Vol. 15â1961 - NorthEastern Weed Science Society
Vol. 15â1961 - NorthEastern Weed Science Society Vol. 15â1961 - NorthEastern Weed Science Society
28. As pre ·emergence applications of 2 to 4 pounds.to areas of grass seed crops infested with downy brome (Bromus tectorumL the control was promising. At rates of 10 to 20 pounds per acre, good control of field bindweed has also been reported. . Zytron A summary of the 1960research 'Work shows Zytron· to be .apromie ing and versatile compound. At rates of 15 to ;0 pounds per ecre as a pre-emergence spray, crabgrass control is good. The granular and liquid forms showed eqqally good results. These pre-emergence treatments have also been effective on carpet weed, chickweed, dooryard knotweed, pigweed, purslane, and Veronica species. Post-emergence applications as emulsifiable sprays have resulted 1n good control of chickweed and henbit on turf areas. In the vegetable group, good weed control was reported for carrots when applied a few days atter seeding, for 11ma beans when applied just atter seeding (12 to 18 J;lOunds), and as a pre-emergence treatment for annual weed and grass control in egg plant, peas and spinach, at 6 to 10 pounds per acre. Lay-by treatments on potatoes for late germinating annual grasses also looked good. Excellent results were reported from pre-emergence applications of Zytron plus dinitro on soybeans. A definite growth stimulation over and above the response expected from weed control was obtained with soyhaena. Zytron also appears to be effective for the control of soee annual weeds and grasses in ornamentalnurse1'1 plant1l:lSS and foreet· tree nurselrY seedling·: beds.
THE EFFECTS OF ADDED PENETRANT AIDS AND , ETTING AGENTS ON THE RESPONSE OF QUACKGRASS (!~gropYron repens (L. ) Beauv, ) TO DALAPON by J. K. Leasure 1 INTRODUCTION Since its introduction in 1953, 2, 2-dichloropropionic acid (dalapon) has been of considerable interest because of its practical selectivity with grasses. In addition to many field trials, a large number of more detailed exper-iments have been conducted in attempts to determine its sites of action in plants, the method by which it is translocated in plants, and its ultimate fate in both plant t'issue and soil. A number of experiments have been conducted with and without wetting agents. The present study was under . taken to determine the effect of some surface active agents on the translocation of sodium dalapon into the rhizomes of quackgrass(AgroPlron repen! (L. ) Beauv.}, as part of a continuing progress to improve the effectiveness . of dala pon form ulations. REVIEW OF LITERATURE There is ample evidence in the literature ,that spray additives which have surface-acti.ve char~ctar~tilf}. c~~\increase the effectiveness of a number of herbiCldes(2, , , , , '; It has been pointed out(4) that differences may exist in the effectiveness of herbicide formulations even with equal wetting, and that considerable care in the selection ofa wetting agent is required. Daniels(3) refers to a relationship existing between the ionic character and the relative polarity of a compound which suggests that the addition of suitable surfactants to a strongly ionic, hydrophylic, polar compound such as sodium 2, 2-dichloropropionate (sodium dalapon) might very well cause such a formulation to become more compatible with non-polar materials such as those fOlmd in. the cuticle of plants. -- IThe Dow Chemical Company, Midland, Michigan.
- Page 1 and 2: THE USE OF VEGETATIVECHARACTERISTIC
- Page 3 and 4: In a few grasses with smooth sheath
- Page 5 and 6: 5. FACTORSINFLUEUCINGTHE PERFORFANC
- Page 7 and 8: 7. The introduction of synthetic or
- Page 9 and 10: The com;onents the distribution of
- Page 11 and 12: grains. We early found that the oat
- Page 13 and 14: 13. Atrazine Days following cpm/O.
- Page 15 and 16: 15. not find an abundant production
- Page 17 and 18: Weed Control In Suburbia 1 Howard H
- Page 19 and 20: For establishing new lawns, I would
- Page 21 and 22: Any improvement that you can make i
- Page 23 and 24: PROMISINGNEWCHEMICALSFORWEEDCONTROL
- Page 25 and 26: 25. Promis ins results have also be
- Page 27: 27. (Lycbnis alba), cinquefoil (Pot
- Page 31 and 32: ... Surfactant Produced bz: . 31
- Page 33 and 34: 33. 33. of scintillation solution,
- Page 35 and 36: Table 3. The Net Counts Per Minute
- Page 37 and 38: The comparisons for lower leaves, s
- Page 39 and 40: 39. SUMMARY Tests using 2-C 14-1abe
- Page 41 and 42: 41. RECENTDEVELOPMENTS IN THEUSE OF
- Page 43 and 44: second application be made not late
- Page 45 and 46: 45. Combinations of vegadex-Randox
- Page 47 and 48: 11/ Persistence of Soil-Incorporate
- Page 49 and 50: Plot size varied from 9 sq. ft. to
- Page 51 and 52: Lower rates of R-1856 were tested o
- Page 53 and 54: greenhouse tests are listed below.
- Page 55 and 56: PROGRESSREPORTON LAY-BYUEEDCONTROLI
- Page 57 and 58: 57. Table 1. Effect of sodium silic
- Page 59 and 60: Sheets (1959) studied, under labora
- Page 61 and 62: M, ',. • • •• • " ' Treat
- Page 63 and 64: Figure 1. Relative performance trea
- Page 65 and 66: A duplicate test was started August
- Page 67 and 68: 67. "he two tests which dealt with
- Page 69 and 70: 69. CONTROLOF WEEDSIN VEGETABLECROP
- Page 71 and 72: 71.' TABLE 3. RESPONSE OF VEGETABLE
- Page 73 and 74: 73. COHBIltit.TloNS' OF cnu:'PITH C
- Page 75 and 76: 75. Results The delay in applicatio
- Page 77 and 78: 77. Summary Logarithmic, tank-mixed
28.<br />
As pre ·emergence applications of 2 to 4 pounds.to areas of grass seed<br />
crops infested with downy brome (Bromus tectorumL the control was promising.<br />
At rates of 10 to 20 pounds per acre, good control of field bindweed<br />
has also been reported. .<br />
Zytron<br />
A summary of the 1960research 'Work shows Zytron· to be .apromie ing and<br />
versatile compound. At rates of 15 to ;0 pounds per ecre as a pre-emergence<br />
spray, crabgrass control is good. The granular and liquid forms showed<br />
eqqally good results. These pre-emergence treatments have also been effective<br />
on carpet weed, chickweed, dooryard knotweed, pigweed, purslane, and Veronica<br />
species. Post-emergence applications as emulsifiable sprays have resulted 1n<br />
good control of chickweed and henbit on turf areas.<br />
In the vegetable group, good weed control was reported for carrots when<br />
applied a few days atter seeding, for 11ma beans when applied just atter<br />
seeding (12 to 18 J;lOunds), and as a pre-emergence treatment for annual weed<br />
and grass control in egg plant, peas and spinach, at 6 to 10 pounds per acre.<br />
Lay-by treatments on potatoes for late germinating annual grasses also looked<br />
good.<br />
Excellent results were reported from pre-emergence applications of Zytron<br />
plus dinitro on soybeans. A definite growth stimulation over and above the<br />
response expected from weed control was obtained with soyhaena.<br />
Zytron also appears to be effective for the control of soee annual weeds<br />
and grasses in ornamentalnurse1'1 plant1l:lSS and foreet· tree nurselrY seedling·:<br />
beds.
Change language