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Show t and Garden Edition, Spring 1981 Extension agents helpful Problems of plant diseases are eyed As the growing season gets most underway county extension agents spend considerable time helping people with insect problems, weed problems and plant disease problems. The county agents are being trained to recognize problems and are by backstopped extension university specialists to help provide solutions. Sherman V. Thomson, extension University, said last year over 250 samples of diseased plants were analyzed at the plant disease clinic. In many cases the organism causing the disease was cultured The was pinpointed problem and appropriate control measures recommended. He said procedures have been worked out for this year to facilitate growth medium. plant submitting pathologist, Utah State the in in a special laboratory samples of plant suspected of disease. The agents have been trained in the procedures aimed to provide diagnosis and useful information for controlling the variety of plant diseases found in Utah. Both home owners and commercial they have. They know only that the crop or plant has poor growing qualities. diseases with chemicals. Interesting experimental results have been obtained in Utah from pressure injections of antibiotics into holes (Continued from Page 5) which are so important for plant good development. Another important soil climatic factor is soil temper atue. Seeds of various plant species require certain tem- If germination. are too temperatures cool in the spring, the seeds may rot before they can germinate and very poor crop stands will result. The proper soil temperatures for of most in the is crops germination garden peratures for proper order pF(alC!K30FG SoDSgD drilled in fruit tree trunks. This has saved trees with infected Western X that otherwise been have would destroyed. Mulch aids garden growers encounter plant disease problems. Yet, Thomson noted that often they are not aware of the problems He said most plant disease control to date depends on prevention. Only limited research work has been done on effective control of plant of 65 to 75 degrees. the During the spring when the surface soil contains a lot of moisture the evaporation processs perature. Organic utilizes energy from the sun that would otherwise heat the soil. The use of mulches will help to overcome such problems. In the east, mulches are commonly used to retain soil moisture; but in the west, if they are applied .to early, they may have a detrimental affect on the soil temmulches tend to produce lower soil temperatures while plastic mulches raise the temperature of the soil in the root zone of the plants. On the average, an inch of organic matter such as bark, straw, grass clippings, etc. will decrease the soil tem- peratures in the root zone by eight to ten degrees. The use of a clear plastic cover will increase the soil temperature about eight degrees. Even the influence of such 12:00 Efficient Service Noon EVERY FRIDAY Quick, temperature surface at the most Modern Livestock Auction in Utah Salina, Utah -- Tel. 529-393- 2 896-556- 7 JOHN T. CRANE Phone SALE DAY Salina Yard Foreman SHEEP & PIGS JACK ROBINS BOB BAGLEY TUESDAYS Phone Salina Phone BOB BERETT Phone Spanish Fork 798-223- 529-771- 4 4 529-755- 529-720- 1 8 Salina Poplin Shirts Quality Lee Chetopa Twill work shirts made of 65 d polyester and 35 cotton. Features pockets, true double yoke and long shirt tails. Nine rugged colors for you to choose from. man-size- Phone Richfield BRUCE NIELSON, Manager Chetopa Twill Long and Short Sleeve Lee4 Producers Salina Auction FOR only 1 2 Noon practices as cultivation of the soil will modify the soil temperatures. For example, barren soil mulched to a depth of four inches and allowed to condition for 30 days at the Salt Lake City Airport reached a surface temperature of 160 degrees on a warm summer day. After this soil had been compressed to remove the results of the cultivation, the soil at the dropped by 20 degrees in only 15 minutes. Under the same sunny conditions, when this same soil was mixed with one third organic material and moistened, the maximum surface temperature near mid day was only 110 to 120 degrees depending upon the amount of moisture added to the soil. Planting of such early crops as peas is now possible. Hence, early soil preparation will produce early production in the garden and allow multiple cropping of the same areas where space is a limiting factor for crop production. |