Adjuvants – A Primer

Spreader/Surfactant penetrating wax paper to get to water-sensitive paper.

We can always count on receiving regular questions about tank mixes but in recent years we’re hearing more about adjuvants. Many pesticides are already formulated with a variety of adjuvants. Perhaps they are intended to improve shelf-stability, or mixing and/or product performance. A pesticide label may specify a particular name brand or generalize a category […]

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Spraying Ginseng with Arag Microjets

Classic Arag microjet nozzles.

In June 2013 we ran a ginseng spraying workshop and we learned as much as the growers did. Ginseng is notoriously difficult to spray: It is highly susceptible to pathogens given the high humidity and still conditions generally found under the shade structure. It forms a solid ceiling of leaves that resist spray penetrating to […]

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How much horsepower do I need?

How much horsepower (HP) do you need (really) when pairing a tractor and a towed sprayer or any other PTO powered implement? This important question should be asked BEFORE purchasing any towed implement. Surprisingly, there’s not much guidance out there, so you might hear answers like: Whatever my tractor has must be enough… whatever that […]

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Drift is… good?

OK, fine. We confess to the shameful use of click-bait in our title. Nevertheless, it’s absolutely true: Drift can be good. The reason this statement is unsettling is because of the lack of context, which is really what this article is about. The majority of sprayer-related information available to ag stakeholders relates to horizontal boom […]

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Comparing three brands of water sensitive paper

Introduction Spray coverage describes the degree of contact between spray droplets and the target surface area. This metric can be used to predict the success of an application. One of the easiest methods for visualizing coverage is to use water sensitive paper (WSP), which is a passive, artificial collector that turns from yellow to blue […]

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