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Lethbridge Herald Newspaper Archives

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Lethbridge Herald, The (Newspaper) - November 12, 1974, Lethbridge, Alberta Tuetday, November 12, 1974 THE LETHBRIDGE HERALD 9 Research Station report Breeding crops for disease resistance By DR M R HANNA Forage Legume Research Disease organisms and insects attack almost ever> field and garden crop from the moment it is seeded until it is harvested Millions of dollars are lost every year because of such attacks, but the losses would be far higher without the control programs that are developed through agricultural research One of the most effective and economical means of control is to develop crop varieties that have some form of built-in resistance to the attacking organisms Ideally, a resistant varie- ty represents a neat, ins- tant solution to a disease or insect problem and eliminates the need for cultural or chemical control methods In practice, resistant varieties rarely provide ab- solute protection For many diseases, however, crop resistance is the only feasible solution, and it is generally recognized that the breeding of disease resistant varieties is one of the most significant contributions of the plant breeder Some notable successes have also been achieved in breeding for resistance to insects and nematodes Among forage legumes, alfalfa has received most attention from plant breeders because of its im- portance as a hay crop The alfalfa breeding program at the Lethbridge Research Station has led to the development of varieties and strains resistant to bacterial wilt and stem nematode diseases We have now started breeding for resistance to crown bud rot and winter crown rot of alfalfa The development of a re- sistant variety of a crop may be a long and difficult process Thousands of plants, introduced from many different sources, may have to be tested for their resistance to the par- ticular organism in question Special techni- ques often must be developed for the testing procedures The research is always complicated by the fact that the breeder must deal with two sets of variables the heritable characteristics of the host plant and the heritable characteristics of the dis- ease pathogen In breeding alfalfa for resistance to crown bud rot there is the added problem that the disease is caused by a complex of STORES Guaranteed traction lor FREE INSTALLATION! TOWN COUNTRY NYLON WHITEWALL S.ZEF78 is ONLY Real bargain for owners of Fords, Chevs and Plymouths that take F78-15 on their cars Twin stripe styling1 Husky 4 ply nylon strength to pull you through winter after winter We Guarantee Everything! several fungus organisms The breeder has to be cer tain that the variety he develops will maintain its resistance to attack under the broad range of con- ditions to which it may be exposed in the field The existence of different races or strains of the attacking organism, particularly for certain dis- eases, frequently com- plicates the breeder's task The development and spread of new races may make a previously resis- tant crop variety obsolete within a short time Thus, a continuing program of breeding for resistance to such a disease must be carried on The results of the plant breeder's research are evi- dent in the broad array of resistant crop varieties available to farmers BOW ISLAND CO-OP AUCTION "Southern Alberta's Newest Auction Mart REGULAR SALE EVERY MONDAY a.m......................HOGS p.m........... MIXED CATTLE SALE EVERY WEDNESDAY- Hog Assembly to 12 Noon Frad Fisher (Licensed) lor Branding, Vacinating and Pregnancy letting, Facilities for after sale 20'i40' Hog Barn in connection BOW ISLAND CO-OP AUCTION Vi Mile East, Mile South Bow Uland Phone 545-2609 P.O Box238 LETHBRIDGE FARM EQUIPMENT LTD. 1263 Second Avenr MTF-nDUCiNG... 176 PTO HP, 213 max eng HP 3 on-the-go choices in each of 4 Self-cleaning air induction system independent ateerIng 3-poinl hitch lifts heaviest Im- plements over USED MACHINERY Ready For the Field Morris 36" Rod Weeder 1500.00 David Brown 950 D 3 pt. hitch 2150.00 Oliver 1850 D cab 4 wheel drive, new tires 7500.00 Minn. 705 D. Cab, duals. 3550.00 Allis 1969 Model D21. 18 4x38 dual. 8950.00 Case 1032 D. Cab, 18.4x34 duals, 1970 model. 9500.00 Massey 165 Gas, like new, 53 hrs., pt. hitcji, multi power. 6950.00 D21 Allis new 24.5x32 tires, 3 pt. hitch. 8950.00 Case 831C Dsl. hdr., 3 pt. hitch. 5200.00 D2 Cat w.hyd dozer. Ser. No. 5417192 D2 Cat. Ser. No. 5416872 Case 930 Ck Dsl 18.4x34. 7200.00 Also an unlimited amount of 14 ft. rails. kill from 3" to 6" tra Plus the Best Price on Garden Tractors in the South ;