Abstract/Details

Herbicide-based weed management systems for potato and wheat and growth and reproductive characteristics of smooth pigweed


2002 2002

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Abstract (summary)

Integrated weed management involves the utilization of weed biology principles to develop effective and economical control strategies. Research was conducted to investigate the potential for use of the phenyl triazolinone herbicide sulfentrazone in potato, the experimental sulfonylurea herbicide combination AE F130060 03 in wheat, and the growth and reproductive characteristics of smooth pigweed, a troublesome species in several crops. In potato experiments in the field, potato tolerance to preemergence (PRE) applications of sulfentrazone at rates up to 0.21 kg/ha was similar to that from the registered herbicides metribuzin, metolachlor, or metribuzin plus metolachlor PRE. Sulfentrazone controlled common lambsquarters (Chenopodium album L.) at rates as low as 0.11 kg/ha and several annual grasses at higher application rates, but was slightly less effective on jimsonweed (Datura stramonium L.) and ineffective on common ragweed (Ambrosia artemisiifolia L.). Laboratory research was conducted to determine the mechanism of sulfentrazone selectivity between potato (a tolerant species), common lambsquarters (a sensitive species), and jimsonweed (an intermediate species). After 48 h root exposure to [14C] sulfentrazone, common lambsquarters absorption was nearly two-fold that of jimsonweed and nearly three-fold that of potato. Both weed species exhibited nearly a two-fold increase in sulfentrazone translocation from roots to shoots compared to potato. Since the site of action of sulfentrazone, protoporphyrinogen oxidase, is located primarily in shoot tissue, translocation to shoots is essential for sulfentrazone toxicity. Therefore, the proposed primary mechanisms of selectivity between these species are differential root absorption and differential translocation. In wheat experiments in the field, AE F 130060 03 was as effective as diclofop-methyl for control of diclofop-sensitive Italian ryegrass (Lolium multiflorum Lam.), and more effective than all herbicides tested for control of diclofop-resistant Italian ryegrass. Postemergence AE F130060 03 applications controlled Italian ryegrass from emergence until the end of tillering, but applications made to four- to five-tiller Italian ryegrass usually resulted in the least amount of new Italian ryegrass emergence following application. (Abstract shortened by UMI.)

Indexing (details)


Subject
Botany;
Agronomy
Classification
0817: Botany
0285: Agronomy
Identifier / keyword
Biological sciences; Herbicides; Potato; Reproductive; Smooth pigweed; Weed management; Wheat
Title
Herbicide-based weed management systems for potato and wheat and growth and reproductive characteristics of smooth pigweed
Author
Bailey, William Anthony
Number of pages
203
Publication year
2002
Degree date
2002
School code
0247
Source
DAI-B 65/06, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
Advisor
Wilson, Henry P.
University/institution
Virginia Polytechnic Institute and State University
University location
United States -- Virginia
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
3136593
ProQuest document ID
305489448
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/305489448
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