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The Syngenta Field Report features information and experts from Syngenta sharing observations about issues growers are dealing with in the fields.

Break down seed treatment combinations: Insecticides

Nov 13, 2009
David Long
 
Because of the benefits of soybean seed treatments, growers have more choices available to protect their crops. Many of these options combine several active ingredients into one package. The best way to figure out the option that makes the most sense for your crop is to compare individual active ingredients in a combination. 

For example, thiamethoxam and imidacloprid are two common insecticide active ingredients used in seed treatment combinations. Thiamethoxam requires less soil moisture for activation, so it ensures plant protection even in dry soil conditions. 

The longer thiamethoxam remains in the soil, the more tightly it binds to the soil, making it less likely to leach. This indicates that thiamethoxam is readily available to be absorbed by plant roots, but shortly after application it binds to the soil profile thereby reducing leaching potential. However, it does not bind so tightly that it is not available for plant uptake. 
 
In bioassays conducted for determination of soil absorption, imidacloprid showed stronger binding on each of the analyzed soil types than thiamethoxam. High levels of soil absorption or binding can render the pesticide unavailable for plant uptake and biological activity.
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COMMENTS (2 Comments)

David Long
It is important to note that all pesticides are subjected to bee toxicity studies before they can be registered by the U.S. Environmental Protection Agency. The honey bee acute contact toxicity test is routinely conducted and in certain instances, additional field tests may be conducted to better understand potential hazards. With that said, the most important thing to remember is that all insecticides, including thiamethoxam, should be used strictly according to the label instructions. The label clearly states that thiamethoxam is highly toxic to bees and therefore provides specific guidelines for growers and applicators. Following these label guidelines is the best way to protect bees from insecticide risks.
10:32 AM Feb 3rd
 
Klaus Maresch
And in May 2008 in Germany one of these "wonderful" neonicotinoids was responsible for the one of the biggest losses of beehives of the last 60 years. More than 11.500 hives died because of this poison.
5:16 AM Nov 15th
 

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