الفهرس 
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Abstract
Pest control is a very necessary process to control pests that attack crop during production stages to adequate food production and conservation, so this investigation was carried out to study the behavior of diniconazole, etoxazole and thiamethoxam pesticide residues in broad bean and green bean. It may be effective in controlling this pest, persisting, not long enough to cause residue problems in the harvested plants. Also this work aimed to study the stability of those tested pesticides under some of the environmental factors such as exposure to the direct sunlight, short UV-rays and different temperature degrees.
The results of the present work could be summarized as follows:
5.1- Persistence of diniconazole residues in and on broad bean (pods, peels and seeds) and green bean pods :
5.1.1- Broad bean:
Data declared that The initial deposit which remained on pods one hour after treatment was 0.262 mg kg-1, this amount dropped to 0.174 mg kg-1 one day after application indicating a loss rate of 33.58 %. The data indicated that residue loss was found to be continued on prolonging the time, where the residue of diniconazole in and on pods of broad beans gradually decreased to 0.108, 0.071, 0.033, 0.007, and 0.004 mg kg-1 indicated loss rates of 58.77, 72.90, 87.40, 97.32 and 98.47 %, respectively after 3, 5, 7, 9 and 14 days of the treatment, while residues at harvest day were below the estimated detection limit of diniconazole 0.007 mg kg-1. The half-life value was 2.46 day from application.
Data showed that the residues of diniconazole residues in and on peels were 0.44 mg kg-1, decrease to 0.259 mg kg-1 indicating loss rate of 41.14 % after one day of the treatment. Residue levels decreased to 0.175, 0.092, 0.055, 0.022 and 0.004 mg kg-1 indicating loss rates of 60.23, 79.09, 87.50, 95 and 99.09 % after 3, 5, 7, 9 and 14 days of the application, respectively. Residues were below the estimated detection limit of diniconazole at harvest day (28 days after application). The half-life value was 2.29 days after the treatment.