Parallel® PCS

Since liquid fertilizers can vary, even within the same analysis, always check compatibility with herbicide(s) each time before use . Be especially careful when using completesuspension or fluid fertilizers, as serious compatibility problems are more likely to occur . Commercial application equipment may improve compatibility in some instances . The following test assumes a spray volume of 25 gals ./A . For other spray volumes, make appropriate changes in the ingredients . Check compatibility using this procedure:1 . Add 1 pt . of fertilizer to each of 2 one-qt . jars with tight lids .2 . To one of the jars, add 1/4 tsp . or 1 .2 milliliters of a compatibility agent approved for this use such as Compex® or Unite® (1/4 tsp . is equivalent to 2 pts ./100 gals . spray) . Shake or stir gently to mix .3 . To both jars, add the appropriate amount of herbicide(s) . If more than one herbicide is used, add them separately with dry herbicides first, flowables next, and emulsifiable concentrates last . After each addition, shake or stir gently to thoroughly mix . The appropriate amount of herbicides for this test follows:Dry herbicides: For each pound to be applied per acre, add 1 .5 level teaspoons to each jar .Liquid herbicides: For each pint to be applied per acre, add 0 .5 teaspoon or 2 .5 milliliters to each jar .Note: For Parallel PCS tank mixtures with AAtrex + Princep, use 1/3-1/2 the amount of AAtrex specified above and the remainder as Princep, depending on whether the 1:2 or 1:1 ratio of AAtrex to Princep is to be applied .4 . After adding all ingredients, put lids on and tighten, and invert each jar 10 times to mix . Let the mixtures stand 15 minutes and then look for separation, large flakes, precipitates, gels, heavy oily film on the jar, or other signs of incompatibility . Determine if the compatibility agent is needed in the spray mixture by comparing the 2 jars . If either mixture separates but can be remixed readily, the mixture can be sprayed as long as good agitation is used . If the mixtures are incompatible, test the following methods of improving compatibility: (A) slurry the dry herbicide(s) in water before addition, or (B) add 1/2 of the compatibility agent to the fertilizer and the other 1/2 to the emulsifiable concentrate or flowable herbicide before addition to the mixture . If incompatibility is still observed, do not use the mixture .*See Special Mixing Instructions for tank mixtures with Cotoran, and with AAtrex or Princep + Prowl under the appropriate tank mixture section