AlB—Lancaster Fanning, Saturday, February 12,1983 NEWARK, Del. Every winter a few growers lose a large part of a broiler flock during a ventilation failure on a cold winter night. The malfunction may be caused by improper management or loss of electrical power. In ' er case, the proper emergency ycedure is simply to revert to .ural ven tilation. If this isn’ lone soon enough, birds will die What causes, their death? And how much time does a grower have to save a flock? Norm Collins, agricultural engineer with the Unviersity of Delaware’s Agricultural Ex periment Station, says that high room temperature and relative humidity, rather than the levels of carbon dioxide or oxygen, are the lethal factors in such flock deaths. Furthermore, mortality occurs sooner in houses designed to reduce energy consumption. In fact, the adoption of energy con servation techniques (more in sulation, limited area brooding and automatic inlet systems to reduce heat loss due to infiltration) has increased the potential for loss during ventilation failures on cold winter nights, reports the engineer. In case of a power failure, birds in an airtight house are in greatest jeopardy. And the warmer it is outside when the ventilation system fails, the sooner mortality will occur. For example, if the outside temperature is in the mid forties, birds over 30 days old con be expected to die within 3 Vt hours. After 14 days of age, broilers DIVERSIFIED ROOFING CO. Re-Roofing Specialists Shingles, Painted Steel, Hot Build-Up Roofing Siding & Spouting Galen Smoker 215-593-2887 NewTemik® on Gypsum It goes down smooth. Now the best granular pesticide you can buy is even better Introducing new TEMIK* 15G aldicarb pesticide formulated on gypsum the most trouble-free TEMIK granule ever developed. You’ll see why new TEMIK is better the minute you open the new easy-pour spout The round gypsum granules resist clumping, resist clogging, and flow smoothly through the applicator tubes for a more even distribution And they're more efficient Gypsum granules are so compact, you can pour more TEMIK 15G into the applicator box and cover more acres per f ill-up. No granular pesticide is more convenient. Or more effective TEMIK protects plants from underground pests like nematodes and root maggots Then works systemically to control aphids, mites, plant bugs, thnps and other foliar insects Crops grow their best - and yield their best - when they're protected with TEMIK New TEMIK 15G aldicarb. Performance made it the best Gypsum makes it better. Contact Us For More Details P.L. ROHRER & BRO.. INC. SMOKETOWN, PA PH: 717-299-2571 Act fast to save flocks if ventilation fails produce enough heat to raise room temperatures above the normal brooding temperature. In older birds, room temperature can easily exceed 100 F. But mortality isn’t limited to older birds. Young broilers in limited area brooding systems are also vulnerable. The five to seveft days prior to the day of partition removal are critical in limited area brooding, from a power failure standpoint. In the case of one-half house brooding and during the critical period (23- 28 days), mortality can be ex pected in an airtight house about two hours after the ventilation system become inoperative. In the case of one-third house brooding during the first critical period (13- 18 days), broilers will die within three hours of a power failure if emergency procedures are not initiated. When a ventilation system fails there is a rapid rise in room temperature. After an initial jump in temperature, the rate of heat production by the broilers tends to equal the rate of beat loss from the building. But since beat production is still greater than heat loss, the temperature continues to rise. I SPECIAL NOTICE I At some point broilers then begin to die and heat production declines. This allows some birds to survive. After a large part of a flock has died, the room temperature will drop rapidly. If this happens, a grower entering the house some time later may not be aware of the high temperatures which were reached. Even in older, less well insulated houses, infiltration from typical ’rip'f and thermal forces on the UNIVERSITY PARK - Results of multi-state research and Ex tension programs, combined with industry, county Extension agent, and grower experiences are now available for only $3. The 1983 Pennsylvania Commercial Vegetable Production Guide contains the latest recom mendations. The Guide is intended for the commercial vegetable grower who has to make managerial decisions. Included are latest in proper Cerogras® IMPROVES BREEDING IN DAIRY CATTLE CASE HISTORY #1 Leo Hanno ■ Glennfield. NY "We have used Cerogras for 2 years. Our cows clean better, have fewer cystics and show stronger heats... We have a 20.900 lb herd I average with a services per conception rate of 1.5" Cerogras Can Help Your Breeding Program WHAT MORE CAN WE SAY! Cerogras is a product of 4722 Broadway Kansas City, Missouri 64112 SEE US AT LANCASTER CO. DAIRY DAYS - FEB. 28. MARCH 1 ’B3 Pa. commercial vegetable guide CASE HISTORY #2 Dan Roggie • Lowville, NY “Our 101/2 year old cow had not come into heat for 3 months. We started feeding her 4 ounces of Cerogras S' • daily. She came into stroi heat andis now bred." H** I . I ■ ■ • »■*■- ■ peninsula is not great enough to prevent lethal conditions, warns Collins. The time required for lethal conditions to develop will simply be longer. Collins lists several recom mendations for growers: • Install, maintain and use a thermal alarm system. • Depending on broiler age, set the ahum for 10 to 15 F above the desired room temperature. • Because room temperature increases ranidlv when a ven- choice of vegetable variety, her bicide, pesticide, pesticide equipment, fertilizer and cultural practice. New varieties and strains are being constantly ' developed throughout the world. The primary purpose of this Guide is to provide up-to-date information on the practices of vegetable production where changes in recom mendations frequently occur. A few of the important change in the 1983 edition of the Guide LOCAL DISTRIBUTORS - • ANIMAL MEDIC, INC. - Route 181 - Manchester, PA 17343 Toll Free: 1-800-632-1831 (PA Only) 1-800-233-1956(Outside PA) • INTERNATIONAL STOCK FOOD (ISF) - Waverly, NY 14892 Toll Free: 1-800-847-1691 (Outside NY) 1-800-252-4620 (New York State Only) • J.L. HOFFMAN INC. ■ 1413 Court - Allentown, PA 18101 Ph0ne:(215)432-4466 Illation system fails, check' broilers immediately after the alarm sounds. • If you are aware of a power failure, don't wait for the alarm. • Start natural ventilation in the house by opening curtains or windows and doors. • Check broiler house at frequent intervals until power is restored. • Use room temperature as a guide for natural vintilation. • Watch for changes in weather conditions. include: changes in liming recommendations, better storing and handling of pesticides, new vegetable varieties including new types of supersweet com, and changes in pesticide restrictions. Copies are available for |3 from County Extension offices. CASE HISTORY #3 Donald Parks • Athens, PA "Less than a month after we started feeding Cerogras, the cows started bulling like crazv! 90% of the cows show good strong heats. Our breeding in terval is better than ever..."
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