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Show Utah Academy of Sciences, Arts and Letters 136 Gqraulus oermicularis cave (Gould). Cave Lake Canyon, marginal vegetation in . lakes; Johnson Canyon, in rotting Chara. Physa ampullacea (Gould). Cave Lake Canyon, marginal vegetation in cave lakes; Johnson Canyon, marginal vegetation of small stream. Phusa oit qata (Gould). Johnson Canyon, in rotting Chara. The following records, hitherto unpublished, are from the same gen and Physa eral region: Pisidium variable (Prime), Physa ampullacea (Gould) oirqata (Gould), Cottonwood Canyon, 6 miles northwest of Kanab, April 16, , 1940, N. W. Riser, C. M. Greenhalch. coll. Elevation about 4800 feet. Climbing Cutworms George F. Knowlton Utah State Agricultural College Climbing cutworms have destroyed fruit blossoms and foli apricot and peach trees in Utah during early spring of various seasons. Damage also has occurred less extensively to other trees and bush fruits. Such injury has been observed by the age on writer in Grand, Davis, Utah, Salt Lake, Box Elder, Cache and Weber counties. Reports of additional damage in these and other counties, sometimes of serious extent, have been received hom various county agents and fruit growers. The most severe out break encountered by the writer occurred in Grand County during early spring of 1946. At that tine damage to peach and apricot orchards was estimated to have exceeded $35,000 at Moab. In jury was severe. but on a smaller scale elsewhere in the county. Climbing cutworm injury to blossoms again began to occur as first fruit buds appeared in early spring of 1947. Serious crop damage was prevented at Moab by prompt spraying of tree trunks and nearby soil with DDT at a strength of 3 pounds of 50 per cent wettable DDT to each 100 galloris of water. Early spring use of cutworm bait, and use of cotton or sticky bands on the trees ani other measures which might be ernnloved. The Effect of the Dichromate Ion on Algal Growth R. J. Hervey Bacteriologist, U. S. Dept. of Interior, Fish and Wildlife Service The necessity of using chemically .clean glassware for cultur ing algae is recognized generally among algologists. The com monest laboratory method for cleansing glassware uses acid dichro mate, a procedure possibly open to serious criticism because it is difficult to completely wash Cr207 from glass. Because dichromate is toxic to many microorganisms in minute concentrations, but little is specifically known concerning its effect on algal growth, the following investigation was made. |
