟氰菊酯组合产品对消费者是安全的。
