Notes on the Protocol for adding a new pesticide.

1. Reason for adding a new pesticide?   Economics ___   Original Pesticide Not Working ___  Better Environmentally ____  Food Safety Improvement ____

2. Was  field man aware that the grower utilizes tank mixes? Yes___ No___

3. Was the field man aware that the label did not suggest that it be used in a  tank mix per the label for red raspberry? Yes ___ No___

4. Was the field man and or grower  knowledgeable that when adding a new chemical to a tank mix that a jar test should be performed.

5. How was it that the field man believed that Callisto was suitable for red raspberry? Per the Label ___ Word of mouth ___  Seminar ___ Other ________

6. It is considered a standard practice when adding a new chemical for treating a crop that it be tested on a  small section.
Did the field man advise the grower to do as much?
Was the grower educated to perform a small plot test when adding new chemicals  when going through the pesticide applicators certification process?

7. After the damage was noted were tests conducted to determine that the damage was in fact due to Callisto?  Yes ___ No ___

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Opinions and other observations :
The manufacturer, due to the amount of economic damage incurred,  should have conducted proper tests and documented the application
 to verify that their  product was not the cause of damage.

There are numerous articles online reporting damage to various caneberries exposed to mesotrione.

Some extension offices in some states  offer services to help determine if a pesticide is the cause of damage to a crop.
Test that may be used to determine the actual cause of damage include soil, water and of the plant itself.

Regarding soil, it can be important as to how deep the chemical penetrated the soil. This depth should be known by the manufacturer and shared to all concerned.
There can also be residual chemicals from  years earlier that can affect how a new chemical added to the pesticide management protocol  will behave.

Regarding water, there can be other chemicals in the water that may change the performance of chemical applied.

Regarding the plant,  there can be variances in the performance of the chemical depending on variety. Note: There are a couple of varieties of Meeker.