Organisms Commons^™

Clover Scorch Fungicide Trials, Cercospora Leaf Spot, Facial Eczema Investigation., A Bokor

Experimental Summaries - Plant Research

Clover scorch fungicide trials – 81AL33, 81D8. Cercospora leaf spot – 81AL35. Facial eczema investigation - In W.A. a serious outbreak of this disease has occurred on mixtures of annual and perennial species in the autumn.

Diseases Of Lupins And Lupinosis., P Mcr Wood

Experimental Summaries - Plant Research

Summary of experimental results, 1981. Geraldton: Brown spot (Pleiochaeta setosa) was widespread. Root rots were not considered generally to be a problem in 1981.Three Springs: Fungal root rots were commonly observed. Brown spot leaf and stem infection was also prevalent. Moora: Brown spot was the most prevalent. Northam: Crops were generally healthy. Albany: Crops were generally healthy Sclerotinia being present. Bridgetown: Brown spot was the main disease present. Root rots were also present. In December, a widespread disorder occurred, Late brown spot infection is suspected. An important point emerging from the programme is that often the lines showing Phomopsis resistance …

Screening Of Clovers For Resistance To Clover Scorch, D. L. Chatel

Experimental Summaries - Plant Research

Clover Scorch (Jointly with Dr C.M. Francis). One thousand four hundred and seventy six legumes were screened in the field at the Denmark Research Station for susceptibility to clover scorch. They comprised 1440 subterranean clovers, eight other Trifoliums, two medics and 26 serradellas. The clovers from Australia gave interesting results. Thirty four of them were selections of Seaton Park, chosen by R.C. Rossiter and W. J. Collins on the basis of their variation. They did not differ in their reaction to clover scorch; all gave rating of 9. Twenty-six lines of Woogenellup from W.A. and 12 of Woogenellup and Morrar …

Legume Diseases, P Mcr Wood

Experimental Summaries - Plant Research

Lupin root disorder. Resistance to lupins to Phomopsis leptostromiformis (Fungal ratings by P. McR. Wood and F.M. O'Donnell, data compiled by J. Hamblin, Plant Production Division) Phomopsis levels on any particular genotype are influenced by environment. Therefore material selected for Phomopsis resistance is done so on its being better than average over all sites. Data for the Plant Breeders' S2-l trial at Avondale (ARS), Badgingarra (BRS), Chapman (CRS), Esperance (ERS) and Mt. Barker (MTRS) are shown in Table 3.

Screening Of Clovers For Resistance To Clover Scorch, D L. Chatel

Experimental Summaries - Plant Research

One thousand one hundred and seventy clover cultivars, varieties and crossbreds were screened in the field for susceptibility to the clover scorch disease fungus.

1979 Summary Of Experiments, T N. Khan

Experimental Summaries - Plant Research

79MT22 Mid season sown experiment, Mt Barker 79BA25 crop loss assessment trials, Badgingarra 79MT49 scoring system for leaf diseases, Mt Barker 79BA24 Inter-plot interference at various distances in Net Blotch, Badginarra Research Station 79WH17 Inter-plot interference at various distances in Net Blotch, Wongan Hills Research Station 79BA21 Inter-plot interference at various distances in Barley Scald, Badgingarra Research Station 79MT23 Inter-plot interference at various distances in Barley Scald, Mt Barker Research Station 79BA53 Scald nursery, Badgingarra 79BA54 Net Blotch nursery, Badgingarra 79WH52 Net Blotch nursery, Wongan Hills 79BA20 Crop loss assessment, Badgingarra Research Station 79BA22 Evaluating differences in field reaction of …

Euthanasia Of Dogs And Cats: An Analysis Of Experience And Current Knowledge With Recommendation For Research, T. Carding, The Institute For The Study Of Animal Problems

Euthanasia Collection

While it may be regarded by some as inhumane or unethical to take any life, mankind, as responsible stewards of animals, is obliged to do so for many reasons: for food, health, population control, to alleviate incurable suffering, etc. Yet beyond the ironies and ethical dilemmas of the right to life versus the right to take life, lies the necessity to destroy life. This entails an enormous ethical responsibility relevant to the times, and also the moral injunction that the method of killing be humane, in other words, causing the least possible distress, physically and psychologically. This injunction implies, therefore, …

Summary Of 1975 Field Experiments With Advisers: "Rape Blackleg Disease Fungicide Trials", M J. Barbetti

Experimental Summaries - Plant Research

During 1973 and 1974 a large range of fungicide spray and seed treatment schedules were tested. The 1973 results were, on the whole, not very encouraging, but the very early post-germination spray, two weeks after germination, did indicate a possible means of control. In view of the 1973 results, in the 1974 trials fungicidal sprays were applied early, and a new method of application of fungicide to the seed, known as "prilling" was used. Using fungicide seed prills and seedless fungicide prills the idea was to have the fungicide mixed with materials which dispersed upon wetting, so releasing and making …

The Behaviour Of Swine, J. P. Signoret, B. A. Baldwin, D. Fraser, E. S. E. Hafez

Mammalogy Collection

The pig was a forest-dwelling animal from the beginning of its history. In some parts of the world it has been domesticated for at least 7000 years. The European breeds of domestic swine were derived from the local wild pig, Sus scrofa. Herds ranged in pastures and forests and kept indoors only for fattening. The breeds in the Far East were derived from another wild pig, Sus vittatus, a smaller animal with shorter legs and a higher reproductive ability (Mohr 1960; Zeuner 1963). The two types interbred readily. The modem breeds of pig evolved from different crossings between the two …

Time And Rate, Comparative Fungicide, Fungicide Application Method Trial, Clover Scorch Economy Demonstrations, A Bokor

Experimental Summaries - Plant Research

Time and Rate Trial 75AL33 Comparative Fungicide Trial 75AL34. Fungicide Application Method Trial 75D8. Clover Scorch Economy Demonstrations 75AL35.

A Study Of Naturally Occurring Algicides Produced By Freshwater Algae, Denny O. Harris, Harry D. Caldwell

KWRRI Research Reports

The mode of action of the algicide produced by Pandorina morum was examined by exposing Volvox globator and isolates spinach chloroplasts to a partially purified algicide preparation. Oxygen evolution of Volvox, whole chloroplasts and broken chloroplasts (minus the Calvin cycle),was reduced indicating that the algicide inhibits the light reactions of photosynthesis. Oxygen evolution studies of other Volvocaceae confirmed the observation that Pandorina morum is not significantly influenced by its own inhibitor. Molecular weight approximation by gel filtration established that the inhibitor has a low molecular weight (probably below 100 mw). Field studies indicate that this algicide has tremendous potential as …

Metabolic Capabilities Of Sulfur Oxidizing Bacteria And Their Role In Water Pollution, M. I. H. Aleem

KWRRI Research Reports

This report describes investigations into the physiology of microorganisms that are commonly involved in the oxidation of inorganic sulfur compounds. The metabolic activities of these bacteria play a potent role in several fields of economic importance such as strip mining operations, water pollution, corrosion, metallurgy, petroleum technology and soil fertility processes.

The oxidation of inorganic sulfur compounds was studied in the chemolithotrophs Thiobacillus denitrificans, Thiobacillus A₂, Thiobacillus neapolitanus, and a photolithotroph Rhodopseudomonas palustris. Cell suspensions from all of the thiobacilli catalyzed completely the oxidation of sulfide, thiosulfate, and sulfite to sulfate. The oxidation of thiosulfate in R. palustris …

A Study Of Water-Soluble Inhibitory Compounds (Algicides) Produced By Fresh-Water Algae, Denny O. Harris, Manhar C. Parekh

KWRRI Research Reports

A complex system of growth inhibitors was observed in the green algae (Volvocaceae). Inhibitors were found in the culture filtrates of some genera which limit their own growth (autoinhibitors) while others in the family produce substances which check the growth of other genera (heteroinhibitors). These inhibitors were destroyed by autoclaving. It was decided that Pandorina morum, which produced the strongest inhibitor and Volvox tertius, the most sensitive to the inhibitor would make an excellent model system for a study of the chemical and physical properties of these naturally occurring algicides. The algicide could be removed from actively growing cultures about …

Carbon And Nitrogen As Regulators Of Algal Growth In Treated Sewage, Edward G. Foree, Charles Reece Scroggin

KWRRI Research Reports

Continuous flow algal cultures were grown under three different growth conditions using secondary sewage treatment plant effluent as the growth medium. The only variable within each run was the hydraulic residence time. The concentrations of growth regulating nutrients were varied between the runs so comparisons of the algal mass, composition, nutrient uptake, and genera could be made. The importance of CO₂ availability for algal growth was also studied. A kinetic theory which based algal growth on cellular nutrient concentration was verified. The second phase of the study was a batch culture study in which the same growth medium was …

Factors Regulating The Growth Of Algae In Continuous Culture In Diluted Secondary Sewage Treatment Plant Effluent And Subsequent Biodegradability, Edward G. Foree, Caroline P. Wade

KWRRI Research Reports

Heterogeneous algal cultures were grown in laboratory continuous culture in continuous flow, completely mixed chemostats in secondary sewage treatment plant effluent diluted to give an ammonia nitrogen concentration of 10 mg/1. Variables were lighting, pH, carbon dioxide availability, and hydraulic residence time.

Optimum growth occurred under pH 7.0, excess CO₂, and continuous lighting conditions. The availability of artificially supplied excess CO₂ greatly increased the mass (standing crop) at steady-state over that produced under otherwise identical conditions for all residence times studied. For the case of excess CO₂ availability, the nitrogen concentration in the algal cells regulated …

Metabolic Role Of Sulfates And Sulfides Producing Bacteria In Pollution Of Waters, M. I. H. Aleem

KWRRI Research Reports

Cytochrome transport particles from Nitrobacter catalyzed nitrite, ascorbate as well as NADH oxidation with concomitant phosphate esterification yielding P/0 ratios of 1.0, 0.6 and 2.0 respectively. Phosphorylation coupled to nitrite oxidation was not effected by rotenone, amytal or antimycin while 50 and 70% inhibition of the NADH-linked phosphorylation was observed in the presence of HOQNO and rotenone respectively. Cell-free extracts from Nitrobacter also catalyzed an energy-dependent reduction of NAD⁺ by nitrite. The reduction of cytochrome c by NŌ₂ was energy-dependent which involved the reversal of electrons from cytochrome a₁. The subsequent energy-linked reduction of the flavoproteins …

Algal Growth And Decomposition: Effects On Water Quality, Phase Ii, Edward G. Foree, Ronald L. Barrow

KWRRI Research Reports

The decomposition and associated nutrient regeneration of three unialgal cultures and one mixed culture containing an indigenous population of bacteria and microscopic animals were studied under dark, constant temperature laboratory conditions. After periods of nutrient-deficient growth ranging from O to 30 days, these cultures were inoculated with decomposer populations and subjected to anaerobic and aerobic environments for the decomposition studies. The extend of decomposition was determined from the percentage volatile suspended solids and percentage particulate COD remaining after 200 days of decomposition. The average extent of decomposition was greater for aerobic than for anaerobic conditions. However, significant portions of the …

Algal Growth And Decomposition: Effects On Water Quality, Edward G. Foree, John S. Tapp Jr.

KWRRI Research Reports

The chemical composition of algae grown in batch culture depends mainly on environmental conditions, nutrient availability, presence of predators, cell age, and species. The effects of nutrient availability and cell age on the composition of three unialgal cultures (algae + bacteria) and one hetergeneous culture (algae + bacteria + microscopic animals) were evaluated. The cultures were grown in batch culture under both nutrient-abundant and nutrient deficient conditions and the changes in compositions were observed. Luxurious uptake where nutrients are incorporated into cellular protoplasm at levels greater than those necessary for growth, and super-luxurious uptake, where some nutrients are stored rather …

Gorgas Memorial Laboratory, Kentucky Library Research Collections

Research Collections

Gorgas Memorial Laboratory : hearings before the Committee on Foreign Affairs, House of Representatives, seventieth Congress first session on H.R. 8128 to authorize a permanent annual appropriation for the maintenance and operation of the Gorgas Memorial Laboratory, January 20, 1928. Arguments for a bill to authorize a permanent annual appropriation for the maintenance and operation of the Gorgas memorial laboratory; with a speech of Hon. Maurice H. Thatcher, of Kentucky, in the House of Representatives.