Spray Tips Don’t Last Forever!
There is sufficient evidence that spray tips may be the most neglected component in today’s farming. Even in countries with obligatory sprayer testing, spray tips are the most significant failure. On the other hand,
they are among the most critical of items in proper application of valuable agricultural chemicals.
For example, a 10 percent over-application of chemical on a twice-sprayed 1,000-acre farm could represent a loss of $2,000–$10,000 based on today’s chemical investments of $10.00–$50.00 per acre. This does not take
into account potential crop damage.
Spray Tip Care is the First Step to Successful Application
The successful performance of a crop chemical is highly dependent on its proper application as recommended by the chemical manufacturer. Proper selection and operation of spray nozzles are very important steps in accurate chemical
application. The volume of spray passing through each nozzle plus the droplet size and spray distribution on the target can influence pest control. Critical in controlling these three factors is the spray nozzle orifice. Careful craftsmanship
goes into the precision manufacturing of each nozzle orifice. European standards, for example the JKI, require very small flow tolerances of new nozzles (+/-5%) of nominal flow. Many TeeJet nozzle types and sizes are already JKI-approved, which confirms the high quality standard designed into TeeJet nozzles. To maintain the quality in practical spraying as long as possible, the operator’s job is the proper maintenance of those spray tips. 
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