Download or read book Restoration of Native Plants Through Chemical Control of Alligatorweed Alternanthera Philoxeroides at Eufaula National Wildlife Refuge written by and published by . This book was released on 2006 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigations Into the Chemical Control of Alligatorweed alternanthera Philoxeroides written by Thomas Anthony Tucker and published by . This book was released on 1990 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biological Control of Alligatorweed 1959 1972 written by Jack R. Coulson and published by . This book was released on 1977 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecology and Management of Alligator Weed Alternanthera Philoxeroides written by Imogen Eleanor Bassett and published by . This book was released on 2008 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Summary Review of Investigations on Alligatorweed and Its Control written by Lyle W. Weldon and published by . This book was released on 1960 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Integration of Biological and Chemical Control of Alligatorweed written by Robert D. Blackburn and published by . This book was released on 1972 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: Applications of 2 lb/A 2,4-dichlorophenoxy acetic acid (2,4-D) coordinated with alligatorweed flea beetle (Agasicles hygrophila) feeding damage resulted in the deterioration of subsurface mats of alligatorweed (Alternanthera philoxeroides (Mart.) Griseb.). The constant pressure on the surface alligatorweed growth, when using the integration method, appeared to deplete the subsurface carbohydrate reserves in alligatorweed stems. The integrated control in laboratory and small plot experiments has yielded a greater reduction of floating alligatorweed mats than is attainable with either agent alone. (Modified author abstract).
Download or read book Aquatic Plant Control Program written by and published by . This book was released on 1973 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: The greatest success with the Agasicles as a biocontrol for alligator weed has been at experimental sites in Florida. The increased effectiveness of the alligator weed beetle in this area is believed to be related to the ability of the insect to overwinter. The Agasicles population usually has two peaks of activity in Florida as compared with one in other states. Alligator weed mats present at the beginning of the study reported herein have decreased in size and thickness. Plant competition has played an important role in controlling the alligator weed at the Goose Creek site by Agasicles and at several other sites in the southeastern states. The feeding of the Agasicles on alligator weed decreases its ability to compete with other aquatic plants. Other insects may be used to extend control over a greater geographic area. (Author).
Download or read book Aquatic Plant Control Research Program Alligatorweed Survey of Ten Southern States written by Alfred F Confrancesco (Jr) and published by . This book was released on 1988 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alligatorweed (Alternanthera philoxeroides (Mart.) Griseb.) is an exotic South American plant introduced into the United States prior to 1897. It rapidly developed into problem levels throughout most southern states, where it outcompetes native vegetation and interferes with navigation and recreational use of waterways. Three biological control agents Agasicles hygrophila (Selman and Vogt), Amynothrips andersoni (O'Neill) and Vogita malloi (Pastrana) were released in the United States between 1964 and 1970 for the control of alligatorweed. A review of the releases and population development of these insect species was conducted through 1972 by US Department of Agriculture scientists. The objectives of this study were to: (a) determine the current extent of the alligatorweed population in each state and ascertain whether or not it occurred at problem levels, (b) define the current population levels of biocontrol agents at selected original release sites and assess their impacts on the alligatorweed population, (c) describe the current distribution of each species of biocontrol agent in each state, (d) identify environmental factors influencing the effectiveness of each biocontrol agent, and (e) provide recommendations for managers to enhance the effectiveness of each biocontrol agent in areas where control has not been achieved. Keywords: Biological weed control; Aquatic weeds. (kt).
Download or read book Influence of Environmental Parameters on Penoxsulam Control of Alligatorweed alternanthera Philoxeroides in Rice oryza Sativa written by Samuel Duane Willingham and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Alligatorweed is a perennial plant which reproduces vegetatively and has spread from waterways into canals and ultimately into rice fields of Louisiana and Texas. Penoxsulam is a new acetolactate synthase (ALS) inhibiting broad-spectrum herbicide that was registered for rice in 2005. Previous research on alligatorweed control has focused mainly in aquatic areas and in the rice producing regions of Louisiana with little success. Research is limited using penoxsulam for alligatorweed control in rice production and results vary between year and location. Variability could be due to growth habit and resource allocation of this perennial species. Therefore, field and laboratory experiments were conducted from 2004 to 2007 to: 1) evaluate the effects of select rice herbicides on alligatorweed control, 2) determine the absorption and translocation efficiency and the effect of propanil on penoxsulam in alligatorweed 3) access the environmental effects of temperature on penoxsulam efficacy and determine application timing to avoid antagonism with propanil and, 4) evaluate the effects of flood timing and rice cultivars on rice root stunting and plant foliar injury from penoxsulam applications. Alligatorweed control was obtained from penoxsulam or bispyribac-sodium applied alone; however, mixtures with propanil were antagonistic. Day temperatures at 21 C increased efficacy of penoxsulam compared to 27 and 30 C day temperatures. Delaying propanil applications 3 days following penoxsulam applications were required at 21 and 27 C and 10 days at 30 C in order to avoid antagonism. Alligatorweed absorbed up to 33% of penoxsulam when applied alone, but most was retained in treated leaves (29%). Propanil reduced penoxsulam absorption into alligatorweed with only 22% of total penoxsulam recovered being absorbed by alligatorweed. More than 50% remained on the leaf surface of the treated leaf. Previous research has indicated root stunting of rice plants from ALS inhibiting herbicides. When various rice varieties were permanently flooded one week after herbicide application of penoxsulam, root stunting was greater compared to delaying flood establishment 7 or 14 days after treatment. Significant root stunting, however, did not affect rice yield.
Download or read book Alligator Weed Alternanthera Philoxeroides written by National Weeds Strategy Executive Committee (Australia) and published by . This book was released on 2001 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Summary Review of Investigations on Alligatorweed and Its Control 1960 written by Lyle W Weldon and published by Hassell Street Press. This book was released on 2021-09-09 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book Optimising the Management of Invasive Aquatic Plants Targeted for Extirpation from Catchments and Waterways written by Daniel Clements and published by . This book was released on 2017 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Aquatic plants are integral components of freshwater ecosystems and provide essential ecosystem services. However, when invasive species establish in new aquatic environments, there are few natural checks and balances to inhibit their growth and spread. Overabundant aquatic vegetation can harm aquatic systems if left unchecked and negatively impact on agricultural productivity, social amenity and biodiversity values. Prevention and early intervention are recognised as the most cost effective means to manage invasive species that pose a biosecurity risk. This thesis contributes to the development of effective management strategies for one of the world's most invasive aquatic plant species, known as alligator weed (Alternanthera philoxeroides (Mart.) Griseb.). It focusses on developing management strategies in an early stage of invasion, in order to achieve extirpation of this species from catchments and waterways. Developing effective detection and surveillance strategies are required for invasive aquatic plants, as a key impediment to achieving extirpation is the ability to detect infestations, so that control strategies can be enacted. This thesis investigates the effectiveness of aerial surveillance for detection of alligator weed at different spatial scales, using high altitude aerial imagery (orthophotos) and unmanned aerial vehicle (UAV) technology. An examination of the growth rate of alligator weed in Victoria, Australia, over a five year period, demonstrates the effective use of orthophotos to detect and monitor large infestations of aquatic alligator weed. The efficacy of unmanned aerial vehicle technology, including the use of automated algorithms, to detect patches of alligator weed growing in waterways is evaluated against current detection techniques. Effective management of invasive aquatic plants targeted for extirpation requires the coupling of effective detection and control efforts to prevent reproduction. To date, development of control strategies for aquatic alligator weed has been limited to evaluating the efficacy of short-term control at a local scale without regard to the effects of management strategies on dispersal of propagules throughout catchments. This thesis determines that viable alligator weed stem fragments are produced following herbicide application, which comprises extirpation efforts. This thesis has gone further than current practice in that it has evaluated the efficacy of current and novel control techniques, in both laboratory and field trials and has developed methods to manage viable fragment production post-herbicide application, to limit dispersal throughout catchments. In this respect, the application of the herbicides glyphosate, metsulfuron-methyl and imazapyr, and their effectiveness when incorporating surfactant systems and plant growth regulators, have been evaluated in field and laboratory studies to optimise control techniques for aquatic alligator weed. Results have shown that our approaches, when used in an early stage of invasion, are capable of eliminating patches of alligator weed in two to three years. Integral to the research is an experiment to determine the effect of herbicide treatments on the production of alligator weed stem fragments and their subsequent viability. Further investigation to determine the usefulness of commercially available plant growth regulators (PGRs) to reduce the number of viable propagules produced by alligator weed post-herbicide application was found to be ineffective. This thesis also evaluates the impact of herbicides and surfactant systems, on all key alligator weed response metrics in aquatic environments including; above ground biomass, below ground biomass and viable stem fragmentation. No previous studies have looked simultaneously at these three important measures for determining the efficacy of a particular control regime, and we have determined that this is essential for effective management of aquatic alligator weed in an early stage of invasion. The thesis has underscored the notion that development of more effective management strategies, based upon experimental trials, will result in an increased likelihood of eradicating invasive aquatic plants that pose a biosecurity risk, and thus move toward the mitigation of the threat that high-risk species pose to aquatic ecosystems." -- Abstract.
Download or read book The Biological Control of Alligatorweed written by Neal R. Spencer and published by . This book was released on 1975 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alligatorweed, Alternanthera philoxeroides, an aquatic amaranth introduced into the United States from South America around the turn of the century, has become a noxious aquatic weed over the past 40 years. Three insects appeared suitable for introduction into the United States as biological control agents of alligatorweed. These insects are: (1) Agasicles hygrophila, (Coleoptera: Chrysomelidae), now commonly known as the 'alligatorweed flea beetle'; (2) Amynothrips andersoni (Thysanoptera: Phlaeothripidae), the 'alligatorweed thrips'; and (3) V. malloi, the so-called 'alligatorweed stem-borer'. A general discussion of the biology, feeding behavior, and resulting plant damage of these insects is given. Portions of this document are not fully legible.
Download or read book Alligator Weed written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Management Program for Alligatorweed in North Carolina written by Kenneth A. Langeland and published by . This book was released on 1986 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vogtia Malloi a Newly Introduced Pyralid Lepidoptera for the Control of Alligatorweed in the United States written by John Lee Brown and published by . This book was released on 1973 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vogtia malloi pastrana was introduced into the United States in the spring of 1971 as a biological control agent of alligatorweed, Alternanthera philoxeroides (mart.) Griseb. Vogtia populations were established and survived the winter as far north as Columbia, S.C., and as far south as Fort Lauderdale, Florida, Vogtia populations dispersed randomly from release sites, and at one location in 1971 reduced the number of aerial stems/sq. ft. from 52.5 to 4.0 in four generations. Studies reported herein include: a canonical analysis which describes the insect-host plant relationship between Two insects and alligatorweed, the relationship between nutrient levels and alligatorweed growth, and a comparison of alligatorweed growing in lakes and in streams; a multivariate regression analysis which measures the significance of each of 12 measured variables in influencing the growth and spread of alligatorweed. Also included are measurements of alligatorweed productivity in greenhouse studies and in field plot studies during the spring and summer growth periods. (Author).
Download or read book Alligatorweed written by and published by . This book was released on 1997 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
