Problems with Micronutrients on Glyphosate Resistant Crops


Many corn varieties and soybean varieties which are glyphostate resistent will often show micronutrient problems following the applications of glyphosate. These problems may also show when glyphosate is used as a knock down herbicide immediately before planting.


It appears that glyphosate kills weeds by limiting the amount of auxin transport from the new leaves to the roots. Therefore, the roots of weeds do not have enough auxin for continuous new cell division.

On the other hand, glyphosate resistant plants appear to have the ability to move enough auxin from the leaves to the roots so the glyphosate does not stop cell division in the roots.

It is becoming more apparent from research that during certain periods of climate conditions or soil conditions (wet soil or dry soil) that the glyphostate resistant crops cannot move adequate auxin from the new leaves down to the growing root tips. Therefore, there is an interference for a short period of time in cell division and new root hair formation.  It is during this condition that glyphosate can cause manganese deficiency in soybeans and zinc deficiency in corn. More common, copper deficiency is noted. It has just not been identified so that people can observe this problem.

There has been enough research conducted and enough people have experienced the problems in the field to be fairly that this is a problem that must be addressed.

It is an easy problem, however, to solve. When solving this problem, one will get a greater yield by applying these treatments, than they would have, even if this problem had not occurred. It may be a blessing in disguise.


Apply 1.0 quart per acre of X-Tra Power in the furrow at planting time. This will provide the micronutrients which normally show up in instances where glyphosate may retard cell division.

X-Tra Power will also cause the roots to make and accumulate more auxin. This gives the plant a double defense against any possibility of glyphosate interrupting cell division.

If one is not able to place an infurrow application of X-Tra Power or place an application of X-Tra Power with starter fertilzer, the alternative is to spray 1.0 quart of X-Tra Power on the foliage when the plant has approximately 3-4 leaves.

If X-Tra Power is used as a soil treatment at planting or used as a foliar spray when plants have 3-4 leaves, any problems of cell division at the root tips should be overcome.

The only better treatment than above, is to use 1.0 quart of X-Tra Power in the soil at planting, plus 1.0 quart of X-Tra Power at the V3 to V4 leaf state. The combination will give greater yield increases and even help the plant become more resistant to sucking insects, such as aphids.

J/PEP Program/Problems with Micronutrients on Glyphosate Resistant Crops 080707 bc