Effect of Time and Rats of Naptalam Application on Shoot and Tuber Production of Purple Nutsedge ( Cyperus Rotundus L.)

Date

3-1980

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

A pot experiment was conducted to study the influence of time and rate of application of naptalan (N-1-napthylphalamic acid) on shoot and tuber production of purple nutsedge (cyperus rotundus L.)

The time of naptalem application significantly affected serial shoot and tuber production, the number of sprouted tubers, rhizome production and dry weights of aerial shoots and tubers. Premergence of the herbicide inhibited the growth of C. rotundus but application at 1 and 2 weeks after emergence resulted in progressive increase in the number of serial shoots, tubers, rhizomes and sprouted tubers.

The rate of naptalan application significantly affected aerial shoot production, sprouting of tubers and dry weights of aerial shoots and tubers. The lowest number of aerial shoots occurred in the untreated plants. Significantly, more shoots were produced as the herbicide rate was increased up to 8.0 kg/ha. However, aerial shoots produced by plants that received proemergence application of the herbicide and the untreated check. However, high rates of application of neptalam at 1, 2 and 3 weeks after emergence resulted in significantly more aerial shoots.

Number of sprouted tubers was also affected by rate and time of naptalam application. Preemergence application resulted in the least number of sprouted tubers. No significant differences in the number of sprouted tubers occurred at the different herbicides rates at 1 and 3 weeks after emergence. The application of 4.0 and 8.0 kg/ha of the herbicide 2 weeks after emergence resulted significantly more sprouted tubers than the untreated check.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 1980 A42 M46

Document Type

Thesis

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