Download or read book Variation and Adaptation in the Imported Fire Ant Solenopsis Saevissima Richteri Forel in the Gulf States written by Edward O. Wilson and published by . This book was released on 1950 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: The imported fire ant, Solenopsis saevissima richteri Forel, is the southernmost race of a widespread and highly variable South American ant. It was introduced into the port of Mobile, Alabama, sometime around 1918 and by 1949 had spread to parts of Florida, Mississippi, and Louisiana. 2. A great deal of color variation from nest to nest has been noted in the Gulf States population. This includes an extreme blackish phase referable to the original description of richteri, an extreme reddish phase referable to no described form, and intermediates between the two. This color variation is correlated with differences in size of the ants and in appearance and proportion of their nests. 3. The variation has a genetic basis. It is suggested in this study that the variation can be explained most readily on the basis of multiple pleiotropic alleles. 4. The history of the variation has been determined as follows: The darkest forms, or richteri s. str., were the ones originally dominant from the time of the ant's introduction until at least 1929 and probably sometime after 1932. The origin of the new form is not known, although it is believed that it originated either through mutation within the population or through a second introduction. IN 1949 it was by far the dominant form. It had apparently replaced the typical richteri partly by rapid expansion and subsequent genetic dilution and partly through natural selection by direct competition. Its predominance in the main population and in at least two smaller isolated populations has evidently been responsible for a much greater success of the species. In the main population in 1949 the typical richteri was mostly limited in distribution to portions of the periphery of the range, forming with the new form roughly the concentric pattern of Matthew's modified Age-and-Area hypothesis. 5. The new form has been interpreted as functioning, regardless of its origin, as a favorable mutation introduced into the population. Its rise to dominance has constituted an extremely rapid, nearly vertical evolutionary change.
Download or read book Notes on the Biology of the Imported Fire Ant Solenopsis Saevissima Richteri Forel Hymenoptera Formicidae in Georgia written by Horace Odin Lund and published by . This book was released on 1967 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Report on the Imported Fire Ant Solenopsis Saevissima Var Richteri Forel in Alabama written by Edward O. Wilson and published by . This book was released on 1949 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Alimentary Canal of the Imported Fire Ant Queen Solenopsis Saevissima Richteri Forel written by John Robert Walker and published by . This book was released on 1959 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies on the Biology of the Imported Fire Ant Solenopsis Saevissima Richteri Forel written by George Truman Fincher and published by . This book was released on 1966 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecological Observations on the Imported Fire Ant Solenopsis Saevissima Richteri Forel in Alabama written by Kirby Lee Hays and published by . This book was released on 1959 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Feeding and Nutritional Relationships in the Imported Fire Ant Solenopsis Saevissima Richteri Forel written by Beverly Lee Ricks and published by . This book was released on 1970 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Anatomy and Histology of Some of the Systems of the Male of the Imported Fire Ant Solenopsis Saevissima Richteri Forel Hymenoptera Formicidae written by Mary Claudia Tice and published by . This book was released on 1967 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Foraging Habits and Effects of Imported Fire Ant Solenopsis Saevissima Richteri Forel on Some Arthropod Populations in Southeastern Louisiana written by Nicky Lynn Wilson and published by . This book was released on 1969 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Colony Ontogeny in the Imported Fire Ant Solenopsis Saevissima Variety Richteri written by Kenneth Paul Sandlan and published by . This book was released on 1973 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Survey of the Imported Fire Ant Solenopsis Saevissima Var Richteri Forel written by W. G. Bruce and published by . This book was released on 1949 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Toxic Bait Studies with the Imported Fire Ant Solenopsis Saevissima Richteri Forel written by Clifford Swanson Lofgren and published by . This book was released on 1968 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies were conducted to develop a toxic bait to control the imported fire ant, Solenopsis saevissima richteri Forel. The investigations were designed to find effective, inexpensive food attractants and delayed action toxicants that permit distribution of the bait in the colony before the worker ants are killed. A search was also made for granular carriers for the food attractants and toxicants that would carry the bait through vegetation to the ground where the ants forage. Vegetable oils with iodine values of about 100 and saturated animal fats such as lard and tallow were the most attractive food materials found. In addition, they are good solvents for the toxicants, relatively inexpensive and readily available. Highly unsaturated vegetable oils are unattractive. Rancidity and hydrogenation cause a decrease in the acceptance of vegetable oils. The most effective toxicant found was mirex. It gave delayed kill (less than I5/0 mortality after 2^^- hours but at least SO'jo after 2 to 20 days) over a k)0-fold range of concentrations (0.0025-1.0-;^). In a bait transfer test in which large worker ants transferred bait to equal numbers of minor workers, it gave kill of the minor workers over a 10- fold range of concentrations. It was the only toxicant that gave kill of major workers when baits were transferred to them by minor workers. Although not highly absorptive, the most useful and practical carrier was corncob grits. Mineral carriers such as attapulgite clay react with food oils, causing them to set-up or harden. The best bait formulation tested consisted of corncob grits (85;;^) impregnated with soybean oil containing mirex at concentrations of 0.075^ to 0.3^. It gave excellent control of ants in small plot tests. It is readily applied with various types of granular application equipment and is easily packaged and stored. Aerial application of this bait at the rate of 12 l/2 pounds per acre to a 960-acre plot gave over 99^0 control of ant colonies. The bait is now used routinely in the Imported Fire Ant Eradication Program.
Download or read book Food Habits Baits and Attractants Concerning the Imported Fire Ant Solenopsis Saevissima Var Richteri Forel written by George Leon Mason and published by . This book was released on 1958 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigations on the Biology and Biological Control of the Fire Ant Solenopsis Saevissima Richteri Forel in Uruguay Final Report written by Aquiles Silveira Guido and published by . This book was released on 1965 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Foraging Habits and Effects of Improved Fire Ant Solenopsis Saevissima Richteri Forel on Some Arthropod Populations in Southeastern Louisiana written by Nicky Lynn Wilson and published by . This book was released on 1969 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Isolation and Identification of Geraniol from the Imported Fire Ant Solenopsis Saevissima Richteri Forel written by Rafael Apolinar Sarmiento and published by . This book was released on 1969 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigations on the Biology and Biological Control of the Fire Ant Solenopsis Saevissima Richteri Forel in Uruguay written by Aquiles Silveira Guido and published by . This book was released on 1967 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
