Field Trial Results, 1971

    Crookston Casselton Ave. 2 locations
    % % %  
Treatment Rate
lb/A
P.W. control W.O. control S. B. injury S. B. yield
Avadex 2 1 98 0 15.7
Eptam 2.5 94 96 1 18.6
TCA 7 5 0 0 12.9
Ro-Neet 4 92 91 0 19.1
Eptam+ Avadex 2+1 93 99 3 21.5
TCA + Avadex 6+1 12 91 0 16.4
Ro-Neet + Avadex 4+1 94 99 0 18.7
Pyramin + TCA 3.8+6 35 0 0 14.3
Betanal 1 39 18 1 15.4
Pyramin Plus 12P 76 62 7 16.6
Avadex + Betanal 2+1 35 99 2 17.1
Avadex + Pyramin Plus 2+12P 92 99 11 18.4
Eptam+ Betanal 2+1 100 98 29 20.6
Eptam + Pyramin Plus 2+12P 99 99 46 20.2
TCA + Betanal 7+1 35 48 2 15.8
TCA + Pyramin Plus 7+12P 86 55 8 16.0
Ro-Neet + Betanal 4+1 98 96 14 20.3
Ro-neet + Pyramin Plus 4+12P 98 96 23 20.0
Avadex + Eptam + Betanal 1+2+1 99 98 39 18.2
Avadex + Eptam + Pyramin Plus 1+2+12P 98 100 41 19.9
Avadex + TCA + Betanal 1+6+1 26 100 4 16.3
Avadex + TCA + Pyramin Plus 1+6+12P 68 100 13 17.5
Avadex + Ro-Neet + Betanal 1+4+1 95 100 13 20.0
Avadex + Ro-Neet + Pyramin Plus 1+4+12P 99 99 23 20.6
Endothall + Dowpon + Surf WK 2+1+1 pt 28 77 9 16.5
Weedy Check   0 0 0 11.8
Hand Weeded Check   100 100 0 19.6

Weed Seed Germinating from approximately 1/4 cu. ft. of tare soil

Weed Species Number of
Seedlings
germinated
Number of
Seedlings per acre
6 inches of soil
green and yellow foxtail 929 91,051,290
wild mustard 74 7,252,740
wild buckwheat 31 3,038,310
common lambsquarters 3 294,030
kochia 8 784,080
redroot pigweed 13 1,274,130
total 1058 103,694,580

Fall Applications of EPTC for Weed Control in Sugarbeets

Treatment

Rate lb/A

Sugarbeet emergence beets/100 ft row Visual rating Sugarbeet Yield T/A
% retardation sugarbeets % control foxtail
Hand Weeded Check -- 109 0 100 17.0
Weedy Check -- 132 0 0 a/
EPTC - fall 3 117 10 92 20.3
EPTC - spring 3 126 14 89 17.1
EPTC - fall 6 101 36 100 18.1
EPTC - spring 6 98 44 99 18.1
EPTC - fall 9 114 30 100 a/
EPTC + diallate - fall 3+2 120 19 98 19.2
EPTC + diallate - spring 3+2 102 18 95 18.2
a/ Treatment not harvested

Examples of Calculating Amount of Product per Acre from Active Ingredient per Acre

pounds A.I. per acre desired x 100 = pounds of product to apply per acre
percent A.I. in product
4 lb/A x 100 = 5 pounds per acre
80% A.I.
pounds A.I per acre desired = gallons of product to apply per acre
pounds A.I. per gallon of product
3 lb/A = 0.5 gallons of product per acre
6 lb/gal.
capacity of spray tank x pounds or gallons of product per acre = pounds or gallons of product to put in spray tank
gallons of spray solution per acre
200 gallons x 5 pounds product per acre = 50 pounds of product per spray tank
20 gallons/A
         

 

Herbicide Act. Ingred. lb. per Acre Weeds When to Apply Remarks
EPTC (Eptam) 2 to 3 Annual grasses and some broadleaf weeds, not wild mustard Preplant followed by an immediate (within minutes) and thorough incorporation Use higher rates on heavy, high organic matter soils. Some stand reduction and temporary stunting may occur from the use of EPTC.
Cycloate (Ro-Neet) 3 to 4 Annual grasses and some broadleaf weeds, not wild mustard Preplant to a dry soil surface followed by an immediate (within minutes)and thorough incorporation Use lower rate only on light, sandy soils. Sugarbeets have better tolerance to cycloate than to EPTC. Following cycloate with a postemergence herbicide is suggested.
Pyrazon (Pyramin) 3.8 Most broadleaf weeds Preemergence or postemergence on soils with less than 5% organic matter. Can be used only postemergence on higher organic matter soils. Broadleaf weeds should be treated at the two-leaf stage Pyrazon used postemergence on high organic matter soils has given erratic results. Applying pyrazon to areas previously treated with a preemergence or preplant herbicide and adding a surfactant or oil to the postemergence spray solution has improved weed control with postemergence pyrazon. Preemergence pyrazon should be used with Preemergence TCA.
Pyrazon Dalapon (Pyramin Plus) 3.8 (pyrazon)
2.2 (dalapon)
Most annual grasses and most broadleaf weeds Postemergence when broadleaf weeds are in the two leaf stage The remarks with regard to pyrazon used postemergence alone (see above) still apply. A surfactant is included in this product.
Endothall (Herbicide 273) .75 to 1.5 Wild buckwheat smartweed marshelder Sugarbeets should have 4-6 leaves. Do not apply later than 40 days after emergence. Average temperature should be above 60° F. When temperatures are over 80° F., endothall may cause excessive injury especially to very small sugarbeets. Endothall is ineffective at temperatures below 60° F.
TCA (various names) 6 to 8 Most annual grasses except wild oats Preemergence Do not use sugarbeet tops for livestock feed.
Dalapon (Dowpon) 2 to 3 Most annual grasses Apply from emergence to 6-leaf stage of sugarbeets. Use directed spray after beets have 6 leaves Use high rate if grasses have over 2-4 leaves or if they are growing slowly due to dry conditions. Maybe applied more than once up to a minimum of 5.9 lb/A per year. Some yield reduction may occur from rates over 3 lb/A.
Phenmedipham (Betanal) 1 to 1.5 Most annual grasses and broadleaf weeds, not redroot pigweed Sugarbeets should have 2-4 leaves Use when weeds are between cotyledon and four-leaf stage. Use no more than 1 lb/A when following EPTC or TCA. Do not apply if temperature is over 80° F.
Diallate
(Avadex)
1 1/2 - 2 lb Sugarbeets Preplanting Incorporate immediately by cultivation.
1 1/2 lb Sugarbeets Fall--after October 15 and until freeze-up Incorporate shallowly by cultivation. Keep spring tillage to minimum.
Barban
(Carbyne)
12 to 16 oz Sugarbeets Wild oats - 1 1/2 leaf stage. Usually applied 4 to 9 days after wild oats emerge. Do not mix Carbyne with any other chemicals including fertilizers.

1971 Sugarbeet Research and Extension Reports. Volume 2, pages 67 - 71.


Red River Trade Corridor
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