Acephate and methamidophos residue behavior in Florida citrus, 1976.
The half-life of acephate and its hydrolysate, methamidophos, in the rind of Temple and Valencia oranges, and grapefruit, lemons, and tangerines was 10.3 days and 10.5 days, respectively. Half-lives of acephate and methamidophos in citrus pulp were 15.0 days and 6.1 days, respectively based on 7-, 14-, and 21-day data. Seven days after treatment, acephate and methamidophos reached maximum levels in rind and pulp. Acephate residue levels in rind were less than 3.0 ppm 14 days after treatment; acephate residues in pulp were less than 3.0 ppm throughout the experiment. Methamidophos residue levels averaged less than 0.25 ppm after 21 days.
D000042:Absorption; D002957:Citrus / Q000032:analysis*; D005431:Florida; D006207:Half-Life; D007306:Insecticides / Q000032:analysis*; D009946:Organothiophosphorus Compounds; D010573:Pesticide Residues / Q000032:analysis*; D063088:Phosphoramides; D013045:Species Specificity; D013997:Time Factors
D007306:Insecticides; D009946:Organothiophosphorus Compounds; D010573:Pesticide Residues; D063088:Phosphoramides; C001969:acephate; C014655:methamidophos