Page 26 



Spray Guns and Their Operation 



Continued from page 4. 

 perfect control of the liquid, you had 

 better get one that will or go back to 

 rods and nozzles. 



If you could follow a minute particle 

 of spray from the gun nozzle you would 

 find that it would go forward in a 

 spiral direction. When it reaches the 

 point where the air resistance is equal 

 to the pressure behind it there will be 

 a sort of roll and it will float in the 

 air. Every cubic inch of air space will 

 be full of this finely atomized liquid 

 which will thoroughly cover either the 

 fruit or the limbs. This can be accom- 

 plished only by a high pressure depend- 

 ing on the distance sprayed as I stated 

 before. 



At one time I was showing the gun to 

 a crowd of fruit growers when this 

 point came up. I sprayed a telephone 

 pole until it was dripping, standing 

 about fifteen feet from it. On examin- 

 ing it we found that it only lacked a 

 few inches of covering entirely around 

 the post. The second post was sprayed 

 from the same distance, using about the 

 same amount of water. On examining 

 it we found that only the half next to 

 us was wet. The first had been sprayed 

 with the gun only open enough for 

 the spray to well reach the post where 

 it floated in the air like a cloud of 

 smoke. On the second post the gun 

 was wide open and the spray which did 

 not strike the post was going from ten 

 to twelve feet beyond it. What struck 

 the post on the sides was deflected off 



BETTER FRUIT 



with the driving pressure behind it. It 

 did not roll or cover any of the sur- 

 face not directly in line with the nozzle. 

 Had this been a fruit tree the results 

 would have been unsatisfactory. 



In regard to using the gun on calyx 

 spray. There is the same difference of 

 opinion as I mentioned before, even 

 among our leading horticulturists. I 

 have always contended that the right 

 gun properly operated would do just as 

 effective work as any rod and nozzle 

 and can be accomplished with less la- 

 bor and liquid. However, as I said 

 before, you must have the pressure to 

 give you a very finely atomized spray. 

 There are different densities of water, 

 from ice to the finest fog. If you would 

 dip a calyx into a bucket of water yon 

 would get it all wet, a 100 per cent 

 perfect spray. You, of course, cannot 

 do that in an orchard, but you can 

 take a high pressure and atomize the 

 water. In other words thin it down 

 and entirely envelope the blossoms in a 

 cloud of thin water long enough for the 

 inside of every calyx to be thoroughly 

 coated with spray regardless of the 

 angle at which they stand. This finely 

 atomized spray will enter calyx that are 

 closed too much for a coarser spray to 

 enter and will therefore give you bet- 

 ter results than a driving spray which 

 is nearly always a coarse spray. . 



Care should be used in handling the 

 gun to see that you are not over shoot- 

 ing by having the gun too wide open 

 and driving the spray beyond the blos- 



February, 1921 



soms instead of filling the area around 

 them with a cloud of spray. You can- 

 not cover the far side of an apple or 

 the inside of a calyx with a solid 

 stream of coarse spray shot from the 

 ground. 



Some operators have made a mistake 

 by long distance spraying and too little 

 walking. You will not get the results 

 at thirty feet that you will at fifteen, 

 regardless of the pressure you are using. 

 Bear this in mind and wherever pos- 

 sible get within fifteen feet of the point 

 you want to spray. 



Much depends upon the operator re- 

 garding material saved and effective- 

 ness. I have known of some instances 

 where there was 40 per cent saving on 

 material, the man doing 70 per cent as 

 much as two men with rods and noz- 

 zles. Other instances where one man 

 did more than two men, but kept no 

 record of material. My observations 

 prove to me that one man with a gun 

 will do SO per cent as much as two men 

 with rods and nozzles with a saving of 

 about 12 per cent in liquid. These 

 same men tell me they are getting a 

 lower percentage of wormy apples than 

 ever before, using the gun for all sprays 

 and getting as low as one-half of 1 per 

 cent wormy apples. 



In these days of close competition 

 and small profits it behooves the fruit 

 grower to produce the maximum qual- 

 ity with a minimum spraying cost and 

 the right spray gun will be a big aid 

 in solving the problem. 



WHY EXPERIMENT 



WHEN YOU CAN 



SPRAY with DORMOIL 



The Miscible Oil for Dormant Use 



FOR THE CONTROL OF 



Leaf Roller, Scale 



ApHis, Red Spicier 



Blister Mite, Pear Psylla 



Mosses and Lichens 



"DORMOIL unquestionably gave me 

 satisfactory results on the Leaf Roller." 

 W. FIKE, Hood River, Ore. 



' ' I have used your D O R M O I L f or the past 



two years and have had splendid results." 



M. M. HILL, Hood River, Ore. 



DORMOIL is Uniform in Quality. Years of use have demonstrated 

 it to be the best and most efficient MISCIBLE OIL 



MANUFACTURED BY 



HOOD RIVER SPRAY COMPANY 



HOOD RIVER., OREGON 



State Distributors of the "FRIEND" Sprayers 



FN WRITING 



