Weed Ecology and Management in Florida Potato (Solanum tuberosum L.) Production

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Material Information

Title:
Weed Ecology and Management in Florida Potato (Solanum tuberosum L.) Production
Physical Description:
1 online resource (60 p.)
Language:
english
Creator:
Rouse, Christopher E
Publisher:
University of Florida
Place of Publication:
Gainesville, Fla.
Publication Date:

Thesis/Dissertation Information

Degree:
Master's ( M.S.)
Degree Grantor:
University of Florida
Degree Disciplines:
Horticultural Sciences
Committee Chair:
DITTMAR,PETER J
Committee Co-Chair:
ZOTARELLI,LINCOLN
Committee Members:
MACDONALD,GREGORY E

Subjects

Subjects / Keywords:
control -- distribution -- enumeration -- herbicide -- movement -- seedbank -- weeds
Horticultural Sciences -- Dissertations, Academic -- UF
Genre:
Horticultural Sciences thesis, M.S.
bibliography   ( marcgt )
theses   ( marcgt )
government publication (state, provincial, terriorial, dependent)   ( marcgt )
born-digital   ( sobekcm )
Electronic Thesis or Dissertation

Notes

Abstract:
Two studies were conducted for the purpose of this thesis:the first investigated the movement of weeds in seepage irrigated potato fields and the second developed new herbicide programs for weed control in potato.  Sub- surface seepage irrigation is the primary means by which potato is irrigated in Florida. In 2012 and 2013,a study was conducted to quantify weed population distribution and movement from the irrigation furrows and the start of the crop row, into potato crop fields. In-field weed counts and greenhouse weed seedbank enumeration were used to quantify weed populations and seedbank densities of four commercial potato fields in Flagler County, FL. In- field weed populations were significantly higher at the irrigation furrow and first tier (beginning of the crop row) as compared to the crop rows and all other tiers. Seedbank densities had significantly more weeds than the in-field population counts and the pattern of distribution were more variable. A higher density of weed seeds was often located in the crop rows, not the field edges. In-field weed counts were similar to observations by producers and researchers.  However, in-field counts did not predict the weed seed distribution within the fields. Adjusting seedbank enumeration to include only agronomicaly important weeds resulted in a more accurate representation of in field weed populations.  Experiments to evaluate potato tolerance and weed control of new season- long herbicide programs were conducted in 2012 and 2013 in Flagler County, Florida. Both experiments included fomesafen PRE,S-metolachlor PRE, and imazosulfuron POST; these three herbicides were applied alone and combined at varying rates for fourteen herbicide treatments. A grower standard (metribuzin + pendimethalin) and a nontreated control were also included. Potato crop tolerance trials were completed at the Florida Partnership for Water, Agriculture, and Community Sustainability at Hastings.Potato injury did not exceed 5% in either year and no effects on grade distribution or total yield were observed from any of the herbicides. Weed control studies were conducted at two on-farm locations. Differences in the weed species between years resulted in differences in weed control. In 2012, fomesafen f.b. imazosulfuron or S-metolachlor f.b. imazosulfuron had greater control of all species as compared to the nontreated control and the grower standard.  The POST application of imazosulfuron prolonged control following the PRE herbicides resulting in sustained weed control throughout the season.  In 2013, fomesafen and S-metolachlor provided similar control of the large crabgrass,however, no additional control from imazosulfuron. An herbicide program, which includes S-metolachlor or fomesafen PRE, and imazosulfuron POST is important for season long control of susceptible weeds with excellent potato tolerance.
General Note:
In the series University of Florida Digital Collections.
General Note:
Includes vita.
Bibliography:
Includes bibliographical references.
Source of Description:
Description based on online resource; title from PDF title page.
Source of Description:
This bibliographic record is available under the Creative Commons CC0 public domain dedication. The University of Florida Libraries, as creator of this bibliographic record, has waived all rights to it worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law.
Statement of Responsibility:
by Christopher E Rouse.
Thesis:
Thesis (M.S.)--University of Florida, 2013.
Local:
Adviser: DITTMAR,PETER J.
Local:
Co-adviser: ZOTARELLI,LINCOLN.
Electronic Access:
RESTRICTED TO UF STUDENTS, STAFF, FACULTY, AND ON-CAMPUS USE UNTIL 2014-12-31

Record Information

Source Institution:
UFRGP
Rights Management:
Applicable rights reserved.
Classification:
lcc - LD1780 2013
System ID:
UFE0046331:00001