Dr. Alan Dexter - Sugarbeet Weed Control Specialist
Main problem with tank-mixing pesticides or pesticides and liquid fertilizer is the failure of components to remain uniformly dispersed.
Check compatibility in quart jars before filling a spray tank.
Comparing jar "B" with jar "A" will
determine the value of adding a compatibility agent. If materials
remain suspended or if they are easily resuspended, mixing is
possible with good agitation. If they separate, precipitate, or
form "gunk", check jar "A" to see if adding a
compatibility agent solved the problem. If so, repeat thetest
using varying amounts of compatibility agent to determine the
optimum amount needed.
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1 pint = 473 milliliters
1 pound = 454 grams
1 pound/25 gallons = 2.2 grams/pint
1 quart/25 gallons = 4.7 milliliters/pint
If gram scales and milliliter measures are not available, then approximations can be made with measuring spoons.
1 teaspoon = 5 milliliters
1 level teaspoon = 2 to 3 grams
1 quart of emulsifiable concentrate or 1 pound of wettable powder per 25 gallons of water would be appoximately 1 level teaspoon per pint.
Are spray tank mixes legal?
Agricultural pesticides must be registered and the safety and residues of the pesticides must be established by the Federal Environmental Protection Agency (EPA). In the past, obtaining clearance for the use of mixtures of previously registered pesticides was not difficult. Now a set of data on all facets of the spray tank mixture is required as though the mixture was a completely new pesticide.
Supposedly, if the label does not state how the pesticide can be applied in combination with fertilizer, then such a combination should not be used. However, farmers can still apply on-the-farm mixtures if the company does not register the combination. The user must assume the responsibility that food and feed products are free of illegal residues.
wild oats _____________ wild mustard _____________ Setaria sp.pigeongrass or foxtails _____________ redroot pigweed _____________ wild buckwheat _____________ common lambsquarters _____________ smartweed |
ppi _____________ pre _____________ post _____________ ppi _____________ pre _____________ post _____________ ppi _____________ pre _____________ post _____________ ppi _____________ pre _____________ post _____________ ppi _____________ pre _____________ post ___________ ppi _____________ pre _____________ post _____________ ppi _____________ pre _____________ post |
Avadex (diallate) - good to fair Eptam (EPTC) - fair to good Ro-Neet (cycloate) - fair to good________________ TCA - poor to fair Pyramin (pyrazon) - poor______________________ Carbyne (barban) - good to fair Dowpon (dalapon) - fair to poor Betanal (phenmedipham) - poor to fair H-273 (endothall) - poor Pyramin (pyrazon) - poor______________________ Eptam (EPTC) - poor Ro-Neet (cycloate) - poor Avadex (diallate) - poor_______________________ TCA - poor Pyramin (pyrazon) - good to poor________________ Betanal (phenmedipham) - good Pyramin (pyrazon) - good to fair H-273 (endothall) - poor to fair Dowpon (dalapon) - poor Carbyne (barban) - poor______________________ Eptam (EPTC) - good Ro-Neet (cycloate) - good Avadex (diallate) - poor to fair__________________ TCA - good Pyramin (pyrazon) - poor______________________ Dowpon (dalapon) - good Betanal (phenmedipham) - fair to good H-273 (endothall) - poor Carbyne (barban) - poor Pyramin (pyrazon) - poor______________________ Eptam (EPTC) - good to fair Ro-Neet (cycloate) - good to fair Avadex (diallate) - poor_______________________ Pyramin (pyrazon) - poor to good TCA - poor________________________________ Pyramin (pyrazon) - good to fair H-273 (endothall) - poor to fair Betanal (phenmedipham) - poor Dowpon (dalapon) - poor Carbyne (barban) - poor_______________________ Eptam (EPTC) - poor Ro-Neet (cycloate) - poor Avadex (diallate) - poor_______________________ Pyramin (pyrazon) - good to poor TCA - poor________________________________ H-273 (endothall) - good Betanal (phenmedipham) - good Pyramin (pyrazon) - good to fair Carbyne (barban) - poor to fair Dowpon (dalapon) - poor_____________________ Eptam (EPTC) - good to fair Ro-Neet (cycloate) - good to fair Avadex (diallate) - poor_______________________ Pyramin (pyrazon) - good to poor TCA - poor________________________________ Betanal (phenmedipham) - good Pyramin (pyrazon) - good to fair H-273 (endothall) - poor to fair Dowpon (dalapon) - poor Carbyne (barban) - poor______________________ Eptam (EPTC) - poor Ro-Neet (cycloate) - poor Avadex (diallate) - poor_______________________ Pyramin (pyrazon) - good to poor TCA - poor________________________________ H-273 (endothall) - good Pyramin (pyrazon) - good to fair Betanal (phenmedipham) - fair Carbyne (barban) - poor Dowpon (dalapon) - poor |
Injury least likely | | | | | | | | | | | | | | | | | injury more likely |
treatment____________________________________________ Carbyne (barban) post Avadex (diallate) ppi Ro-Neet (cycloate) ppi TCA pre Pyramin (pyrazon) pre or post Ro-Neet + Avadex (ppi) H-273 (endothall) post Dowpon (dalapon) post Eptam (EPTC) ppi Pyramin Plus (pyrazon + dalapon) post Betanal (phenmedipham) post Eptam + Avadex ppi Eptam + TCA ppi Ro-Neet (ppi) followed by Betanal or Pyramin Plus (post) Ro-Neet + Avadex (ppi) followed by Betanal or Pyramin Plus (post) Eptam (ppi) or TCA (pre) followed by Betanal or Pyramin Plus(post) Eptam + Avadex (ppi) or TCA + Avadex (ppi) followed by Betanal or Pyramin Plus (post) Eptam + TCA (ppi) followed by Betanal or Pyramin Plus (post) |
Herbicides applied to hand weeded
sugarbeets, Fargo, 1970
Herbicides applied to hand weeded
sugarbeets, Fargo, 1971
1971 Sugarbeet Research and Extension Reports. Volume 2, pages 62 - 66.