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.