New transgenic Rootworm resistant hybrids have given farmers the opportunity to grow continuous corn without the use of insecticides.The above photo illustrates how Pioneer brand 35F44 has little to no rootworm scarring while its non rootworm resistant,Glyphosate tolerant isoline,Pioneer brand 35F37 shows fairly significant rootworm feeding.Both bybrids were grown in a continuous corn rotation.They are being evaluated in several rootworm resistant feeding trials this summer in continuous corn ground across Southwestern Ontario.One must keep in mind that the only value that Rootworm resistant hybrids provide growers is the protection they can give against any possible rootworm feeding.Outside of that Rootworm resistant hybrids behave no differently from any other hybrid.So the key to using New Rootworm resistant hybrids is using them where there can give an economic payback and that is in a continuous corn situation.
Double click on the above photo and you will get a closer look of how the roots of Pioneer brand 35F44 ,in the foreground ,compare to its conventional RR isoline Pioneer brand 35F37 in the background.
This is a shot of one of the roots of Pioneer brand 35F37.As you can see there is quite a bit of root pruning that has taken place here.( Double click on the photo for a better close up - be sure to scan around )This particular root has nearly a full node of roots missing.The degree of yield loss that this could cost a farmer would be highly dependant on the years weather.A relatively stress free year with adequate moisture might only mean a loss of a couple of bushels per acre.However a highly stressful year with limited rainfall could end up costing a grower a loss of 20 bu/acre.
Pioneer PAT intern Blair Freeman is seen here evaluating a root from one of Pioneers' root dig locations.
Soil is being washed from the roots here so plants can be more accurately assessed and scored for any rootworm injury that may have incurred due to rootworm feeding.Rootworm larvae will feed on corn roots from June 10th-15th through to silking.By that time rootworm larvae will have grown full size and pupated into adult rootworm beetles that emerge from the soil and start clipping silks.Southwestern Ontario farmers will experience feeding damage from both the Green Northern and striped Western Rootworm Beetles.
The roots in each pail represent randomly dug plants from different hybrid rootworm treatment comparisons.Randomly dug plants from each hybrid treatment are tagged and placed in separate pails to allow proper evaluation and scoring.Pioneer is conducting numerous on farm rootworm comparison studies this summer with different hybrid traits and technologies.Your Pioneer sales rep can fill you in on the full details.
New transgenic Rootworm resistant hybrids have given farmers the opportunity to grow continuous corn without the use of insecticides.The above photo illustrates how Pioneer brand 35F44 has little to no rootworm scarring while its non rootworm resistant,Glyphosate tolerant isoline,Pioneer brand 35F37 shows fairly significant rootworm feeding.Both bybrids were grown in a continuous corn rotation.They are being evaluated in several rootworm resistant feeding trials this summer in continuous corn ground across Southwestern Ontario.One must keep in mind that the only value that Rootworm resistant hybrids provide growers is the protection they can give against any possible rootworm feeding.Outside of that Rootworm resistant hybrids behave no differently from any other hybrid.So the key to using New Rootworm resistant hybrids is using them where there can give an economic payback and that is in a continuous corn situation.
Double click on the above photo and you will get a closer look of how the roots of Pioneer brand 35F44 ,in the foreground ,compare to its conventional RR isoline Pioneer brand 35F37 in the background.
This is a shot of one of the roots of Pioneer brand 35F37.As you can see there is quite a bit of root pruning that has taken place here.( Double click on the photo for a better close up - be sure to scan around )This particular root has nearly a full node of roots missing.The degree of yield loss that this could cost a farmer would be highly dependant on the years weather.A relatively stress free year with adequate moisture might only mean a loss of a couple of bushels per acre.However a highly stressful year with limited rainfall could end up costing a grower a loss of 20 bu/acre.
Pioneer PAT intern Blair Freeman is seen here evaluating a root from one of Pioneers' root dig locations.
Soil is being washed from the roots here so plants can be more accurately assessed and scored for any rootworm injury that may have incurred due to rootworm feeding.Rootworm larvae will feed on corn roots from June 10th-15th through to silking.By that time rootworm larvae will have grown full size and pupated into adult rootworm beetles that emerge from the soil and start clipping silks.Southwestern Ontario farmers will experience feeding damage from both the Green Northern and striped Western Rootworm Beetles.
The roots in each pail represent randomly dug plants from different hybrid rootworm treatment comparisons.Randomly dug plants from each hybrid treatment are tagged and placed in separate pails to allow proper evaluation and scoring.Pioneer is conducting numerous on farm rootworm comparison studies this summer with different hybrid traits and technologies.Your Pioneer sales rep can fill you in on the full details.
No comments:
Post a Comment