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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 93 for “"chemical control"”.
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Biological and chemical control of fungal seedling diseases of cowpea
… in rural areas where there are few or no control measures against these pathogens. This research aimed at evaluating the efficacy of a biological control agent and fungicides against fungal seedling diseases of cowpea. The bacterium, Bacillus cereus1, and the fungicides, Apron®, Subdue® …
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Chemical control of larvae of the dog hookworm Ancylostoma caninum (Erolani)
Call number: LD2668 .T4 1950 L54
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Chemical control of larvae of the dog hookworm Ancylostoma caninum (Erolani)
Call number: LD2668 .T4 1950 L54
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Stewarding chemical control in tall waterhemp (Amaranthus tuberculatus) while foregoing statistical significance
… rapidly evolve resistance to herbicides. While chemical control is only one component of integrated weed management, it has proven to be extremely valuable and, therefore, we should prevent its loss. It is not reasonable to believe that applying more herbicides will stop the evolution of …
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Environmental influence on postemergence chemical control of crabgrass (Digitaria spp.) in turf
… herbicide standard) for postemergence control of large crabgrass (Digitaria sanguinalis) in Kentucky bluegrass (Poa pratensis) and bermudagrass (Cynodon dactylon) turf. BAS 514 was significantly influenced by variable environment. Section two of the research studied control of southern …
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Goss’s wilt and leaf blight of corn: chemical control, residue management and resistance
… hybrids. There are several ways that could help control the spread of Goss’s wilt, including chemical control, residue management and the use of resistant hybrids. These three areas of control were the subject of this research. While there are resistant hybrids for some regions, the availability …
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Survival and chemical control of Cylindrocladium spp. inciting root rot of black walnut seedlings
… after incubation of soils at 6 C for 4 wk. Control of Cylindrocladium root rot of black wainut seedlings with sodium azide at 224 kg/ha applied by the plowdown method was comparable to MC-33 at 504 kg/ha. Sodium azide at 67 kg/ha was only marginally effective in disease control. Reduction of …
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Aspects of chemical control of the old house borer, Hylotrupes bajulus (L.) (Coleoptera: Cerambycidae)
The formulation of Dursban®, manufactured by Dow Chemical Corp., and its diluting agent were found to influence the penetration abilities of the final spray when it is applied to pine sapwood. The diluent of choice for providing the best penetration of the active ingredient, chlorpyrifos, is an …
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Stereo–Chemical Control of Organic Reactions in the Interlamellar Region of Cation–Exchanged Clay Minerals
… intermediates can be generated by thermal, photochemical and transition metal catalysed processes from diazoalkanes. The carbene intermediates are very reactive and can add across double bonds to give 3-membered rings (cyclopropanes), insert into OH bonds to give esters and insert into …
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Studies on the host range and chemical control of fungi associated with diseased tropical fish
… of host specificity were evident. All chemicals tested (Table 4) showed definite fungicidal abilities. No effective fungicidal concentration of the chemicals tested would permit sustained fish culturing. Malachite green was the most effective fungicide tested, being functional in …
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Chemical Control and Understanding of Horizontal Gene Transfers, Drug-Resistance Development, and Filament and Biofilm Formation
<p>Biofilms formed by microbes on surfaces are the sources for persistent infectious diseases and environmental problems. The mechanism and details of how antibiotics promote biofilm formation is largely unknown. For instance, it not clear what stages of biofilm growth are promoted to proceed …
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Chemical Control of the Spin-Phonon Interaction to Develop a New Generation of Molecular Quantum Bits
… low energy phonon bath of its matrix. Therefore, controlling the strength of this interaction is critical for a new quantum technology. In the weak spin-phonon coupling regime, we can design technology where quantum states can be maintained, even at high temperatures. In the strong spinphonon …
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Evaluation of fungicide resistance in Sclerotinia minor and strategies for chemical control of sclerotinia blight of peanut
… During three years of field tests, RH-3486 controlled Sclerotinia blight of peanut significantly better than iprodione. The spray adjuvant, pinolene (Nu-Film-17®), significantly improved the performance of iprodione (Rovral®) over 5 years of field tests. Average yields from plots treated …
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Studies on the chemical control of Fusarium ear blight of winter wheat (<i>Triticum aestivum</i> L.)
… vitro</i> by over 90 % compared to the untreated control. In addition, chlorothalonil inhibited spore germination of all species and pyrimethanil reduced the mycelial growth of <i>M. nivale</i> by over 60 % at 2 µg ml<sup>-1</sup>, although it was ineffective against the other species. In the …
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Evaluation of Economic Injury Levels and Chemical Control Recommendations for Rice Stink Bug (Oebalus Pugnax) in Louisiana
… above all other labeled products for RSB control. Growers in Texas averaged more applications of pyrethroids than respondents in Arkansas and Louisiana. Seed treatments to combat rice water weevils have been adopted rapidly in all states surveyed.
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Non-chemical control of the Red-billed Quelea (Quelea Quelea) and use of the birds as a food resource
… (60% fenthion a.i.) remains the preferred control measure despite its negative impact on the environment and high cost. As an alternative control measure, the mass trapping of quelea and harvesting their chicks to use both as a source of protein and for income generation was investigated. …
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A biophysical and economic evaluation of biological and chemical control methods for Solanum elaegnifolium (Silverleaf Nightshade) in the Limpopo province, South Africa
… insignificant, indicating that biological and chemical control were both effective in the management of S. elaeagnifolium. However biological control was shown to be more economically beneficial than chemical control, since there was a net gain as a result of lower costs using L. texana …
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Evaluation of Pythium root rot and damping off resistance in the ancestral lines of North American soybean cultivars and chemical control of the active ingredient ethaboxam in seed treatments
… has been on the market for over 30 years to control oomycetes, especially Pythium spp. and Phytophthora sojae. A new active ingredient, ethaboxam, has recently come to the fungicide seed market as a new management tool against oomycetes. In order to understand the effects of the new active …
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Assessing chemical control options and their effects on lesser clover leaf weevil, red clover pollinators and evaluating red clover seeding rates for optimal seed production and N fixation in Saskatchewan, Canada
… deltamethrin and cyantraniliprole in controlling LCLW in red clover in both field and laboratory-based evaluations, as well as to assess potential impacts on the bee community. The second objective was to determine the optimal red clover seeding rate for both seed production and N …
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The effectiveness of biological control of Frankliniella occidentalis in prevention of the spread of Tomato spotted wilt virus
… compare the relative effectiveness of biological control versus chemical control for western flower thrips, Frankliniella occidentalis, as a means of reducing the spread of Tomato spotted wilt virus (TSWV) on tomatoes. To compare efficacy of different thrips management tactics for reducing TSWV …
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