Following these simple steps can help you avoid costly input mistakes. INSECTICIDES, fungicides, plant growth regulators, foliar fertilizers, and adjuvants — all can have a place in spray applications to orchards and vineyards. But do they all have aplace in the same spray tank? Getting sludge from an incompatible mix out of a spray tank and hoses can be a dangerous, time-consuming, and expensive process. Worse than that is a complex tank mix that sprays out, but doesn't do the job because of physical or chemical interactions in the tank that have changed the pesticide product in such a way that performance is compromised. Will a convenient tank mix save you the time and cost of a second application? Or will it be a clumpy disaster in the tank? Doa simple jar test to find out before you spray. Most labels call for a jar test if there are compatibility questions with the mix, but many give limited instructions. If a detailed jar test is described on the label, follow those instructions. However,if the label says something vague like "add the proportionate amounts to a quart of water," follow the guidelines presented here.
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