# help with calibration

Discussion in 'Pesticide & Herbicide Application' started by lawnbridge, Oct 25, 2007.

1. ### lawnbridgeLawnSite Memberfrom Haskell, TexasMessages: 97

I have a 25 gallon sprayer, I marked off 1,000 sf and walked a normal pace spraying water and did it in 1 minute. I then sprayed for 1 minute in a calibration measuring container. It came up with 1/2 gallon. My question... If I am putting down Pendelum and it calls for 1.3 - 1.8 oz per 1,000 sf., If I was to use 1.5oz per 1,000 sf. How much Pendelum should I use?

2. ### ArizPestWeedLawnSite Bronze Memberfrom On the ToiletMessages: 1,457

25 gals times 1.5 oz = 37.5 ounces of Pend

3. ### riderLawnSite Memberfrom ohioMessages: 152

1/2 gal per 1000sq ft , 25 gal tank =50,000 sq ft

1.5 oz pendulum x 50 = 75 oz pendulum

4. ### RigglePLCLawnSite Fanaticfrom Grand Rapids MIMessages: 13,813

I doubt if this would work--solution would be too thick. Probably you have no agitation. Maybe Dimension liquid would work.

5. ### RunnerLawnSite Fanaticfrom Flint, MichiganMessages: 13,497

Wait a minute....Red Flags going up ALL OVER here. First, you are saying that you walked this out...meaning you are pulling hose? Then you are asking about mixing rate formulas, which tells us inexperience (no biggy), HOWEVER. If you are spraying 1/2 gal. per 1000 out of a hose, this is WAY too hot to be spraying from a hose - let alone for someone without experience. This is a sure recipe for disaster. I'll give a hint...1 gal. per 1000 is a hot mix to be spraying - even for an experienced, well seasoned applicator

7. ### RigglePLCLawnSite Fanaticfrom Grand Rapids MIMessages: 13,813

Does this mean you are using an electric sprayer (12 volt)? Do you mean you are applying a half gallon per one thousand sq ft? Gun or boom?

What weeds in Texas at this time of year?

A granular application would work out better--that is my guess. You can cover 2000 sq ft per minute granular.

8. ### bug-guyLawnSite Bronze Memberfrom spring hill/brooksvilleMessages: 1,033

math says 1/2 gal per 1000 of h2o should be 1.5 oz of chem per 1/2 gal of water
3 oz per gal = 2000 sq ft
this does seem to be low volume of water but some elect units are like that
i would prefer a higher volume like 3 gal of water per minute but some times you do what with you have
exercise care.

9. ### (wi) RootsLawnSite Memberfrom 9Messages: 152

Application rate =

(Average output per nozzle) x (Number of nozzles)
______________________________________________

Area covered

Average output: 64oz./128= .5

.5 x 1 nozzle
___________________________ = .0005 gallon per square foot

100 x 10

1000 x .0005 = .5 gallon per 1,000 square feet (or)
43560 x .0005 = 21.78 gallons per acre

10. ### Green DreamsLawnSite Senior Memberfrom TexasMessages: 593

This is the best post on this thread.

And down here in SE Texas Megalawn Co starts putting out simizine in Sept.