Browsing by Subject "Disease and pest resistance"
Now showing items 1-20 of 27
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(Texas A&M University. Libraries, 1980)Among 4 cultivars studied, Vitis Champini Planch cv. Dogridge demonstrated the greatest plant vigor and host tolerance to Phymatotrichum root rot caused by Phymatotrichum omnivorum (Shear) Duggar. V. rotundifolia Mich x ...
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(Texas A&M University. Libraries, 1988)Evidence is presented here for stress-induced changes in gene expression and the specificity of plant metabolic responses to applied stress. Analysis of changes in the rate and pattern of protein synthesis in slash pine ...
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(Texas A&M University. Libraries, 1986)Sorghum grain lots with various levels of resistance to sorghum grain mold (SGM) were evaluated for several loss parameters: kernel weight, kernel density, electrolyte leachate level, percentage germination, vigor, and ...
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(Texas A&M University. Libraries, 1979)Percent infection and gain per cycle of selection were compared after two cycles of mass selection with progeny test, mass selection without progeny test and S1 selection in breeding for resistance to sorghum downy mildew ...
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(Texas A&M University. Libraries, 1979)The concept o f a plant's immunity to virus disease implies a lack of infection as well as in ability of the virus to replicate. Plants having subliminal or latent virus infections are often considered immune. Microscopic ...
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(Texas A&M University. Libraries, 1992)Electron microscopy of SYBV showed icosohedral particles with maximum and minimum diameters of approximately 28 nm and 27 nm. The two isolates are statistically the same population at a probability greater than 95%. ...
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(Texas A&M University. Libraries, 1991)The effect of triazole fungicides on Phymatotrichum omnivorum (PO), grapevines and the interaction between grape rootstocks and PO were studied to have a better understanding of the control alternatives of PO in vineyards. ...
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(Texas A&M University. Libraries, 1986)Six cotton cultivars, three multi-adversity resistant (MAR) and three non-MAR, and their 15 F₁ and 15 F₂ progenies obtained from a diallel set of crosses (no reciprocals) were used to determine the genetic system controlling ...
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(Texas A&M University. Libraries, 1979)Deterioration of sorghum grain prior to harvest results primarily from attack by microorganisms, initiation of germination processes, insect damage and/or combinations of these factors. Other terms used to refer to preharvest ...
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(Texas A&M University. Libraries, 1987)Resistant cultivars offer the most economical means of controlling bacterial blight of cotton. New isolates of the pathogen have evolved in Africa which are virulent on previously resistant cultivars. The nature and mode ...
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(Texas A&M University. Libraries, 1984)Cotton bollworm interactions were studied on selected Upland cotton cultivars in 1981-83 at Corpus Christi, Texas. Neonatal bollworm, Heliothis zea (Boddie), larvae were confined on cotton plants for seven days in whole ...
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(Texas A&M University. Libraries, 1988)Significant differences were observed among sorghum cultivars in the amount of MDMV-A accumulated over time. Virus concentration (estimated as ELISA values, A410 nm) increased for 30 days following inoculation and then ...
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(Texas A&M University. Libraries, 1981)A composite economic threshold was developed for use in management of lepidopterous cabbage pests. Major emphasis was on the cabbage looper, Trichoplusia ni (Hubner), diamondback moth, Plutella xylostella (L.), and imported ...
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(Texas A&M University. Libraries, 1986)The spatial distribution of Liriomyza trifolii (Burgess) and its associated hymenopterous parasite complex was determined in field grown bell peppers at Weslaco, TX. L. trifolii larvae were most numerous during the first ...
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(Texas A&M University. Libraries, 1981)Seven sorghum inbred lines and 42 F1 hybrids from a set of diallel crosses among the lines were evaluated for reaction to head smut Sphacelotheca reiliana (Kuhn) Clint. Known vertical genes stacked into a single genotype ...
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(Texas A&M University. Libraries, 1986)Sixteen Peronosclerospora sorghi populations from seven countries were evaluated for variability in their virulence pattern on sorghum. All populations were identified as distinct vertical pathotypes based on differential ...
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(Texas A&M University. Libraries, 1992)Phenolic compounds were studied in relation to pod-rot and Aspergillus flavus resistance during pod development of peanuts. Amounts of free phenolic compounds (FPC) were abundant in immature (stage 2) while bound phenolic ...
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(Texas A&M University. Libraries, 1982)Fruit development of Upland cotton cultivars in three maturity groups (based on time of boll opening) were evaluated at two planting dates and two planting densities to determine the components contributing to early fruit ...
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(Texas A&M University. Libraries, 1985)Seventy-nine sudangrass (Sorghum sudanense (Piper) Stapf.) accessions obtained from foreign and domestic sources were inoculated with maize dwarf mosaic virus strains A and B. Sudangrass accessions were evaluated both in ...
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(Texas A&M University. Libraries, 1982)Three methods were used in 1980 and 1981 to investigate the relationship between adult soghum midge, Contrainia sorghicola (Coquilllett) (Diptera: Cecidomyiidae), density levels and yield loss in susceptible (S) and resistant ...