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Show I Emergency Control Methods j For Weevil In Alfalfaj I rate of 2',i pounds per acre in dust- ; lng, preferably mixed with an equal ' quantity of du.sting sulphur. Where dusting or spraying is not j possible, alfalfa which is standing still or even going back because of excessive weevil damage, should be cut and removed from the field as quickly as possible. The ground should then be thoroughly stirred with a springtooth, to be followed by -a wire drag made by putting net wire or barb wire under the backward back-ward tilted teeth of a harrow. Leave the soil in this dusty mulched condition con-dition for two days and then irrigate. irri-gate. Due to the increased labor expense, ex-pense, the loss of hay, and the difficulty diffi-culty of .securing irrigation -water at the propeT time, the dragging method meth-od of weevil control is only reccom-mended reccom-mended as a last resort. As a precaution in areas where weevil damage is probable this year, every farmer should find out where he can get a machine on short notice for dusting or spraying. He should know where he can secure the calcium cal-cium arsenate. The county agent will give assistance in this regard. Dusting, spraying and dragging are emergency control measures. They are necessary some years when cultural cult-ural control practices have not been followed or unusual weather is encountered. en-countered. The better .method of insuring in-suring protection against weevil damage is to practice cultural methods meth-ods of arly cutting of alfalfa as out-I out-I lined in a previous article. o- . By W. W. Owens, U. S. A. C. Extension Service. i Dusting or (.praying with calcium arsenate Is the best emergency method meth-od of control when weevils have become so numerous that they are checking the growth of the alfalfa. Arsenic poison slicks on the growing plant in large enough quantities to kill the worms when they start to eat the leaves and buds. Orchard spray machines may be used to spray the alfalfa. They should be able to maintain a minimum minim-um of 75 pounds pressure. A boom attachment can be made from one-half one-half inch pipe. Nozzles should be selected Wiiich win give a misty spray. Two pound; of calcium arsenate ar-senate should be mcd for each 100 gallons of water and this mixture applied at the rate of 100 gallons per acre. Care should be taken to avoid spraying any part of the Dead several times. One spraying will kill the weevil and does not make the hay harmful to livestock. If a machine is to be purchased e.secially for weevil control, a dust-; lng machine rather than a sprayer should be considered. A power duster dust-er capable of covering eight acres x-r hour can be purchased for about $250. For many Utah farms a hand duster -will suffioc Such a machine capable of dusting one acre per hour can be purchased for about $15. Calcium arsenate so finely powdered powder-ed that no grit can be felt between the fingers, should be applied at the |