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You searched for: Author "Haller, William T." Remove constraint Author: "Haller, William T." Journal Weed science Remove constraint Journal: Weed science Subject aquatic weeds Remove constraint Subject: aquatic weeds Text Availability Citation in PubAg Remove constraint Text Availability: Citation in PubAg
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1. Cross-Resistance in Fluridone-Resistant Hydrilla to Other Bleaching Herbicides

Author:
Haller, William T.,   et al.   ; Puri, Atul; Netherland, Michael D.;     Show all 3 Authors
Source:
Weed science 2009 v.57 no.5 pp. 482-488
ISSN:
0043-1745
Subject:
Hydrilla verticillata; aquatic weeds; noxious weeds; fluridone; herbicide-resistant weeds; cross resistance; weed control; topramezone; norflurazon; mesotrione; beta-carotene; chlorophyll; biotypes; plant pigments; chemical constituents of plants; application rate
Abstract:
... The development of fluridone resistance by hydrilla has significantly impacted hydrilla management, and research is ongoing to develop alternate herbicides for effective hydrilla control. We determined the potential cross-resistance in fluridone-resistant hydrilla to other bleaching herbicides norflurazon, mesotrione, and topramezone-methyl. Phytoene, ββ-carotene, and chlorophyll contents as a fun ...
DOI:
10.1614/WS-09-060.1

2. Ploidy Variations in Floridone-Susceptible and -Resistant Hydrilla (Hydrilla verticillata) Biotypes

Author:
Haller, William T.,   et al.   ; Puri, Atul; MacDonald, Gregory E.;     Show all 3 Authors
Source:
Weed science 2007 v.55 no.6 pp. 578-583
ISSN:
0043-1745
Subject:
aquatic weeds; diploidy; Hydrilla verticillata; triploidy; tetraploidy; herbicide-resistant weeds; fluridone; biotypes; natural selection; invasive species; noxious weeds; shoots; Florida
Abstract:
... Hydrilla is one of the most serious aquatic weed problems in the United States, and fluridone is the only U.S. Environment Protection Agency (USEPA)––approved herbicide that provides relatively long-term systemic control. Recently, hydrilla biotypes with varying levels of fluridone resistance have been documented in Florida. Fluridone-susceptible (S) and several fluridone-resistant (R1 to R5) hydr ...
DOI:
10.1614/WS-07-034.1

3. Growth and Reproductive Physiology of Fluridone-susceptible and -resistant Hydrilla (Hydrilla Verticillata) Biotypes

Author:
Haller, William T.,   et al.   ; Puri, Atul; MacDonald, Gregory E.; Singh, Megh;     Show all 4 Authors
Source:
Weed science 2007 v.55 no.5 pp. 441-445
ISSN:
0043-1745
Subject:
plant growth; aquatic weeds; phenotype; Hydrilla verticillata; strain differences; fluridone; biotypes; plant reproduction; herbicide resistance; noxious weeds
Abstract:
... Hydrilla is one of the most serious aquatic weed problems in the United States, and fluridone is the only U.S. Environment Protection Agency (USEPA)––approved herbicide that provides relatively long-term systemic control. Recently, hydrilla biotypes with varying levels of fluridone resistance have been documented in Florida. Several biotypes of hydrilla varying in resistance levels were maintained ...
DOI:
10.1614/WS-07-020.1

4. Mutations in Phytoene Desaturase Gene in Fluridone-Resistant Hydrilla (Hydrilla verticillata) Biotypes in Florida

Author:
Haller, William T.,   et al.   ; Puri, Atul; MacDonald, Gregory E.; Altpeter, Fredy;     Show all 4 Authors
Source:
Weed science 2007 v.55 no.5 pp. 412-420
ISSN:
0043-1745
Subject:
weed control; aquatic weeds; alleles; Hydrilla verticillata; enzymes; mutation; herbicide-resistant weeds; fluridone; biotypes; enzyme inhibitors; amino acid sequences; nucleotide sequences; Florida
Abstract:
... Hydrilla is one of the most serious aquatic weed problems in the United States, and fluridone is the only U.S. Environment Protection Agency (USEPA)––approved herbicide that provides relatively long-term systemic control. Recently, hydrilla biotypes with varying levels of fluridone resistance have been documented in Florida. One susceptible and five fluridone-resistant biotypes of hydrilla varying ...
DOI:
10.1614/WS-07-011.1

5. Documentation of landoltia (Landoltia punctata) resistance to diquat

Author:
Haller, William T.,   et al.   ; Koschnick, Tyler J.; Glasgow, Les;     Show all 3 Authors
Source:
Weed science 2006 v.54 no.4 pp. 615-619
ISSN:
0043-1745
Subject:
weed control; aquatic weeds; diquat; cross resistance; electron transfer; herbicide-resistant weeds; resistance mechanisms; paraquat; Araceae; herbicide resistance; photosynthesis; pesticide formulations; Florida
Abstract:
... Landoltia was collected and cultured from a canal in Lake County, Florida, where diquat was used repeatedly during the past 20––30 yr for duckweed control. Recent applications of diquat failed to provide adequate control of duckweed, and a new commercial formulation of diquat was suspected. The new formulation was not the cause of reduced efficacy. Static exposures (48 h) to various concentrations ...
DOI:
10.1614/WS-06-002R.1