Browsing by Author "O'Dell, Charles R."
Now showing 1 - 20 of 38
Results Per Page
Sort Options
- 10 Years' Experience with Plasticulture Strawberries in a Colder AreaO'Dell, Charles R. (Virginia Cooperative Extension, 2009)Discusses use of plastic mulch in production of Chandler strawberries in mountain locations in western Virginia. Also compares strawberry production at locations where soil fumigants were used or not used.
- 4-H Vegetable Gardening. Unit One--For BeginnersO'Dell, Charles R. (Virginia Cooperative Extension Service, 1979-10)
- 4-H Vegetable Gardening. Unit One--For BeginnersO'Dell, Charles R. (Virginia Cooperative Extension Service, 1978-03)
- Blueberry Mulching Re-visitedO'Dell, Charles R. (Virginia Cooperative Extension, 2009)Discusses mulching as a means to improve growth and health of highbush blueberry plants.
- Club-root of cabbageLambe, Robert C.; McCart, Gerald D.; O'Dell, Charles R. (Virginia Cooperative Extension Service, 1979-01)Club root of cabbage disease cycle, symptoms, spread and survival of fungus. Control and fungicides
- The effect of maleic hydrazide in controlling plant populations in the strawberry in southwest VirginiaGingras, Rene Joseph (Virginia Tech, 1977-08-15)The effects of Maleic Hydrazide (MH) in controlling strawberry plant populations were studied. Foliar applications of MH at 1000 ppm resulted in reduced runner length. The effect of MH sprays appeared to be directly related to the stage of rooting at the time of spray applications. Rooted plants were affected less than non-rooted plants. By the end of the growing season (Oct. 31) plant populations were significantly less than the control (matted row) and equaled that of a hand thinned treatment. Sprayed and hand-pruned plots were significantly lower in yield and fruit number. Berry size was the same for all treatments.
- Effects of maturity and seed size on seed vigor and plant growth in snap bean (Phaseolus vulgaris L.)Herat, Lakshman Gamini (Virginia Tech, 1992-04-15)Stage of maturity at harvest and relative seed size can affect seed vigor. Greenhouse and field studies were conducted to determine the effect of seed maturity on seed vigor, storability, and subsequent plant growth of four cultivars of snap bean (Topcrop, Provider Black, Provider White, and Cherokee Wax). Seeds harvested between physiological maturity (PM) and harvest maturity (HM) showed the highest seed vigor and storability. At PM, seed moisture content was about 55%. A drop in seed fresh weight and a pod color change from green to yellow appear to signal the stage of PM. Delaying harvest past HM reduced seed vigor. The three cultivars with colored seed coats showed higher seed vigor than Provider White. Climatic and weathering effects on maturity, vigor, and yield of Topcrop and Cherokee Wax seed were evaluated at three locations (L-I, L-2, and L-3) in Sri Lanka having different agro-climatic conditions. Seeds that developed and matured under cooler conditions (L-l) produced higher yields and had larger size, better color, and higher vigor. Seeds developed and matured faster under warmer conditions (L-3); however, seed vigor and yields were lower and seed vigor dropped prior to HM. Cherokee Wax was the most tolerant to field weathering. Seeds of Topcrop and Cherokee Wax were separated by weight into three seed sizes (small, medium, and large) and evaluated for crop performance in two plantings (12/90 and 3/91). Field emergence was higher from larger seeds in the second planting, where the soil conditions were more stressful. Seedlings and plants at the flowering stage were larger and pod yields higher from larger seeds. The cultivar x seed size interaction was significant for pod yield per plant. Topcrop showed no differences, while with Cherokee Wax, pod yield per plant increased with increase in seed size during both plantings. Seeds produced from small seeds were similar or higher in vigor, indicating that small seeds could be used for seed production purposes. The data from these experiments indicate that vigor in snap bean seeds can be optimized by harvesting at an early stage after PM and by grading to remove small seeds.
- The effects of priming on vigor and viability of broccoli (Brassica oleracea var. italica Plenck) seedsJett, Lewis W. (Virginia Tech, 1994-12-15)Seed priming is a controlled hydration process, followed by dehydration, that allows pregerminative metabolic activity to proceed without germination. The objective of this research was to investigate the effects of priming on intrinsic characteristics of seed germination including temperature, water, and development, in order to understand how priming affects the germination of broccoli (Brassica oleracea var. italica Plenck) seeds. Priming of broccoli seeds consistently improved germination and emergence rate in the laboratory and field and was related to the accumulation of a specific level of hydropriming units expressed in MPa*h. Priming reduced the sensitivity of seed germination to temperature and increased the temperature range of germination but did not lower the minimum temperature for germination. Primed seeds leaked less electrolytes at supraoptimal temperatures (≥ 35°C) compared to nonprimed seeds. In the field, primed seeds produced a greater plant stand and yield under stressful emergence conditions. Under optimal conditions in the field for stand establishment, the advancement in emergence of primed seeds did not carry over to earlier, greater yields. Matric priming, using calcium silicate as the carrier in the ratio 1.0:0.8:1.8 (seed:carrier:water; by weight) for 7 d at 20°C, was superior to osmotic priming using polyethylene glycol (pEG 8000) at -1.2 :MPa in nearly all variables examined. This may be attributed to reduced respiration during priming of seeds in PEG or nutrient uptake by seeds in calcium silicate. The testa was observed to be a barrier to broccoli seed germination. Priming-induced changes to the physical characteristics of broccoli seeds included increased volume (32%) and an irreversibly expanded, and weakened testa with some minute cracking near the area where the radicle emerges. Primed seeds germinated faster, in part by maintaining a lower hydrotime constant, and thus exhibited a greater progression towards germination per unit water potential at a constant temperature compared with nonprimed seeds. It was hypothesized that, since the testa threshold was reduced after priming by expansion and formation of free spaces, the reversibly expanded embryo of primed seeds does not become immediately appressed to the testa upon rehydration. Thus the yield threshold component controlling the rate of germination of primed seeds is lower by the amount of the testa threshold. The priming effect is more than just reducing the yield threshold as indicated by a significant invigoration of seeds with split testae. Despite the increased volume as a result of the formation of free spaces, primed broccoli seeds did not imbibe more water or have a greater turgor at full hydration. Priming did not lower the minimum water potential allowing germination, and primed seeds did not plateau in water uptake but, instead, moved immediately from imbibition to expansive growth. Priming improved the germination rate of broccoli seeds at all stages of maturity with the most significant effects at stages before attainment of maximum dry weight. Dry storage of broccoli seeds at harvest able maturity (≥ 56 days after pollination) did not improve germination, indicating a lack of post harvest dormancy.
- Fall and spring broccoli yields and weed control under no-till and conventional tillage with overseeded legume living mulchesInfante, Michelle Louise (Virginia Tech, 1994-11-21)Experiments were conducted with 'BigSur' broccoli (Brassica oleracea var. italica Plenck) at two sites in fall of 1993 and at two sites in the spring of 1994 on a Hayter loam in southwestern Virginia. Objectives were to determine the tillage main-plot (CT = conventional tillage, and NT = no-tillage) and weed-control subplot (C = no overseeding or preemergent herbicide; HB = oxyfluorfen; RC = red clover (Trifolium pratense L.); WC = Dutch white clover (Trifolium repens L.); and HV = hairy vetch (Vicia villosa Roth) effects on broccoli yield and weed suppression. At all sites, marketable broccoli yield was equal or higher in NT than CT and was unaffected by overseeded legume living mulches. Overseeded legumes suppressed weeds as well as the HB in three of the four sites. These data show that the NT systems used in these experiments can suppress weeds and produce high broccoli yields and that overseeded legume living mulches can be effectively established after transplanting to suppress weeds without reducing broccoli yield.
- Fertilization of fresh market tomatoes grown under trellis and cage cultureO'Dell, Charles R.; McCart, Gerald D. (Virginia Agricultural Experiment Station, 1974-04)In a three year test yields of marketable and unmarketable tomatoes were statistically as good using high fertilization rates and low fertilization rates.
- Fertilizing Your GardenMcDaniel, Alan, 1948-; Adler, Barry, 1952-; O'Dell, Charles R.; Relf, Diane (Virginia Cooperative Extension Service, 1981-01)Describes proper fertilization for home gardens, including fertilizer types, relative nutrient requirements for vegetables, and application procedures.
- Grape growing in VirginiaPhillips, Edsel L.; O'Dell, Charles R.; McCombs, C. L. (Virginia Polytechnic Institute and State University. Extension Division, 1979-11)History of grape growing in Virginia. Best conditions for grape growing in Virginia
- Greenhouse Vegetable Schedules for Virginia with Artificial Soil MixesO'Dell, Charles R. (Virginia Cooperative Extension Service, 1979-09)Provides schedules and suggestions for growing greenhouse vegetables in Virginia, offers suggestions of fertilization rates, and offers cultural practices to conserve fuel in the production of greenhouse vegetables.
- Greenhouse Vegetable Schedules for Virginia with Artificial Soil Mixes (Includes possible vegetables-bedding plant combinations)O'Dell, Charles R. (Virginia Cooperative Extension Service, 1974-12)Provides schedules and possible vegetables-bedding plant combinations for use by greenhouse crop growers in Virginia. Also provides information on tomato varieties and yield in Virginia and practices to conserve fuel while producing greenhouse vegetables.
- Highbush blueberry production : a guide for commercial growers in VirginiaHimelrick, David Glenn, 1949-; O'Dell, Charles R. (Virginia Cooperative Extension Service, 1982-05)Deals with practices for commercial production of highbush blueberries in Virginia.
- Hill System Plastic Mulched Strawberry Production Guide for Colder AreasO'Dell, Charles R.; Williams, Jerome D. (Virginia Cooperative Extension, 2009)Discusses the cultivation of strawberries in raised beds covered in plastic mulch film, drip irrigation, varieties of plants to select, use of methyl bromide soil fumigant, and frost control. Cost considerations are also noted.
- Influence of temperature, soil moisture, and planting depth on germination and emergence of 'Packman' broccoliElson, Marshall Kent (Virginia Tech, 1989-06-05)Broccoli growers in Southside Virginia have had difficulty with stand establishment. This research was undertaken to identify potential causes of poor stand establishment. Temperature and soil moisture conditions in Southside Virginia during July and August are often less than favorable for seedling growth. Experiments were designed to test the temperature and moisture stress limits for germination and emergence of 'Packman' broccoli, under the controlled conditions of growth chambers.
- Lima Beans and Snap BeansO'Dell, Charles R.; Borchers, Edward A. (Virginia Cooperative Extension Service, 1975-01)Describes the factors which must be considered during crop production of lima beans and snap beans, including soil, varieties, fertilizing, planting, harvesting, and labor.
- More Vegetables from Your Garden: Leader's GuideO'Dell, Charles R. (Virginia Cooperative Extension Service, 1975-03)Lists activities that leaders may choose from in order to help adults and youth learn about gardening.
- Natural Plant Hormones Are Biostimulants Helping Plants Develop Higher Plant Antioxidant Activity For Multiple BenefitsO'Dell, Charles R. (Virginia Cooperative Extension, 2009)Discusses the use of plant growth hormones to improve growth and production of crop plants.