Pre-emergent Herbicides Inhibiting Asiatic Jasmine Growth

We have heard some word about Asiatic or dwarf jasmine (Trachelospermum asiaticum) possibly being affected by different herbicides.  One savvy grower decided to check on things and did a demonstration plot to see what was going on.  The grower applied two applications of either Biathlon, FreeHand, Tower or Gemini and had a non-herbicide control plot.  Liners were potted at 1/10/17 and herbicide was applied.  The second application was on 3/30/17.  Each bed was treated independently. There were plenty of replications within the block, but there were no randomizations or replications of blocks (which might lead to potential errors due to the nursery layout, (i.e. light, irrigation, etc.).  However, I feel that the demonstration is useful to caution a grower about using certain herbicides in all cases.  The picture below shows a representative example from each bed.  Notice the overall size and length of the shoots.  The bottom half of the picture shows the view at the plot level.  Notice the amount of soil showing at the top of the pot.  The grower mentioned that the affected plants are stunted (almost like a growth regulator) and are weeks behind in production time.

UF/IFAS Extension is not making any recommendations with this data; just showing the results of the small-scale demonstration. The use of trade names or registered products in this publication is solely for the purpose of providing specific information.  UF/IFAS does not guarantee or warranty the products named, and references to them in this publication do not signify our approval to the exclusion of other products of suitable composition.  All chemicals should be used in accordance with directions on the manufacturer's label.  Use pesticides safely.  Read and follow direction on the manufacturer's label.

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