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Lethbridge Herald Newspaper Archives

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Lethbridge Herald, The (Newspaper) - September 10, 1971, Lethbridge, Alberta R THE LETIiCRIDGE HERALD Friday. September 10. 1971 Growing restrictions Pesticide research continues SPRUCE GALL APHIDS This sequence shows the slages of Spruce Gall Aphid damage to the Irees in the area. Healthy cutling on left, shows the start of Ihe while the early in season sample shows the start of ihe growl h. The mid-season sample shows definile gromlh with Ihe mature sample covered. The results of the gall are evident with last year's gall causing a complele kill. Spruce Gall Aphid causing concern control methods difficult hut possible Spruce Gall Aphid is quite prevalent in the County. Tile galls. Lelhbridge caused by aphids, appear on the growing tips of spruce trees, do n o t cause serious injury to the tree unless heavy- infestations are very However. Spruce Gall Aphid does give a rather unsightly appearance to the tree, CONTROL Spray control is nol as easy as one might think. The reason Grasshoppers outbreak predicted An outbreak of grasshoppers similar in proportion to that which plagued the prairies throughout the 1930s could be in the offing for Canada in 1973, said Dr. Neil Holmes of Letl? bridge. Dr. Holmes, head of the entomology section at the re search station, speaking in Vic- toria, said grasshopper popula- tions are on the rise in all prov- inces from B.C. through Mani- toba. In all four provinces, he said, there are currently heavy in- festations in isolated areas. In Ihe Cranbrook area of south- eastern B.C., for example, grasshoppers averaging about 200 per square yard even killed spruce trees this year by eating their bark. Dr. Holmes is in Victoria this week to attend the annual meet- ing of the Entomological Society of Canada. The type nf situation that ac- tually will develop will depend to a large extent on weather conditions over the next two years, but Dr. Holmes said "all indications point to a mod- erately heavy infestation next year." The 1372 outbreak, he said, will likely be comparable to a generally heavy outbreak about seven or eight years ago, but it will be the year after that the situation would become most acute. Dr. Holmes said the situation could change so greatly over a short period because only a small change in the rate of sur- vival of the young is needed to generate enormous increase. being is that while the aphids are in the gall the spray will not reach them, and thus no effective control is obtained. One must try to aphids with spray are not in the gall. catch the when they These times van' each year so no specific week for spraying can be given. One must link their time to spraying with clues obtained by observing the tree. METHOD In the spring, if a white cottony material appears on the tree, apliids are present. This is the egg stage. Spraying should begin when tile brown membrane over the new needle buds rupture. Spray every four days for four times with'Malathion 50 per cent B.C. Li mid summer the galls dry, causing the needles to relax, resulting in many openings through which winged aphids emerge. The winged aphids go to an alternate host. They re- turn to the spruce tree to win- ter. Spraying ir.alathdon in mid October will kill this overwin- tering stage. Spray when the temperature is greater than 60 degrees. If only a few galls are pres- ent and the tree is not too large, control can be obtained by picking the galls off and burn- ing them while the aphids are still inside. This is probably best done in July. For furtlier information con- tact your district agriculturist. at one ounce water. per gallon of 4-H club news The Barons-Noble 4-H Grain and Garden Club travelled to the Brooks Horticultural Sta- tion Aug. 1 and was taken on a tour of tlie grounds by Miss Debbie Roy. Following the tour there was a swim and picnic supper at Lake Newell. Aug. 4 was the first plot tour Vegetable trials at Brooks help commercial growers Approximately 700 varieties of 50 different kinds of vege- tables are being tested at the Alberta Horticultural Research Center at Brooks this summer and at the center's Strathmiorc sub-station. Staff from Ihe Olds. Vermilion and Fain-lew col- leges are also involved in the testing proRrams. The varietal, cultural and breeding programs are again being directed mainly towards commercial vegetable produc- tion, said Dr. A. 0. Olson, di- rector of the research center. He said the trials at the Strathmore sub-station have been considerably expanded this year, particularly those in volving leaf, cole and salad crops. Results obtained in Ihe 1970 trials suggested that the higher relative humidity and lower erage temperatures in this lo- cation are an advantage to these crops and that they de- crease the incidence of such di- seases as tipburn in lettuce and blackheart in celery. According to Dr. Olson, these trials are very important for determining the suitability of new varieties, compared wilh presently grown varieties. The wide geographical distribution of tesitng sites is directed, he said, at assessing the potential of the plants under the varied SAVE YOURSELF A MOTOR WHEN YOU BUY THE SOLO COMBI One gas engine drives a whole family of indis- pensible garden imple- ments. EASY TO CHANGE NO TOOLS REQUIRED Solo Combi Attachments Lawn Grass Cutten Rotolilleri Water Pumpi Boat Motors Generator! Snow Bio wen All Dealer Inquiries Are Invited Diilribulor for Albtrto and Saikalchowan 817 3rd Ave. S. Phono 327-2669 environmental conditions with which both commercial and home gardeners must contend. This year the center's breed- ing programs are being de- voted to lomaloes and peppers and are being carried out in conjunction with pilot projecls in the Rolling Hills. Medicine Hat, Tabcr and Coaldale areas. Sucli tomato varieties as Red Bobs. Globetrotter, Brookpact ano Brookpack, all well suited io commercial production, are being added to under the cen- ter's breeding program. followed by the final lour Aug. 11. The following winners announced were: Senior grain, Randy Mc- Intosh; intermediate, Rober- ta Rogers; Diane Rogers, Tom Rogers; junior rod row, Willie Groten; Bobby Rogers; second year garden, Duane Erickson; Reese Mclntosh; Wanda Luchia; tliird year garden, Tim Mc- Inbosh; best plot sign, Reese Mclntosh. The Club will enter a Thcrca- tic Display at the Nobleford "The popular opinion seems to be that the Canadian agri- cultural industry has been drag- ging its feet in restricting the use of chemical said Dr. C. R. Harris of the Canada department of agricul- ture's London Research Insti- tute. "But the record shows other- wise. "In fact, many of the restric- tions (hat have been introduced in recent years are based, in part, on research conducted by the CDA, including studies a the London Research Insti he said. For example, a 3884 survey 01 insecticide residues in soils let lo changes by 1966 in agricul wsmess ormafion Calculators help stabilize cattle and hog markets Have you heard about the cattleman's or the hogman's calculator? Both are designed to quickly and accurately de- termine the maximum price you can pay for feeder cattle or feeder pigs in relation to grain prices, feed conversion rales and expected selling prices. The inventors, Frank Kehoe and Will Pattison are econom- ists with the Alberta depart- ment of agriculture. They en- visage their calculators will add stability to both the beef and hog feeder markets by pro- viding cattle and hog men with information on price and cost relationships. Too many farmers and feed- ers market grain through feed- er below price know when they purchased the ani- mals. cattle and pigs at a price the established grain because they did not Ihcir break-even price Mr. Kehoe, the inventor ofi It tells the maximum the c a 111 a m a n's calculator, says both he and Mr. Pattison have been very concerned about the instability of live- stock markets for some time, and that it was this concern that prompted them to come up with their pocket-sized, circu- lar slide rules to eliminate some of the unknowns that con- tribute to this instability. The simple design and ease of manipulation of the calcula- tors make it possible for any- one to do an "on-the-spot" check of price and cost rela- tionships in a matter of sec- onds. The cattleman's calculator allows individual calcula- tions through combinations of the weight of the feeders to be purchased: the expected, or hedged, selling price: the cost per pound of grain; and the de- termined break-even price. one can pay for price various weights of feeder cattle and still cover costs In relation to various finished cattle prices and levels of production costs. It tells the minimum price one must receive for finished cattle and still cover costs un- der various feeder cattle prices, weights of purchased feeder cattle and levels of pro- duction costs. It also tells the maximum cosls per pound of grain one can incur when feeding cattle, considering various finished cattle prices and feeder cattln prices, and still cover costs. The hogman's calculator Is similar, Both the cattleman's and the hogman's calculator can be used in Canada, the United Slates and Australia. They can be. easily adapted for use in any country in the world. Rapeseed insect control deadline is November 15 tural recommendations govern- ing the use of organochlorine insecticides such ns DDT, diel- drin and hcptachlor in Ontario. Tliat survey showed there were significant residues of these insecticides in orchards, vegetable and tobacco soils. "The soils containing these significant residue levels com- prise only 0.13 per cent of the total land area of Ontario, and only 2.4 per cent of the land devoted to commercial farm- said Dr. Harris. 'So, even though relatively high levels of residues are pres- ent in these particular soils, they are concentrated in small, isolated pockets." But as a result of die study, farmers were advised to stop using DDT and other organc- chlorine insecticide on many crops. The surveys were continued and showed that insecticide res- idues reached a peak in or- chard, tobacco and vegetable soils in 1966, and have been declining since then. By 1909, residue levels were generally lower than Ihcy were in 19G4. "Residue levels should drop even more significantly in the next five says Dr. Har- ris, "because there are now new restrictions against the use of organochlorine insecticides.11 Other studies conducted at the London Research Instituts showed that some insecticide residues, such as dieldrin and hcptachlor epcxide, were ab- sorbed by some crops. Root crops, such as carrots, absorbed the greatest amounts. "The extent to which these insecticides were absorbed de- pended on the specific insecti- :ide involved, its concentration in the soil, soil type and cli- said Dr. Harris. "However, residues in crops 'or human consumption were only a fraction of the toler- ances established by the Food and Drug Directorate of the de- partment of national health and welfare. "In other words, there was no lazard to human he says. Another study at Hie London Research Institute did indicate, lowever, that there was a po- .cntial problem with crops jrown for animal consumption. Some of these crops can ab- New DR. D. L. STRUBLE Organic Chemist Cutworms and other insect pests such as grasshoppers have been controlled until re- cently mainly by the chlori- nated hydrocarbon insecticides. Insecticides of this general class are chemically very sta- ble and are now known to per- sist for years in plants and soils. Because the continued use of chlorinated hydrocarbon insecticides could cause en- vironmental pollution, it is im- portant to find less persistent insecticides that will control j our agricultural pests. Organophosphorus 1 n s e c t i. oiclcs appear to be suitable al- j tcrnativcs, as most of them are j readily degraded in plants and soils. At the Lethbridgc Re- search Station one new organo- phosphorus insecticide, known by previous tests at the Sta- tion lo control cutworms, was applied to wheat in experimen- tal plots lo determine its presistence under field condi- tions. Our chemical analyses indicate that the insecticide it- self and tlie two main chemi- cals that are produced as it de- composes do not persist on the plants longer than four weeks after application. Thus, we liavc evidence that the use of this organophosphorus com- pound will not create tire resi- due problem on plants that ac- companied the use of persistent i r g a n o chlorine insecticides. The results of our experiments anrl those can-led out by the manufacturing company indi- cate that Ihis insecticide may be registered for use against cutworms within n year. To snfeguiml against an ac- cumulation of toxic chemicals in tho environment from Uio continued usa of Oils inscctl- Horticulture Show Aug. 23. The Garden Achievement Day was held in the Noble Central School Sept. 2 at p.m. CLUB Rccsc deadline for applications under the Alberta government's rapesecd insect control assistance program is November 15. Application forms for growers who are eligible for government assistance have sent out (o county, municipal district and improvement district secretaries. The government is paying an acre towards the cost of either dj'Iox or lannate used on rapcseed crops in the recent emergency. This assistance does not apply to flax, alfalfa, sugar beets or other crops where spraying is more or less a routine operation. Approximately 300.000 acres of rapcsccd crops were treated with cither dylox or lannalc during the recent outbreak of beet webworms and bertha armyworms. Although statistics have not yet been compiled, this figure could represent as many as farms located in virtually all regions ol the province. The government decided to provide financial assistance because of the much higher cost of lannate compared with DDT. DDT would nave cost in the neighborhood of 50 cents an acre, compared to the cost of lannate at per acre. Other factor? which influenced decision included the desire to encourage rape-seed production In Alberta and the shortage of cash among many fanners. Rapcseed producers applying for financial assistance under the government's insect control assislance program will to answer such questions as the chemical used and the rate of application. These questions are being asked so that the department of agriculture can evaluate insecticide residues from Hie soil. Animals tend to concentrate minute quantities of insecti cides fed to them in contaminated crops and, based on this act, scientists predicted thai o r g a n o clilorine insecticides might, in some instances, reach unacceptable levels ir milk and perhaps other animal iroducts. Subsequent studies in Ontario confirmed this prediction. They were conducted by (he Food and Drug Directorate, and the food Pesticide Laboratory of he Ontario department of agri-ulture and food. "It was largely for this rea-on that the use of aldrin, dieldrin and heptachlor was banned n Ontario in said Dr. Harris. CORN BLIGHT The U.S. department of agriculture "News'" reports new outbreaks nf southern corn leaf blight continue to be recorded throughout the nation's com growing areas. Overall infection levels are light to moderate in the majority of places, but some localized increase in severity has program and pinpoint any weaknesses. Only in this way can improvements be nade in future operations. In preparation for possible future emergencies, the government is also arranging for automatic clearance of American aircraft fitted with spray-nR equipment; an inventory of chemicals and aircraft that are available, a schedule of recommended rates for aerial application and an expansion of research into chemical and other methods of agricultural insect appoiiilcd to FCC hoard Agriculture Minister II. A. (Bud) Olson has announced the appointment of Paul D. Nor-mandeau as a member of the board of directors of the Farm Credit Corporation. Mr. Normandeau is an Assistant Deputy Minister of the department of regional economic expansion. He succeeds Andre Saumicr, formerly an Assistant Deputy Minister of the same department, but who is now Assistant Secretary, Ministry of Stale for Urban Affairs. Normandeau joins four other directors of the FCC board of IfTHBfllDGE BESWRCH STATION n insecticide cide we shall continue to determine its persistence on other crops and in the various soil types in this area Our findings will help provide an early warning of any unpredictable deleterious IMMEDIATELY Two Top Calibre, Ambitious Salesmen To sell our exclusive line of 1972 aulomobiles coming soon. Full company benefits. Apply in person 1O: LORNE FRANZ FLEMING MOTORS ITD. 7th Si. and 111 Ave. South 'A TEENBURGER with each purchase of (Sso) gas al participating Eno Kalloni from September 4lh lo October 2nd, 1971 Oir.r >l participating A 1 W IrancllllKl unlll Oclotur 1 tlh, 1971 ;