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Show ' ,,, , a , - , , . - " ,' - '' - , ,,, 4, , - , - , Ile, . , - ,,, , - a . . , , , , - . - - . , . -- - - - , - L, - , . . , a ke- City is faced 'Salt - - . ' . , " . , - - . - , , , wsth the biggest, mosquito - Isk a - inrasiots 10 , . i l 1 -- , 1 , s I r; - - I . ' I ' , . , '' -- - -- 1 k , s, I , i . it - ... t 4 , - g --- , . I 0, , ti ...,,,,,77, . , , , ,.),t,- - ' , , , , . , YEAR can be the worst for mosquitoes in the of Salt Lake City! - i If it is, it won't b'è the fault Of the Salt Lake City, ...Mosquito Abatement District. Instead, Salt Lakers can blame the weather, because they-hajust experienced the heaviest, snowfall in the history of the valley.' The surrounding mountains of the Wasatch and Oquirrh . ranges are packed with a record snow in their 'canyons and. water' ' sheds. If Salt Lake City escapes with less than the worst invasion of mosquitoes ,iri its history, it can thank its mosquito abatement district, This team than a dozen men has . worked almost pare the valley for the spring thaw. If it had not, the vast area of flat- lands west of the Jordan River and the pastures along the valley stream ' beds would remain in a flooded condition foi weeks after the high of the runoff. . The water that remains in the. . and clogged streams ponds, puddles, - THIS , ,,,, s ' , , - t x, , 4,ss , . - . . ' ; , -- i . 1 i - c, , - I . , of-le- ss , , aiMMOnnnIEMIMEE1M.,m.INIMMOMIINIIIJ . t ' , al, 1 , . . e Continued - i . . ! ' . ,s I il .., 7 . . next pone ' I . , . : ,, v . ater top-feedi- ng - b o . , been installed to permit the drainage the flatlands, but not permit its reflooding when the ditch ' waterls high. Farmers, 'private duck clubs and federal bird refuges have been educated in the proper way to handle the water in their ponds, lakes and irrigation ditches. They know the importance of keeping and at a constant level. Where drainage,. is not possible the lakes and ponds are stocked with mosquito fish. These little minnows, "Gambusia affinis .af- finisrare among the 'finest weapons available to destroy the water form.. Last year there were 50,000 of these fish planted in ponds, silecorative pools, lakes and warm springs. Open drains that Were difficult to reach were not overlooked. The abatement district stocked 1326 pools, 187 drains and 43 lakes with mosquito fish. As soon as the warm weather of spring arrived, it was' necessary to start the inspection of water that could breed mosquitoes. Every five days an inspector checks all known areas by sampling the water with a dipper. If the number of tumblers or wigglers warrants immediate ac- -, tion and the area-i- s small, he will If spray at once with larvicide. the area is too large for one man, a the-W- , . ' . free-flowi- under-constructi- - . of water off - water-stoppin- . ; 1' and ditches will become The home of 'mosquitoes. In five and a hall days a mosquito can develop from an egg, passing through the stages 'of larva (wiggler) and pupa (tumbler), to an adult. - , .To stop this invasion these, mosquito lfghters strike at the weakest linkthe water-livin- g stages, or . tumblers. and wigglers Drainage or filling the breeding places and using larvicidal sprays are the best Methods for killing these mosquitoes before they become adults. 'Drainage projects have been extensive: Over 300 miles of ditches were dug, dredged, or cleaned of ice, g trash and vegetation.-These must be kept clean during' runoff. New drains to this system are and will include over 400 feet of culverts. Stagnant polo's, swales and depressions that can't be economically drained, have been filled with some 50,000 cubic yards of gravel, dirt arid rock. Dr..,P9n M. Rees is professor of biology at the University of Utah and the past president of the American Másquito Control Association, Inc. In. speaking of mosquitoes and Salt Lake City he says, "If it were not for this ditching and filling, the conditions in Salt Lake City this summer would be unbearable." Many automatic headgates have . . , ; . - ve ; . ' - .. 4 s , 4 - - , - , - -- - . ., . -, , . , . - 44', .4 ,:,,,, l,,.. t tth , ,, v - , , fs , 1 , . it' A - . - . f,..,,, ,1!.4 , , '. ' , , FEMALE Of the species is the only one who makes a pest of herself Four types of mosquitoes by biting. are common, but there ore 20 others. ., . , - . ,,. Itst. . , 4,, t" 7 ir - P - - it t, - ---, ; 3,1 rt...4,1 , , . -- .. . Tilt v ,. - '' - , i,1,,,-.- '. -- , - , i - ,, . -- By BOYD O. HATCH' 4, ,c , i y - - , .., been assigned to defeat it -- : 1 ,, 4 . .. ,- and a haildfut of men hare ' , ôO , . its history, a ' . a , - - 0,ddi , in - ftA - D1.1,:: 41.1k1)1. 4 5 nD- 4CI:'4 4,!tialatilq,' tz6.-- 1,1-A- , i, , , -- . . . , . - I , t - , , , ,,,,,, . ' , '''-'--- ----- . I , ; ii ". 4. - ,, . -- - , , , ,, ,, t , t. c ' . . , e , , 1, - , I . . d- -- ti ,.., i, '74 , - - - - THE SILVER STREAKS ARE FLOODED FARM ACRES AND WASTE LANDS WEST OP SALT LAKE 1 t ' - '' oestinNEWS ! , , ' ' . V, . aTY THAT OFFER IDEAL BREEDING CONDITIONS 1932 ., ' ' FOR THE MOStIUITO HORDE OF - , --- ' i MAGAZINE. SALT IASI (ITT; tiTA14Atalt ,' t -- - , : .,. - , ,.. . " .v. 1932 4. t I . |