Document Type

Thesis - Open Access

Award Date

1967

Degree Name

Master of Science (MS)

Department

Agronomy

Abstract

Infestation of wild buckwheat (Polygonum Convolulus L.) presents a serious problem on many acres of agricultural land, especially in the spring wheat growing areas. Wild buckwheat is an annual, the seeds of which germinate at the same time as the spring-sown wheat. The weed climbs on the wheat plant and is not effectively shaded by the crop. Wild buckwheat is not effectively controlled with phenoxy type herbicides. The most susceptible stage of growth for the wheat is the 5-leaf to early boot stage. Since the susceptible stage for the weed has passed before the crop reaches its tolerant stage, control of the weed is not very efficient. A better understanding of the effects of the weed on the components of yield and of the length of time required for these effects to become great enough to reduce yield should aid in devising better control measures, timing of control measures, and determining the amount of weed control required to reduce losses to a minimum. The purpose of this study are (1) to study the effect of different durations of competition of P. Convolvulus L. on spring wheat and (2) to study the effect of different intensities of competition of P. Convolvulus L. on spring wheat and (3) to study the effect of different levels of fertility on competition of P. Convolvulus L. with spring wheat.

Library of Congress Subject Headings

Wheat
Buckwheat

Format

application/pdf

Publisher

South Dakota State University

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