There are at least two techniques for using a backpack sprayer when spraying an area or plot. You can hold the nozzle tip steady at a suitable height above the target surface, usually within a range of 14-18 inches.  Or, you may choose to swing the wand back and forth in a pendulum motion as you walk. With either technique, make certain that you achieve uniform coverage of the treatment site. Use the same pressure, speed, and technique for the application as was done in calibration. Watch this 8-minute video on How to Calibrate a Backpack Sprayer. If you are applying pesticide to an area measured in square feet, calibrate the sprayer by staking out a 1,000-square-foot test plot (for example, 20 feet × 50 feet) on a surface similar to the treatment site.Fill the sprayer tank half full with water (no pesticide)Record the number of seconds it takes to spray the test plot evenly while walking at a comfortable, steady pace. (It is a good idea to spray the test plot two or three times and figure the average time.)

Stand still and spray into a container for the average time found in Step 2. Apply herbicide to a lawn 40 feet × 65 feet Area to be treated: 40 ft. × 65 ft. = 2,600 sq. ft. Test-plot time to cover 1,000 sq. ft. = 80 seconds Amount of water collected in 80 seconds: 57 oz. Sprayer output: 57 oz. per 1,000 sq. ft. 1.   To determine the total spray mixture needed, set up the following ratio and cross multiply: X = 148.2 oz. (round off to 148). 2.   To determine the amount of herbicide needed, set up the following ratio and cross multiply: X= 5.2 oz. of herbicide 3.   To treat the target area, a little more than 5 oz. of herbicide should be added to 143 oz. of water (148 – 5). Because there are 128 ounces in 1 gallon, this will mean adding 5 ounces of herbicide to 1.1 gal. of water (143/128 = 1.1 gallons of water). In this situation, you will find out how much water is needed to treat an average plant. If the label says “spray to wet”, spray as if you were painting the plant with spray paint.

Try to avoid over-application and minimize dripping of the pesticide off the plant. Add water (no pesticide) to the tank and pressurize it. Then record the number of seconds it takes to spray a representative plant thoroughly. Now spray water into a container for that length of time. Use this number to calculate the amount of water and product needed. Apply insecticide to 18 azaleas in a plant bed. Labeled rate = 3 ounces of insecticide per gallon of water. Number of plants to treat = 18 Seconds to spray one average plant = 12. Amount of water collected in 12 seconds = 10 oz. 1.   To determine the total spray mixture needed, multiply the total number of plants to treat by the amount of water collected to treat one plant. 18 × 10 oz. = 180 oz. 2.   To determine the amount of insecticide needed, multiply the labeled rate by the total spray mixture. 3.   Add a little more than 4 oz. of insecticide to 176 oz. of water (180 – 4) to treat 18 azaleas.

Use the method described in the Ounces-to-Gallons unit of this Web site. Use row width to determine the distance to travel, and record the time it takes to spray (water only) both sides of the row if sprayed in two passes. backpack tightenersIn a container marked in ounces, collect the output from the nozzle for the time it took to cover the 1/128th of an acre calibration course. ninjago backpack targetThe number of ounces collected equals the application rate in gallons per acre.peppa pig backpack abc shop Compiled by Wayne Buhler, PhD.biya backpackHudson Back-Pack Power Sprayer — 6 1/2-Gallon Capacity, Model# 18537backpack zuid oost azie

Hudson Bak-Pak® sprayer is powered by gas engine for agricultural and pest control applications.backpack samsonite df Portable, high-efficiency backpack sprayerheckler backpack amazon 6 1/2-gallon poly tank Quick adjustable padded shoulder straps Padded backrest for operator comfort 12 months parts / 12 months labor Hudson Bak-Pak Sprayer 18537 $448.00 Hudson Bak-Pak Duster — 3 3/4-Gallon Capacity, Model# 18539 This Hudson Bak-Pak® duster is powered by a gas engine to disperse granular fertilizers and pest control products. Portable, flexible, high-efficiency backpack duster Hudson Bak-Pak Duster 18539 $385.00 For professional advice on sprayers or pest control equipment call 360 736 5634 or click here to email SprayingAt Spraying Equipment and Supply we are dedicated to providing

you with the best quality and innovative agricultural sprayers and pest control equipment and in the least expensive manner possible. SES25CB cross bed Sprayers, 25 Gallon,complete with GES Gun, Brass Quick coupler, Air Gap Filler and lid lock. Hose reel with 300ft urethane blend spray hose, approx weight 130 lbs. Regular Price $1895.00, plus shipping Click photo for full size. Telephone: 360 736 5634 Or click below to email SHOPPING CART: Minimum order is $35.00, excluding shipping We accept VISA MASTERCARD AMEX OR DISCOVERY credit cards.Hudson Neverpump 4 gallon(Battery Powered Backpack) Be the first one to write a review$ BACK IN STOCK & READY TO SHIP!! First, let me say that we have been looking for a sprayer like this for many years. When customers called in the past that did not need or could not afford the Spotshot sprayer, we pointed them to the Black & Decker battery-poweredThis was a nice little unit that sold for around $100, and

although we did not sell this unit, we felt it fit a huge category of customers with small to medium-sized gardens. It didn't have a long battery life but was the best thing out there in the price range. is no longer manufactured and until now we had nothing to offer. For several years we tested various battery-powered sprayers with no success. unacceptable battery life or the pump pressure was so low it did not do the job for spaying rose plants.  We are very excited to offer the Battery Operated Bak-Pak� Sprayer The manufacturer claims the battery life to be course we were skeptical, so we did our own test. We charged the sprayer fully and put one gallon of water in its tank. We turned on the pump and locked the spray handle in the "spray on" position. the wand inside the tank and below the surface of the water. the pump was being forced to spray through the nozzle and into the water. After 4 hours of continuous running, full pressure.

After 8 hours, fullAfter 12 hours, YES, still full pressure. absolutely amazed and know you will be too. We can highly recommend this(Note: The sprayer weighs approximately 20 lbs empty.) Here are the manufacture's comments: Sprays for 10 Hours on a Single Battery Charge! Large poly on/off Valve�comfortable, thumb operated Extra Long 20" Poly Spray Wand Bonus Nozzle System with 3 Different Spray Settings Lead Acid Battery Sprays for 10 Continuous Hours on a Includes AC Charger that completely Charges Battery in 9 Extra Large Fill Opening Prevents Spills when Adding Customers note:  Past versions of this unit came withIn our opinion they served no practical purpose since they were not constructed to "move" the unit when full.  We found the unit harder to fill with the casters and are happy to report this sprayer no longer Last be not least:  If you cannot carry the weight of a backpack sprayer full of water (about 50 lbs) you can strap this unit to a