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Influence Of Silicon On The Development Of Anthracnose Of Grain Sorghum, Sanjay Pokhrel
Influence Of Silicon On The Development Of Anthracnose Of Grain Sorghum, Sanjay Pokhrel
LSU Master's Theses
To study the effect of Silicon (Si) with and without a fungicide on anthracnose development of sorghum, several experiments were conducted in the greenhouse and field. In the initial study, different Si rates [0 (control), 0 (lime control), 200, 400, 600, 800 kg Si/ha] were used in a low-Si Alfisol to determine if inoculum densities were affected by Si levels. No differences were observed between inoculum densities of 1*105 and 1*106 conidia/ml in affecting anthracnose development in the greenhouse. Anthracnose severity was found to be lowest in plants treated with 800 kg Si/ha, regardless of inoculum density. In another study, …
Effects Of Glyphosate On Soybean Nutrition, Endophytic Colonization By Cercospora Cf. Flagellaris And Development Of Cercospora Leaf Blight, Teddy Garcia Aroca
Effects Of Glyphosate On Soybean Nutrition, Endophytic Colonization By Cercospora Cf. Flagellaris And Development Of Cercospora Leaf Blight, Teddy Garcia Aroca
LSU Master's Theses
Glyphosate (Roundup®, Monsanto, Inc., St. Louis, MO) is the most widely used herbicide in the world because of its broad spectrum and its efficacy in controlling annual broadleaf weeds and undesired grasses. The effect of glyphosate on mineral nutrition and plant diseases has been an important topic during the past decade, because of its controversial effects on plant mineral nutrition. In order to test the hypothesis that glyphosate affects soybean mineral nutrition, and therefore predisposes soybean to Cercospora leaf blight, six glyphosate-resistant (GR) soybean varieties were either not treated or treated with glyphosate in field experiments. Plants were then evaluated …
Influence Of Fertilizer Source And Irrigation Regimen On Containerized Production Of Coleus (Plectranthus Scutellarioides (L.) Codd) 'Solar Sunrise' And Management Of Bermudagrass (Cynodon Dactylon (L.) Pers. X C. Transvaalensis Burtt-Davy) 'Tifway', Kayla Renee Sanders
LSU Master's Theses
Fertilizer nutrient losses through leachate and runoff from excessive irrigation in nursery container production and turfgrass management can be high and have negative environmental impacts. The objective of this research was to examine the influence of fertilizer source and irrigation regimen on nutrient losses during nursery container production and turfgrass management. During the container production of coleus (Plectranthus scutellarioides (L.) Codd) 'Solar Sunrise', four fertilizer treatments: an unfertilized control; a controlled-release (CRF); a water-soluble (WSF); and a combination of 10% WSF and 90% CRF, were incorporated into a pine bark substrate at 0.30 kg N and P·m-3 in 3.7-L containers …
Geographic Distribution And Severity Of Strobilurin Fungicide Resistance Among Rhizoctonia Solani On Rice In Southwestern Louisiana, Allysson Gayle Lunos
Geographic Distribution And Severity Of Strobilurin Fungicide Resistance Among Rhizoctonia Solani On Rice In Southwestern Louisiana, Allysson Gayle Lunos
LSU Master's Theses
Strobilurin fungicide resistance threatens rice production in southwestern Louisiana. Strobilurins are the often relied upon method of managing sheath blight development due to the lack of strong genetic resistance to this disease in the currently available rice germplasm. However, isolates of Rhizoctonia solani AG 1-IA causing sheath blight were reported resistant to azoxystrobin near Mowata, LA in 2011. To determine the geographic distribution and severity of azoxystrobin resistance, 40 commercial rice fields in southwestern Louisiana were sampled for isolates of R. solani. Sensitivity to pyraclostrobin and trifloxystrobin was also assessed to investigate cross-resistance. A genetic test was used to …
Combining Forage And Cover Crop Benefits From Cool-Season Annuals In The Southeastern United States, Dustin John Smith
Combining Forage And Cover Crop Benefits From Cool-Season Annuals In The Southeastern United States, Dustin John Smith
LSU Master's Theses
Cow-calf operations in the southeastern United States (U.S.) are based on warm-season perennial grass pastures. Stored forage feeding during the non-grazing season constitutes more than half of a cattle operation’s annual expenses. Cool-season annuals can extend the grazing season, thereby reducing stored forage feeding. A two-year field trial was conducted to determine the forage potential of a variety of crops commonly used as winter cover crops in the southeastern U.S. The ten cover crop treatments included seven monocultures (annual ryegrass [Lolium multiflorum], rye [Secale cereal], oats [Avena sativa], triticale [Triticale hexaploide], tillage radish [Raphanus sativus], hairy vetch [Vicia villosa], crimson …