Louisiana Conservationist, Vol. 59

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Excerpt from Louisiana Conservationist, Vol. 59: March-April 2006The weevils in and around the plot were counted monthly to monitor their rate of reproduction and their migration onto thesalvinia mat away from the point of release. The weight of salvinia within the plot and the damage incurred by its ter nal buds, which are the weevil's favorite lunch and the plant's primary means of reproduction, were also assessed during each monthly visit.The weevils did multiply as expected and they survived below-freezing winter temperatures (17° F). Migration of the wee vils beyond the test square was evidenced by streaks of browning in a spoke - like pat tern radiating outward from the release point. It should be noted that the weevils are able to ¿y for short distances.As the weevil population increased, a gradual decrease of S. Molesta was observed, first within the test square and then throughout the entire experimental end of the pond. The decline continued until mid - October 2003, when no salvinia could be found in the test area. The con trol end of the pond, however, which had not been seeded with weevils, still exhibit ed a solid mat of the weed as well as an increase in weevils that had moved in from the test area, and had begun to reproduce.The salvinia and the weevils went into dormancy with the onset of winter, which brought heavy rainfall. Most of the salvinia in the control end of the pond, which was now loaded with weevils, was ¿ushed through the drainpipe into Toledo Bend, thus naturally seeding the reservoir with weevils.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.