Studies on abamectin pesticide residues in horticultural crops
2011
Ahmed, K.R.A.
The present study planned to investigate the following points: (I) 1. Persistence of abamectin residues on and in cucumber, orange and strawberry fruits. . 2. Determination of the dissipation rates, half-life values and pre-harvest intervals (PHI) for abamectin. 3. Investigate the effect of home processing on the removal of the abamectin residues from treated crops. 4. Investigate the impact of some environmental factors i. e., different degrees of temperature, ultra-violet light and sun light on the persistence of abamectin. Field experiments were carried out to study the residual behavior of abamectin on orange; strawberry and cucumber. The effect of household processing (peeling and squeezing for orange and washing for strawberry and cucumber) were studied. The used pesticide (abamectin) in the field dissipated gradually and disappeared completely after 12, 14 and 9 days for orange, strawberry and cucumber, respectively. The half-life time for abamectin was calculated to be 3.93, 6.16 and 2.2 days for orange, strawberry and cucumber, respectively. The three crops can be harvested safely (PHI) after 9, 10 and 6 days for orange, strawberry and cucumber, respectively. The household processing was found to be effective on the dissipation of the used pesticide especially peeling and squeezing in orange, the pesticide was not detected after these two processes. Washing with running tap water was also effective in strawberry and cucumber, as it reduces the pesticide gradually until the pesticide dissipated completely after 11 and 6 days, respectively.
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