Posted by IaGary on June 02, 2011 at 19:43:22 from (69.63.5.162):
Last year I sprayed Sonic and Roundup pre emerge on beans. Bicep and Roundup pre emerge on corn. Then post sprayed Atrazine and Roundup on corn and just roundup on 400 acres of beans to end the year.
When I put away the sprayer for the year I triple rinsed the sprayer with water then put a little RV anti freeze in the pump and hoses to store it for the winter.
This spring I rinsed out the RV antifreeze with water. Loaded Bicep and Roundup, and sprayed my first field of corn before it emerged.
When I started I blew the water out in the corner of the field and took off across the field.
3 weeks later I got a strip of dead corn the width of the boom about 100 yards into the field for about 100 feet long. The corn came up and grew to 3" tall then died.
What chemical could possibly caused this to happen? I have been rinsing and starting like this for 30 years.
The strange part is I sprayed about 200 acres that first day and all the other acres look great.The sprayer set for about 2 days and when I went to spraying again the first field of the day has the exact same thing. 100 yards of good corn no weeds the 100 feet of dead corn. The next 150 acres look fine.
None of those herbicides used the year before will kill corn if sprayed before it emerges like I did. The last thing sprayed last year was Roundup, that will not kill non emerged crops or weeds. I did plant RR corn also.
I have beans with volunteer corn that the Sonic did not kill this year so I don't think Sonic will kill pre emerged corn.
I, my agronomist, nor anyone else I asked can figure it out. What am I missing?
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