Decline behavior of diuron [3- (3,4-Dichlorophenyl)-1, 1- Dimethylurea] in three different soil types

Date

4-2003

Degree

Bachelor of Science in Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Leonila M. Varca

Abstract

ABSTRACT

NAVARRO, KATE LESLIE ANN C. College of Arts and Sciences. University of the Philippines Los Banos. April 2003. Decline Behavior of Diuron [3-(3,4-dichlorophenyl)-1,1-dimethylurea] in Three Different Soil Types.

Thesis Adviser: Dr. Leonila M. Varca

Diuron, [3-(3,4-dichloropheny1)-1,1-dimethylurea], is a pre-emergence herbicide used mostly in crop areas. The decline behavior of diuron in three different soil types was determined in a simulated laboratory set-up.

Soil plots were made and diuron was applied by spraying at a recommended rate of 3.2 kg active ingredient per hectare. An 80% wettable powder formulation of diuron was used (Karmex). Collection of soil samples was done randomly with the following sampling intervals: 0, 3, 7, 14 and 28 days after treatment. The three soil samples are clay soil from Pagsanjan, clay-loam soil from Lumban and loam soil from Liliw.

Decline of diuron was observed in the three soil types. The half-life of diuron is independent of the initial concentration of the applied formulation. The half-lives of diuron are 13.8, 18.0 and 18.4 days in clay, clay-loam and loam soils, respectively. Decline of diuron was most rapid in the clay soil sample, followed by the clay-loam soil sample, then by the loam soil sample.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2003 C4 N383

Document Type

Thesis

This document is currently not available here.

Share

COinS