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- W2385745867 abstract "Eesults from the laboratory and field experiments carried out in 1979-1980 showed that Decis performed outstanding effectiveness against lepidopterous larvae and jassids infecting tea. Its LD50 and LD95 to mature larvae of the tea looper caterpillar Ectropis obliqua Warren were 4.95±0.11 ng/g and 25.12±1.45 ng/g respectively. In the field conditions, Decis degraded very slofwly on teashoots, and was even more slower than Permethrin. The penetrating ability of Decis was also relatively weak. When used at 0.44-0.73 g a.i. per mμ (2.5% EC 6000-10000 dilutions), the half life (HI50) of Decis in fresh leaves and made tea was 2.8 days together (calculated with the initial deposit). Weather conditions showed slight influences. Owing to the low vapour pressure, the degradative rate of the residues of Decis in the course of tea manufacture was relatively low (29.79% in average). The extractive percentage of Decis residues in made tea with infusion procedure was lower than 1%.Based on the no-effect level value reported by Eousell Uclaf Ltd. in France, the authors propose the permitted residue limit in the made tea to be 2 ppm. According to this limit, the safety interval should be 3 days after the use of 1:6000-10000 dilute solutions of 2.5% EC Decis. If it was applied with the low-volume or ultra low-volume spraying methods, the safety interval should be delayed to 5 days." @default.
- W2385745867 created "2016-06-24" @default.
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- W2385745867 date "1983-01-01" @default.
- W2385745867 modified "2023-09-25" @default.
- W2385745867 title "DEGRADATION OF PYRETHROID DECIS (NRDC 161) ON TEA-SHOOTS" @default.
- W2385745867 hasPublicationYear "1983" @default.
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