Main Page
Faculty
About the Faculty
Dean Message
Administration
Administration Hierarchy
Faculty Associations>
Saudi Society for Environmental Scienes
Saudi Society of Meteorology
Faculty Labs >
Central Lab
Faculty Film
Departments
Meteorology
Environmental Sciences
Arid Land Agriculture
Hydrology and Water Resources Management
Graduate Studies
Regulations and Guidelines
Graduate Programs
Graduate Studies
Graduate Program >
Department of Meteorology >
Master's in Meterology
Master in Meterology
Department of Environment >
Master of Environment
Doctor of Occupational Hygiene
Doctor of Food Safety and Hygiene
Doctor of Water Pollution
Doctor of Air Pollution and Meteorology
Department of Agriculture >
Master of Animal Production
Master groves
Master and crop protection
Master of Field Crops and Soil
Master of Horticulture
Master of Natural Resources
Master of other decisions
Ph.D. Animal Production
Ph.D. orchards
Doctor of natural resources
PhD Field Crops and Soil
Ph.D. and crop protection
Ph.D. other decisions
Department of Hydrology >
Master of Hydrology
PhD
International Cooperation
Units
Unit of Assessment and Academic Accreditation
The Applications of Systems Quality Unit
Students Activities
Students Activities
Researchs
Files
Courses
Employees
Subjects
Awards
Site Contents
Favorite Links
PhotoAlbum
Latest News
Contact With Us
Contact Us
Faculty Map
Our Contacts
عربي
English
About
Admission
Academic
Research and Innovations
University Life
E-Services
Search
Faculty of Environmental Sciences
Document Details
Document Type
:
Article In Journal
Document Title
:
Residues of pirimiphos-methyl and fenitrothion in grapes, their effect on some quality properties and their dissipation during the removal and processing methods
متبقيات البيرموفوس والفنتروثيون فى العنب وتأثير ذلك على بعض خصائص الجودة واختفائهم خلال طرق الازالة والتصنيع
Document Language
:
English
Abstract
:
Residues of pirimiphos_methyl and fenitrothion in grapes, their effect on some quality properties and their dissipation during the removal and processing Abstract: The persistence patterns of the two organophosphorus insecticides; pirimiphos_methyl and fenitrothion in leaves and fruits of grapes in relation to their effects on some internal quality properties were studied. In addition, the elimination of the two insecticide residues contaminating grapes through the use of washing or home processing methods was also investigated. The results showed that waiting period of 21 days after application on grapes is enough to reduce the pirimiphos_methyl or fenitrothion residues to below the maximum residue limits (MRL). However, pirimiphos_methyl appeared longer persistent with t ½ of 5.4 and 4.4 days than fenitrothion with t ½ 3.2 and 2.8 days for fruits and leaves, respectively. Results also showed that washing treated fruits with any of the tested washing of solutions removed considerable amounts of such residues. Blanching of grape leaves, removed 77.19% and ≈100% of the initial residues of pirimiphos_methyl and fenitrothion, respectively. Grape processing into raisins or juice caused almost complete residue reduction (≈100% removal for each insecticide). As for the internal quality parameters of grape fruits, the tested insecticides had significantly increased % soluble sugars. pirimiphos_methyl significantly increased % acidity, decreased pH of the grape juice and did not produce any significant effect on the % fatty acids. On the other hand, fenitrothion significantly decreased % acidity and also did not cause any effect on the tested fatty acids excpt linoleic acid in grape fruits which was increased
ISSN
:
1110-7308
Journal Name
:
Journal of pest control and environmental sciences
Volume
:
9
Issue Number
:
3
Publishing Year
:
1422 AH
2001 AD
Article Type
:
Article
Added Date
:
Sunday, August 21, 2011
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
محمد حمد شيبوب
Shiboob, Mohamed Hamad
Researcher
Doctorate
mshiboob2010@hotmail.com
Files
File Name
Type
Description
31675.pdf
pdf
Back To Researches Page