Lethbridge Herald, The (Newspaper) - March 19, 1974, Lethbridge, Alberta
Tuesday, March LETHBBtDQE HERALD 3 Cutworm detection uses sex attraction By DR. DEAN STRUBLE Organic Chemist Cutworms attack a wide variety of crops and, because they generally feed on the parts of the plants below the ground, they frequently remain undetected until crop damage is extensive Therefore, it is important to develop an easy and inexpensive way to detect these pests before they do damage The populations of the larval cutworms and the probability of damage can be forecast by determining the numbers of adult cutworms, which are moths. However, surveys are difficult since many non- economic species of moths will be caught and the cutworm adults are not easily distinguished from them The problem of catching only the pest species is extremely important At the Lethbridge Research Station, we are working on methods of Mffiken Farai Supplies Ltd. USED MACHINERY N.H. 68 overhauled N.H. 78 Bator overhauled N.H. 268 Baler overhauled 269 Baler overhauled N.H. 277 Baler with hydraformatte, overhauled, 1 year old M.F. 10 Baler overhauled M.F. 9 Baler overhauled M.F. 12 Baler overhauled Case 330 Baler overhauled N.H. 1044 120 Bate Waoon N.H. 8-1049160 SP. Bale Wagon, only 56 hours '950 '1050 '6500 SWATHERS '1350 Versatile No. 10 20'P.T.O. Swather, like new.......... Versatile 103 iys.P.Swather I.H.C.175 16'S.P. Swather M.F. No. 36 16' S.P. Swather Miscellaneous '2300 '3500 Citation 14'House Trailer M.F. 12'Discer J.D. 100 24' Chisel Plow with rodweeder....... Melro 3 pt Hitch 20' Draw bar with Krause 298 O'Chisel Plow3pt.Hitch Cockshutt241 WDouMeDisc............ J.0.301 Fert Distributor J.D.A Tractor.................... '1000 '400 '2300 '450 NEW MACHINES Kkchnum DrMte Oyster Chisel Plows, frorn to ir on hand. READY FOR DELIVERY '3350 Discs and I WE HAVE MANY MORE USED TOO NUMEROUS TO USTI Mken Farm Suppfes Ltd Island Implements MS-2121 BOW Phone S45-2121 determining the populations by trapping the moths using sex attractants These are chemicals with characteristic odors that the female moths produce to attract the males at mating time Each species of cutworm has its own sex attractant When traps are baited with a specific attractant, only males of one species will be caught and the problem of identifying the moths is solved. Compound At present, we are determining the chemical nature of the attractants produced by some of the cutworm pests These compounds are frequently complex and their structure must be determined with gieat accuracy since minor changes can make the compound completely useless as an attractant Equally, the synthetic attractants must be released from the traps at concentrations very similar to those produced naturally by the females, otherwise, the males may not be attracted The quantity of chemical required is normally very small, and one ounce should be sufficient to bait traps for the season SEA ANIMALS More than four-fifths of the world's animals live in the sea. ransportatlon Ltd. General Bulk Commodity Hauling -FLAT DECK TRAILERS 614-4th Streets. Lethbridge "SERVICE ISN'T OUR MOTTO-IT'S OUR BUSINESS Phone 328-8762 Phone 327-0591 7th ANNUAL WISHING WELL SALE Hurt 1015-15ft SI. S TIM Pint Lucky Wimwr 3 ToGo SMITH'S COLOR TV ft APPLIANCES 236-13th SLN. Phono 328-5541 CtoMd Open Fri. till pjn.