Raspberry Case Questions and Notes.

A proper quality assurance program which is mandated in the pesticide industry should have inputs for
variances that cause damage to crops. The USA seemingly allows companies to self regulate to an extent.

In 2012 Callisto was introduced as a substitute for Simazine in the tank mix for the early April pesticide application.
(See Screen Shots of pesticide records below.)
What was the main reason???
Possible answers might be...

Per standard proceedures as spelled out in various training manuals and shown in training videos it is proper to at least "jar test" a new tank mix.
It is also proper to test the mixture on a test plot.
Was the field man aware of any such tests for the combinations that were likely to be applied.
Results do vary by cultivar inside of plant groups.
Was the field man aware of actual field tests done on the specific version of Meeker being grown on the local fields? ... (There are two versions of Meeker.)

Also noted is that Fertilizer was combined in the 2012 April 5 Application. Was this the case on all fields"
Of Note: There is a fertilizer available that has mesotrione infused in it. Whether fertilizer in combination with Mesotrione is considered safe for Rasberry is a question that needs to be sorted out.

What was the difference between the tank mixes on the various fields and was were their substantial differences in percent of crop damage?

Due diligence would have been to see if their was any correlation between various tank mixes and degree of crop damage.



The difference in Mode of Action MOA  Simazine vs Mesotrione
Simazine is mainly via the roots vs Mesotrione  which infiltrates leaves, roots and shoots.
Simazine is  banned in the EU. It is a Triazine
MOA
Absorbed mostly through the roots. Translocated upward to leaves and growing points. Inhibits photosynthesis. Weed seedlings may emerge from the soil,
then turn yellow and die. Symptoms of injury on nursery stock include interveinal chlorosis resembling iron chlorosis,
marginal chlorosis and necrosis, reduced vigor, and general chlorosis of the new growth. See Photosystem II herbicide injury fact sheet.
 Callisto  / Mesotrione
MOA
The pesticidal mode of action for mesotrione is inhibition of the HPPD enzyme in the carotenoid biosynthesis pathways in plants.
Mesotrione works by disrupting photosynthesis in weeds by infiltrating their leaves, roots and shoots.

Mesotrione inhibits the enzyme 4-hydroxyphenylpyruvate dioxygenase (HPPD).[3] It is an extremely potent inhibitor of HPPD in laboratory tests using the plant Arabidopsis thaliana, with a Ki value of about 10 pM.[6] In plants, HPPD is necessary for the biosynthesis of tocopherols and of plastoquinone, which is essential to carotenoid production. Inhibiton of the pathway ultimately leads to bleaching of leaves as chlorophyll is degraded, followed by plant death.[13][6]


Claims...
Mesotrione is made available to end-users only in formulated products. These use non-powdery material with reduced or no use of hazardous solvents, for example suspension concentrates. The herbicide is compatible with other compounds that may be mixed by the farmer to extend control to the grass weeds which mesotrione itself does not kill.











  • Contact the manufacturer: The first step should be to reach out to the manufacturer of the pesticide. They may be able to offer some initial troubleshooting or explanations for what might have happened. In some cases, manufacturers may offer compensation to farmers for crop damage caused by their products.
  • Report the incident: Report the incident to your local regulatory agency. This will help them track any potential problems with the pesticide and may be helpful if you decide to pursue further action.
  • Review your records: Carefully review your application records to ensure you followed the instructions exactly. Double-check the mixing ratio, application rate, and any specific instructions for your crop and weather conditions.
  • Seek professional advice: Consider getting advice from a local agricultural extension agent or crop advisor. They may be able to help you determine the cause of the damage and advise you on your options.

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