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Degradation Dynamics of Propineb (Antracol 70 WP) in Onion and Soil

机译：Propineb（Antracol 70 WP）在洋葱和土壤中的降解动力学

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摘要

A supervised field trial was conducted on onion with propineb (Antracol 70WP) @ 1225 and 2450 g ai ha~(-1), applied thrice at 10 days interval. Propineb residues were estimated spectrophotometrically at 435 nm in terms of CS2. The limit of quantification (LOQ) of propineb was found to be 0.2 mg kg~(-1) for green onion leaves, immature and mature onion bulb. The initial deposit of propineb in green onion leaves ranged from 5.34-11.72 mg kg~(-1) for lower and higher doses, respectively, and dissipated by 95% within 10 days. The half-life value were ～2.3 days on green onion leaves and 2.8-2.9 days in soil. Considering the MRL value of 0.5 mg kg~(-1), the calculated safe waiting period was found to be 8.6 days (green onion leaves). No residue above LOQ could be quantified in immature onion bulb and mature onion bulb. Thus, propineb can be safely recommended in onion for the consumption of mature and immature onion bulb.
机译：在洋葱上用1225和2450 g ai ha〜（-1）的propineb（Antracol 70WP）在洋葱上进行了现场试验，每隔10天施用三次。根据CS2，在435 nm处用分光光度法估算了Propineb残留。发现大葱叶，未成熟和成熟洋葱鳞茎中丙胺定的定量限（LOQ）为0.2 mg kg〜（-1）。较低剂量和较高剂量下，丙烷叶片在葱叶中的初始沉积量分别为5.34-11.72 mg kg〜（-1），并在10天内消散了95％。葱叶的半衰期值为〜2.3天，土壤为2.8-2.9天。考虑到最大残留限量为0.5 mg kg〜（-1），计算出的安全等待时间为8.6天（葱叶）。在未成熟洋葱鳞茎和成熟洋葱鳞茎中，没有定量高于LOQ的残留物。因此，可以安全地在洋葱中推荐使用propineb，以食用成熟和未成熟的洋葱鳞茎。

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