"Effect of 2, 4-D Amine and 2, 4 -D Ester on Sphenoclea Zeylanica Gaertn. at Different Growth Stages"

Date

5-1980

Degree

Bachelor of Science in Agriculture

Major Course

Major in Agronomy

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Enrique C. Paller Jr.

Abstract

The effect of 2,4-D amine and 2,4-D ester on various growth stages of Sphenoclea zeylanica. Was studied in a pot experiment conducted at the Weed Science Division, Department of Agronomy, University of the Philippines at Los Baños, to obtain information in establishing important guidelines for its effective control.

Plants sprayed at 5-8 and 8-11 leaf stages exhibited greater percent reduction in shoot and root dry weights than those applied with the herbicide at the later stages.

The weed seedlings treated with ester formulation had significantly lower shoot dry weight than those treated with the amine formulation.

Plants that were sprayed with the herbicide at the 5-8 and 8-11 leaf stages exhibited more injury than those applied at the 12-16 and 16-22 leaf stages at comparable herbicide rates.

The results of the experiment showed that S. zeylanica can be controlled at early stage of growth with the recommended rate for the control of broadleaf weed in lowland rice. At the later stages, the required rates may result to injury to crop.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 1980 A42 P34

Document Type

Thesis

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