Download or read book Some Factors Influeneced by Honey Bees on Alfalfa Seed Production in South Dakota written by Paul William Bergman and published by . This book was released on 1958 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Alfalfa Seed Production in Central Iowa as Influenced by Honey Bees and Certain Other Factors written by B. Austin Haws and published by . This book was released on 1955 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of Some Factors Influencing Alfalfa Seed Production written by John Harold Miller and published by . This book was released on 1948 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Use of Honey Bees in Alfalfa Seed Production written by George Haymaker Vansell and published by . This book was released on 1951 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Economic and Other Factors Associated with Variation in Alfalfa Seed Production in South Dakota written by Charles Harris Benrud and published by . This book was released on 1963 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Alfalfa Seed Production as Affected by Revolving Cylinder Pressure Tripping and Cross pollination of Alfalfa by Honey Bees written by Carl Edward Ekstrom and published by . This book was released on 1952 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Insecticides Increase Alfalfa Seed Production in South Dakota written by Robert John Walstrom and published by . This book was released on 1961 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Some Factors that Affect Pollination and Seed Formation in Alfalfa Medicago Sativa L written by Norman Richard Bradner and published by . This book was released on 1964 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of this study were (a) to measure the amount of cross-pollination caused by three bee species at 10, 20 and 40 rods distance from a foreign pollen source, (b) to measure the effects of bee species, planting pattern and season on broad sense heritability estimates for seed yield in alfalfa, (c) to determine the incidence of selfing caused by the bees, (d) to investigate the usefulness of bees as a breeding tool in alfalfa and (e) to determine which of the three planting patterns used in this investigation is the best in effecting the maximum amount of cross-pollination. Three bee species, the honey bee, Apis mellifera L.; the leaf-cutter bee, Megachile rotundata F. and the alkali bee, Nomia melanderi Ckll. were chosen for this investigation because of their importance as pollinators in alfalfa. Studies under conditions of good isolation for bee species and competitive bloom were necessary to obtain reliable results. In the center of a three mile square isolated area, seven plots of recessive white-flowered clonally established plants were planted 10, 20, 40, 80, 160, 240 and 320 rods north of a colored-flowered population, and seven plots were planted at the same distance east of the colored-flowered population. Seven planting patterns were used in the east series. Three of these were utilized by the bees described. The number of florets tripped, pods developed and seeds developed in each pod were recorded for each raceme visited by pollen collecting bees. Seed samples from the white-flowered clones were grown in a greenhouse to ascertain whether the seed resulted from cross- or self-pollination. A record of flower color in 1963 demonstrated that at 10, 20 and 40 rods from a contaminant source honey bees caused 15.7, 11.2 and 5.8 percent cross-pollination; leaf-cutter bees caused 13.1, 4.8 and 8.1 percent cross-pollination while endemic pollinators caused 42.9, 30.9 and 10.0 percent cross-pollination in 1962. An important fact in this regard was that endemic pollinators caused 6.52 percent cross-pollination at a distance of a mile. Bee species, planting pattern and season caused large fluctuations in broad sense heritability estimates for seed yield in alfalfa. The ratio environmental variance to phenotypic variance gave a good indication which environmental factor caused the most fluctuation in the estimate. When endemic pollinators were used 94.7, 88.3, 36.3 and 23.1 percent selfed seeds were recorded as occurring in pods with one, two, three and four or more seeds per pod. One seven seeded pod was recorded as possessing three selfed seeds. Data from leaf-cutter bees showed that all of the pod types had over 67 percent selfed seeds. Distance from the contaminant source affected the percentage selfed seeds. At 40 rods only the four or more seeded pods contained any crossed seeds (20 percent) Leaf-cutter bees trip 27-50 percent more florets per raceme and cause less cross-pollination at 10, 20 and 40 rods than honey bees. Honey bees cause approximately the same amount of cross-pollination at 10 and 20 rods while the value obtained at 20 rods for the leaf-cutter bee was close to one-third of the value at 10 rods. Leaf-cutter bees also showed less preference between colored- and white-flowered alfalfa flowers. Of several planting patterns considered, maximum cross-pollination was obtained in a plot planted with alternating rows of alfalfa.

Download or read book Influence of Honey Bee Pollination on Alfalfa Seed Yield written by John Dee Stroud and published by . This book was released on 1966 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Honey Bees in Alfalfa Seed Production written by University of Arizona. Cooperative Extension Service and published by . This book was released on 1962 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Use of Honey Bees in Alfalfa Seed Production written by George H. Vansell and published by . This book was released on 1951 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Influence of Training Upon the Visitations of Honey Bees to Alfalfa Flowers written by Julius Russell Anderson and published by . This book was released on 1951 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Honey Bees in Alfalfa Seed Production written by University of Arizona. Agricultural Experiment Station and published by . This book was released on 1970 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comparisons of the Profitability of Certified and Uncertified Alfalfa Seed Production in South Dakota written by Arnold Lyle Aspelin and published by . This book was released on 1960 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Factors Affecting Alfalfa Seed Production written by Ronald F. Meyer and published by . This book was released on 1987 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of the Influence of Management Practices on Alfalfa Seed Production in Manitoba written by K. W. Plews and published by 1973.. This book was released on 1973 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alfalfa seed production in Canada has been highly variable over the past two decades. Seed production has decreased from a high of 13.5 million pounds in 1952 to a low of just over l.0 million pounds in 1969. The three prairie provinces have accounted for over 80 percent of the alfalfa seed produced in Canada. Of this the province of Manitoba produced approximateLy 23 percent, (through personal communication with K. D. Russell, Lethbridge L973). Canada imported from 3 - 7 million pounds of alfalfa seed annually throughout the 1956-72 period and though seed production has been on a downward trend, seed use has been increasing. For these reasons attempts are being made to increase alfalfa seed production in Canada in general and in the province of Manitoba in particular. The importation of the alfalfa leaf-cutter bee Megachile rotundata F. into Alberta and Saskatchewan has resulted in a revival of the alfalfa seed industry In these regions during the past several years (Heinrichs (23)). Hobbs (25) has stated that this bee was most useful in areas in Western Canada where there was 350 or more daylight hours with temperatures above 69 F. during the pollinating period of alfalfa. Hobbs has also pointed out that these requirements are met in southern Manitoba. Little information is available in Manitoba on the management of the alfalfa seed crop itself. This study was set up to investigate some of the management problems confronting the Manitoba grower. The main question has been to what extent low seed yields were attributable to climate or to other factors. This study was concerned with the effects of planting densities as well as pre-cutting in spring on alfalfa seed yields. Data was collected on flower initiation dates, the length of the blooming period, pollen and nectar production....

Download or read book Bees and Other Pollinating Insects Research written by and published by . This book was released on 1987 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: