Turf and Ornamental Pest Control Robert E. Wolf BAE Dept. Kansas State University.

Turf and Ornamental Pest ControlTurf and Ornamental Pest Control

Robert E. WolfBAE Dept.Kansas State University

Application Equipment:Two basic types of application systems:

• Liquid (sprayers)• Granular

Types of application devices:

Centrifugal, rotary, or broadcast Drop Pendulum Pneumatic

Calibrating granular spreaders:

Reduces complaints about weed, insect, and disease control.

Lowers incidences of using wrong amounts. Minimizes potential problems to the

environment.

Factors influencing granular rates: Size of metering orifice. Speed of the agitator or rotor. Travel speed Roughness of the application area. Topography of the application area. Flowability of the granules. Quality of the granules/mix. Temperature and humidity.

Wind

Checking distribution pattern:

Open area – bounce and scatter. Preferred method – use collection

containers on a line perpendicular to the direction of travel.

Enough boxes to cover 1½ times the anticipated swath width.

Make several passes over the boxes – in the same direction.

Empty contents from containers into a tube or bottle.

Pattern distributions:

Primary collection

Determining the swath width using the tube method:

Compare the tubes.

Determine the tube that is ½ the amount of the center tube.

These two tubes determine the boundaries 5

10 feet

5

5 ft. 5 ft.

Effective swath width:

Final pattern:

Pattern distributions:

Swath To Wide

Side Wind

Header strips and swath overlap:

Recommended application method:• First pass at ½ rate using calibrated

swath width

• Second path on centerline of previous pass

Types of Application - LiquidTypes of Application - Liquid Foliage sprays (shrubs, trees) Area coverage (soils or lawns) Spot sprays LAWN

• Fertilization

• Weed control

• Insect/Fungi control HORT

• Fertilization

• Insect/Disease control

• Dormant oil treatments

Application EquipmentManual Sprayers

• Compressed air

• Knapsack

Spray Management Valve

CF Valve

Easy Spray Valve

SHURflo SRS-540 4 gallon tank 12 volt, 7.0 Amp/hour sealed battery 120 gallons per charge 12 volt SHURflo pump @ 1.0 GPM @ 40 psi Microprocessor pump control Variable speed Adjustable nozzle

Powered Boom Sprayers

Professional Lawn Care

Sprayer Components:

Tanks (contamination issues) Pump, Strainers, Agitation Pressure gauge Hoses, Flow control assemblies Electronics: monitors-computers-

controllers (GPS/GIS) Distribution system Nozzles!!!!!!!!!

Types of Pumps: Roller Pump Centrifugal Pump Diaphragm Pump Piston Pump Peristaltic Pump (Squeeze or

hose pump – chemical injection)

Inside the pumps:

Positive displacement

Non-Positive displacement

Centrifugal Pump Seal Problems:

Run dry seal failure: Pressure spike seal failure: Abrasive seal failure:

Misapplication:

Without proper attention to the equipment, you may end up with a ……

Misapplication

Hand Sprayer Calibration

Spraying to the point of runoffproduct added to each gal. or 100 gal.uniform coverage-dripping from leaves time and gallons per tree/1000 sq. ft.

“Dilute”

Technique important!!

A spray gun has a swath of 10 ft. For uniform distribution of spray use 100% overlap. This creates an effective width of 5 ft.

Calibration For Hand Spray Guns

Step 1:

Mark off a calibration course of 1000 sq. ft.

Accurately measure the time required to spray the calibration course using a proper technique. Remember only record the amount of time the gun is actually spraying.

Step 2:

Step 3:Measure the flow rate from the gun. Using the time recorded in Step 2 collect the output from the gun in a graduatedcontainer for the period of time in Step 2.

Hand Spray Guns, cont.

Example:

It took 50 seconds for an applicator to spray the 1000 sq. ft. calibration course. The amount of spray collected from the gun in the 50 seconds was 1.4 gallons.

Hand Spray Guns: cont.

The application rate for this example is:

1.4 gallons per 1000 sq. ft.or

61 gallons per acre (43.56 x 1.4)

2024283236404448

40 100 200 300 400 500 600 700

Liquid Pressure (psi)

Max

Ver

tica

l R

each

( f

t)

Gun #2 - 20 Gun #2 - 60 Gun #2 - 120

13

6.4

16

57.1 8.8

.9

1.8 2.2

# along curves aredischarge rates in GPM

Vertical Reach at Various Pressures (Spray Gun)

Sericea Lespedeza – Star Thistle Control

Nozzle Technology? Nozzles designed to reduce drift Improved drop size control Emphasis on ‘Spray Quality’

NOZZLE TYPES:

FLAT SPRAY

• Extended Range Flat-Fan

• Turbo Flat-Fan

• Drift Reduction Flat-Fan

• Turbo Flood

• Off center Flat-Fan

Spray Characteristics are Important

Demonstrates Turbo Flat vs TurboDrop-5 MPH Wind

Is this tip good or bad?

Off-Center Venturi Flat-fan

Boom Buster

XP BoomJet

Boom Extender:

For more information contact:

rewolf@ksu.eduwww.bae.ksu.edu/faculty/wolf