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Lethbridge Herald Newspaper Archives

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Lethbridge Herald, The (Newspaper) - July 10, 1973, Lethbridge, Alberta -Tuofday, July 10, 1973 THE IETHMIDGE HERALD J LOW-YIELD RANGELAND PROBLEM Research station reports 'STRIP RENOVATION' COULD SOLVE House fly still a pesky problem By JERRY WEINTRAUB Entomologist Lethbridge Research Station Probably you have heard the old story, about (tie blacksmith who was hired by a bakery bis job was to "shoe" flies. It sounds antiquated in this day of bug bombs but at a re- cent meeting on animal waste pollution, the control of house flies was considered to be a top priority problem. Domestic flies include a va- riety of species; the main one -is the house fly, but various blow flies (bluebottles) are also of importance. These flies breed in animal wastes, refuse, and other organic debris. There- fore, effective control practices must include adequate sanita- tion measures. The house fly is a feature of oar surroundings but it is amaz- ing how often other flies, such as the cluser fly and stable fly, are mistaken for it. House flies are dusky grey and about -one quarter of an inch in length, with four dark stripes on (he thorax and a dark central area on the abdo- men. Their large, compound eyes are reddish brown. The have pad-shaped mouth- parts, which constantly extrude droplets of moisture. Disease organisms end parasites are transmitted by these droplets, and also by contact with other parts of the body. The house fly has four stages of development: (he egg, larva or maggot, pupa and adult fly. They reproduce very rapidly, a female being capable of laying over eggs, mainly in piles of manure and other organic matter. The tiny, white legless mag- gots reach their full growth of half an inch in less than a week. It has been estimated that a ton of manure may con- tain almost a million maggots after only four days exposure to egg laying. The mature maggots migrate to drier parts of the pile and change to smooth, brown, bar- rel-shaped pupae and the adult flies emerge hi about a week. There are many generations in a season, with increasing numbers of flies being pro- duced. Sanitation is important in their control because the house flies can readily develop resis- tance to the commonly use orgaoochlorine and organophos- phorous insecticides. Removal and spreading of manure should be done fre- quently, combined with regular treatments of the manure pile with an insecticide such as xnal- attubn. Insecticides can also be applied to walls where the adults rest, or used as space sprays or baits. Very often tbe breeding sites are missed, or as in feedlots, are too close to the animals' fodder to risk contaminating the feed. Several registered in- secticides are available to use. By SYLVEB SMOLIAK Dryland Pasture Specialist Lethbridge Research Station The production on ing rangeland can be signifi- cantly increased by to introduced species of forage. The present method of com- plete tillage of rangeland is relatively costly and two to three years normally are re- quired to establish a stand. To find a way to lessen the cost and the period of non-use, a method of strip renovation was tried at the Manyberries re- search substation. It was believed that by leav- ing strips >of unfilled native prairie between tbe seeded rows, the risk of erosion would be reduced and some grazing would be made available while the stand was being established. Then, when tbe seeded grass was fully established, tbe na- tive grass could be tilled, leav- ing the seeded grass in widely spaced rows. In the experiment, alternat- ing strips of tilled and unbilled native prairie varied from six to 48 laches in width. Russian wildrye was seeded into the centre of each tilled strip. Completely tilled and control plots of native prairie were in- cluded in the test for compari- sons. Seedling establishment of Russian wildrye was best on completely tilled plots and poor- est on the six-inch tilled strips. Strips 30 to 48 inches wide had as many seedlings as the com- plete-tillage plots, but the plants developed more slowly. By the second and third year after seeding, complete tillage produced the greatest yield of Russian wildrye twice as touch as- on the best strips. Yields of Russian wildrye on the 48-inch strip were 220 pounds per acre and on the 24- inch strip 300 pounds as com- pared with 580 pounds on the completely tilled plots seeded in 24-inch rows. Some increase in native for- age production occurred on the unfilled strips, but it was mainly fringed sage, which is relatively unpalatable to cattle during the summer. When cattle were allowed to graze the vegetation on the strip renovated areas they preferred Russian wildrye to tbe native vegetation. The Russian wildrye was grazed to ground level and lit' tie use was made of the native forage. Therefore, this method of range renovation has not satisfactorily reduced the per- iod of non-use, nor has it im- proved stand establishment. McCleary Farm Implements Supply Announce the OPENING of the LOCKWOOD DEALERSHIPS ah 2636 2nd Avenue North, Lethbridge Phone 328-5374 SALES SERVICE PARTS LOCKWOOD POTATO EQUIPMENT LOCKWOOD BEET EQUIPMENT LOCKWOOD IRRIGATION SYSTEMS LOCKWOOD HARDfE SPRAYING EQUIPMENT WATCH FOR GRAND OPENING ANNOUNCEMENT Make Plans Now to Attend This Year's Exciting Edition of PRE-EXHtemON EVENTS LIGHT HORSE SHOW JULY 9-12 OUTSIDE SHOW RING 4-H SHOW and SALE JULY 10-11 EXHIBITION PAVILION EXHIBITS and CONCESSIONS In LETHBRIDGE JULY 16th to 21st! BAND CONCERT JULY 15 P.M. JAPANESE GARDENS PARADE JULY 16 940 AJYL STAGE SHOWS (Grandstand) IBtOY VAN DYKE SHOW JULY 16-17 8 P.M. THE SILVER SPURS JULY IB PJKL RODEO and CHUCKWAGON RACES JULY 19, 20, 21 8 PJW. GRANDSTAND YOUTH EXHIBITION JULY 16-21 YOUTHARAMA BUILDING CASINO (Daily) JULY 16-21 12 NOON TO 2 AJN. 4-H BUILDING HORSE RACING DAILY July 16 21 POST TIME PJM. GRANDSTAND BEER GARDEN My 16 21 12 noon to MIDWAY Jolt 16 21 Tho Thomas FOOD FOR YOU Jwly 16 21 11 a.m. to 9 p.m. SPORTS CANADA MyU 21 10 a.m. to 10 p.m. wfftoop Up Compound KIDDIES' ZOO July 16 21 11 a.m. to 9 p.m. Whoop-Up Pavilion LIVESTOCK DISPLAY July 16-21-1 11 to 9 P.M. Whoop-Up PaviRM ;