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Watch Nick Fleitz, Agronomist at Pentair Hypro, share his insight on coverage as it relates to your tank mix application and how to evaluate the coverage you’re getting in your field.
Crop Protection Chemistries Have Two Main Categories
Contact Chemistry
Contact crop protection chemistries only affect the area it encounters and exhibits minimal translocation within the plant. Therefore, they require higher droplet densities and leaf surface coverage for effective pest control.

Spray Coverage Provided By The
Pentair Hypro 3D Nozzle
Systemic Chemistry
Systemic crop protection chemistries are actively absorbed (translocated) within the plant to reach its target site of action. Therefore, they do not require the same levels of droplet density and leaf surface coverage for effective pest control.

Spray Coverage Provided By The
Pentair Hypro ULDM Nozzle
Tank Mix Nozzle Selection
Applying a mixture of crop protection chemistries can pose a challenge to achieving optimum agronomic performance. Not all drift reduction nozzles are created equal. It’s important to evaluate nozzle selection and sprayer settings closely.

A spectrum of drift reduction levels by nozzle type
WHICH IS MOST IMPORTANT FOR YOUR APPLICATION, COVERAGE OR DRIFT REDUCTION?
Identifying nozzles that provide a balanced approach toward drift reduction and coverage should be the focus in tank mix nozzle selection. Additionally, seeking out more versatile nozzles for your operation can save you money by limiting the number of nozzles needed for your sprayer. It may also save time that would otherwise be spent switching between different nozzle types. Utilizing versatile high-technology spray nozzles is an effective way to enhance your agronomic spraying performance throughout the season.
How To Test Your Own Spray Coverage
Spray Coverage Provided By The
Pentair Hypro ULD Nozzle
The UV / Blacklight Method
What you'll need:
- UV Dye (any over-the-counter type will do)
- Handheld Blacklight
Coverage in the field can be challenging to visualize and quantify. An easy way to test your spray coverage is to take some UV dye and spray it into your crops as you normally would. Once it’s dark outside, take a handheld blacklight to look and see where your spray droplets landed. This method illuminates the spray droplets so you can more easily see the droplet density, the degree of coverage achieved and the uniformity of the spray pattern from the top to the bottom of the plant.
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