Annual report of the Agricultural Experiment Station of the University of Minnesota . d be better treated, of course, with the spraypump and the more disagreeable fish oil and kerosene lard used in these experiments was rancid, perfectly good forthe purpose but not saleable for culinary use. Not only HornFlies but the Stable Fly, Stomoxys calcitrans, Linn., and the com-mon Green Bottle, Lucilia cornicina, Fab., and Flesh flies, Sar-cophaga carnaria, Linn., were effectually kept at a distance by thetreatment referred to above as the best. INSECTS INJURIOUS IN L902. 15 Treatment in t
Annual report of the Agricultural Experiment Station of the University of Minnesota . d be better treated, of course, with the spraypump and the more disagreeable fish oil and kerosene lard used in these experiments was rancid, perfectly good forthe purpose but not saleable for culinary use. Not only HornFlies but the Stable Fly, Stomoxys calcitrans, Linn., and the com-mon Green Bottle, Lucilia cornicina, Fab., and Flesh flies, Sar-cophaga carnaria, Linn., were effectually kept at a distance by thetreatment referred to above as the best. INSECTS INJURIOUS IN L902. 15 Treatment in the case of very large herds is naturally besetwith difficulties. Moist weather, by keeping the dung moist for alonger period is most favorable for the development of the HornFly, while any method of destroying the dung will lessen thechances for its successful increase. A decoction of a species ofSmart Weed {Polygonum pennsylvanicum) was tried, one poundin three quarts of water boiled down to two quarts, with absolutelyno results. It is to be hoped that none of our farmers will be. Fig. 33.—A species of Smart Weed (Polygonum pennsylvanicum). led to follow the example of a gentleman living at Hills, Minne-sota, who unwittingly applied machine oil to a valuable horse withvery serious consequences, the hair coming off completely andleaving the skin in a raw, sore condition. We realized no bad ef-fects in this way after treatment with the above compounds. This year the Horn Fly began to be troublesome early in Au-gust. A few individuals can still be observed about the cattleat this date, Oct. 6th. It is perhaps of interest to note the factthat while Flesh flies and Green Bottles frequented the surface 36 INSECTS INJURIOUS IN 1902. of comparatively fresh and drying dung in egg laying, the Hornfly visited it for the same purpose only just as it struck the ground,it required a quick eye to note their actions before they were backagain upon the cow. Prof. Weed, in Bulletin No. 28 fro
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