Browsing by Subject "Weeds -- Control"
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Item Carbohydrate trends in broom snakeweed (Xanthocephalum sarothrae)(Texas Tech University, 1982-05) Alliney, Jorge EBroom snakeweed (Xanthocephalum sarothrae) is a suffretescent shrub widely distributed in the southwestern United States and northern Mexico. This weed is a serious problem in range management since it is toxic and it is a strong competitor with the desirable grasses in the plant community. Therefore, its control is amply justified. Translocation of foliar applied growth regulating herbicides is associated with total nonstructural carbohydrate (TNC) translocation in the plant. Foliar herbicides have to be applied at a time when carbohydrates are translocated throughout the plant to be effective. Therefore, knowledge of TNC trends is fundamental to application of foliar applied herbicides. The study was conducted at two locations in Lea County, New Mexico, on broom snakeweed: (a) to estimate trend of TNC concentration through the year; (b) to correlate TNC to phenological stages; and (c) to evaluate the influence of environmental parameters that affect TNC. Environmental parameters measured included soil water content and soil temperature. Three plant parts: small stems, large stems and roots were analyzed for TNC by the method of acid extraction with .2N HCl and determined by spectrophotometry. The general trend had two peaks and two depressions at Location 2, but a less defined peak in midsummer at Location 1. No particular tissue was more important for storing carbohydrates than others. Snakeweed accumulated TNC during periods when elaboration of carbohydrates exceeded the demand for respiration and growth. Reserves were used for regrowth and for flowering. Soil temperature (30-cm depth) was the environmental parameter most closely associated with TNC.Item Differential responses of perennial weeds to glyphosate(Texas Tech University, 1979-08) Chykaliuk, Peter BohdanNot availableItem Early winter chemical control of bitterweed(Texas Tech University, 1971-12) Chambers, Rodney CNot availableItem Efficacy, persistence, and mobility of dicamba in High Plains soils(Texas Tech University, 1985-05) Keeling, WayneNot availableItem Foliar and soil activity of four selective grass herbicides(Texas Tech University, 1983-08) Bean, Brent W.Not availableItem Growth interaction between cotton and pigweed(Texas Tech University, 1970-05) Tseng, Hui-YingNot availableItem Growth, Development, and Seed Germination of Franseria Tomentosa, a Perennial Weed Species(Texas Tech University, 1971-08) Cooley, A. WayneNot Available.Item Propazine residue as influenced by rate, date, and method of application(Texas Tech University, 1969-05) Leonard, Wesley LeeNot availableItem The use of Tordon 212 and Tordon 225 for control of Juniperus pinchoti in Texas(Texas Tech University, 1969-05) Balduzzi, Richard AlanNot availableItem Varietal tolerance to disclosulam and flumioxazin in Texas peanut(Texas Tech University, 2003-08) Murphree, Trent AllenNot availableItem Weed management in conservation tillage using glyphosate in glyphosate-tolerant cotton systems(Texas Tech University, 2002-08) Helm, Alan LNot available