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  • Title: Rate of degradation of lambda-cyhalothrin and methomyl in grapes (Vitis vinifera L.).
    Author: Banerjee K, Upadhyay AK, Adsule PG, Patil SH, Oulkar DP, Jadhav DR.
    Journal: Food Addit Contam; 2006 Oct; 23(10):994-9. PubMed ID: 16982521.
    Abstract:
    Rates of degradation of lambda-cyhalothrin and methomyl residues in grape are reported. The dissipation behavior of both insecticides followed first-order rate kinetics with similar patterns at standard and double-dose applications. Residues of lambda-cyhalothrin were lost with pre-harvest intervals (PHI) of 12.0-12.5 and 15.0-15.5 days, corresponding to the applications at 25 and 50 g a.i. ha-1, respectively. In the case of methomyl, residues were lost with PHI of 55.0 and 61.0 days, following applications at 1 and 2 kg a.i. ha-1, respectively. The PHI, recommended on the basis of the experimental results, was shown to be effective in minimizing residue load of these insecticides below their maximum residue limits (MRLs) in vineyard samples.
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