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Table 47. Weed Management in Brambles

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Table 47. Weed management in brambles†.
Weed Problem Herbicide Rate/Acre Comments and Limitations
TRANSPLANT YEAR
PREEMERGENCE WEED CONTROL
Annual grasses and small seeded broadleaf weeds (HRAC K3, WSSA 15) (napropamide)
Devrinol 50DF
Devrinol 10G
8 lb
40 lb
Apply after transplanting to weed-free soil. Devrinol must be activated within 24 hrs by cultivation or enough water by irrigation or rainfall to wet the soil to a depth of 2 to 4 inches. The full rate may not be necessary at transplanting.
(HRAC K1, WSSA 3) (oryzalin)
Surflan AS
Surflan DF
2-6 qt
2.4-7.1 lb
Do not apply until soil has settled around the plants and no cracks are present. Irrigation or 1 inch of rain is needed within 21 days of application. Shallow cultivation will improve control. May injure newly planted tissue culture plants.
Broadleaf weeds and some grasses (HRAC C1, WSSA 5) (simazine)
Princep 4L
Princep Caliber 90
1-2 qt
1.1-2.2 lb
Use to improve the broadleaf weed activity of Devrinol or Surflan. Consider applying half the maximum rate after planting and half in the fall before winter annuals emerge. Do not use on newly transplanted tissue culture plants.
Broadleaf weeds only (HRAC L, WSSA 21) (isoxaben)
Gallery 75D
0.66-1.33 lb NON-BEARING USE ONLY. Do not apply within 1 year of the first harvest. Do not apply over the top of plants but as a directed spray to the base of plants after the soil had settled. Does not control emerged weeds. Controls many broadleaf weeds from seed. See label for a complete list.
POSTEMERGENCE WEED CONTROL
Emerged annual and most perennial grasses (HRAC A, WSSA 1) (fluazifop)
Fusilade DX
16-24 oz NON-BEARING USE ONLY. See label for best times to treat specific weeds. Will not control broadleaf weeds or sedges. Do not apply to crops to be harvested within 1 year of application. Do not apply if rainfall is expected within 1 hour or if grasses are under drought stress. Must be used with a crop oil concentrate or non-ionic surfactant.
(HRAC A, WSSA 1) (sethoxydim)
Poast
1-2.5 pt See label for best times to treat specific weeds. Will not control broadleaf weeds or sedges. Do not apply to grasses under stress (e.g., drought). Crop oil concentrate must be added to the spray tank. Do not cultivate 5 days before or 7 days after application. Do not apply more than 5 pints per acre per season.
Most grass weed species (HRAC A, WSSA 1) (clethodim)
Arrow 2EC
Select Max
6-8 oz
9-16 oz
Use the lower rate to control annual grasses and the perennial grasses listed to the left. Repeat the application if regrowth occurs. Always add oil concentrate to be 1 percent of the spray solution, or a minimum of 1 pint per acre, to Select 2EC. Always add oil concentrate to be 1 percent of the spray solution, or a minimum of 1 pint per acre, or nonionic surfactant to be 0.25 percent of the spray solution to Select Max. Do not tank-mix with any
other pesticide unless labeled. Do not apply within 1 hour of rainfall. Do not apply to grasses suffering from drought, heat, cold, or any other stress condition. Select 2EC is currently labeled for nonbearing fields only. Do not apply within 12 months of harvest.
Emerged annual weeds and suppression of perennial weeds (HRAC & WSSA none) (pelargonic acid)
Scythe
3-10% solution Contact material for burn down only. See Scythe comments on page in Strawberry section. See label for complete instructions.
Emerged annual and perennial weeds (HRAC G, WSSA 9) (glyphosate)
Roundup, Touchdown
1 to 5 pt Apply to actively growing weeds. Apply with a wiper or a shielded/directed spray. Do not allow the spray, spray drift, or mist to contact green foliage, suckers, open wound, or other green parts of the plant. Consult the label for rates for specific weeds and other precautions. Use with a surfactant or wetting agent.
Weed Problem Herbicide Rate/Acre Comments and Limitations
ESTABLISHED PLANTINGS
PREEMERGENCE WEED CONTROL
Annual grasses and small seeded broadleaf weeds

(HRAC K3, WSSA 15) (napropamide)
Devrinol 50 DF

Devrinol 10G

8 lb

40 lb

Apply in the early spring before seedling weeds emerge. Devrinol must be activated within 24 hours by shallow cultivation or with enough rainfall or irrigation to wet the soil to a depth of 2 to 4 inches.

(HRAC K1, WSSA 3) (oryzalin)
Surflan AS

Surflan DF

2-6 qt

2.4-7.1 lb

Apply to weed-free soil in the spring. Irrigation or 1 inch of rainfall is needed within 21 days of application.
(HRAC F1, WSSA 12) (norflurazon)
Solicam 80DF
2.5-5 lb Apply in early spring when crop is dormant to clean and weed-free soil. May result in temporary bleaching or chlorosis of leaves from which the plant will recover. Do not use on nursery stock.
NOTE: For broad spectrum preemergence weed control, consider applying one of the above four “grass” herbicides (napropamide, oryzalin, metolachlor or norflurazon) in addition to one of the following “broadleaf” herbicides (simazine, terbacil, mesotrione or dichlobenil).
Broadleaf weeds, some grasses, and suppression of some perennial weeds

(HRAC C1, WSSA 5) (simazine)
Princep 4L

Princep Caliber 90

2-4 qt

2.2-4.4 lb

Apply in the spring before bud break and before weeds emerge, or in the fall. Do not apply when fruit is present. For improved control as well as quackgrass suppression apply half in the spring and half after harvest. May injure ‘Royalty’ raspberries.
(HRAC C1, WSSA 5) (terbacil)
Sinbar WDG
1-2 lb Apply in the early spring or in the fall as a directed spray to the base of the plants. Will also control small emerged weeds. Do not contact new shoots and avoid contact with bramble foliage. Spring application must be made before fruit set. Avoid application on plantings low in vigor. Planting must be at least 1 year old before application. Do not apply within 70 days before harvest.
(HRAC L, WSSA 20) (dichlobenil)
Casoron CS
Casoron 4G
1.4-2.8 gal
100 lb
Apply at temperatures below 40˚F, preferably just before rain or snow. Soil must be settled around established plants. Uniform application is essential. Do not apply during new shoot emergence. Effective on many perennial weed species. May reduce/delay new shoot emergence in plantings that are young or lacking vigor.  There is a leaching risk with this product however both the granular ($G) and microencapsulated (CS) formulations have reduced leaching potential compared to the wettable powder formulation used previously.

(HRAC B, WSSA 2) (rimsulfuron)

Matrix SG

4 oz Apply as a directed spray to the base of the crop prior to bud break in the spring. Applications should be made either pre-emergence or early post-emergence to weeds. May be applied twice per year with at least 30 days between applications. Crop should be at least 1 year old. MAINE ONLY.
Broadleaf weeds and nutsedge

(HRAC B, WSSA 2)

(halosulfuron)

Sandea

0.5-1 oz Applications should be made prior to primocane emergence or after cane burning. Avoid contact with canes. Contact will result in temporarty chlorosis of treated leaves. Use of a shield is recommended.
POSTEMERGENCE WEED CONTROL
Emerged annual grasses and broadleaf weeds. Suppression of emerged perennial weeds.

(HRAC D, WSSA 22) (paraquat)
*Gramoxone SL2.0

*Firestorm

2-4 pt

 

1.3-2.7 pt

Contact herbicide. Use with a non-ionic surfactant. Apply as a coarse directed spray to wet the weeds. Apply before emergence of new canes or shoots to avoid injury. Use of a shield is highly recommended.

(HRAC E, WSSA 14) (carfentrazone)

Aim EC

1-2 oz Apply as a directed spray to the base of the crop to burn down emerged weeds including morning glory, nightshade, bedstraw and ferns. Do not use more than 6.1 oz/year. Contact with the crop will cause damage. Requires a non-ionic surfactant or crop oil concentrate.
Emerged annual and most perennial grasses (HRAC A, WSSA 1) (sethoxydim)
Poast
1-2.5 pt See label for best times to treat specific weeds. Will not control broadleaf weeds or sedges. Do not apply to grasses under stress (e.g., drought). Crop oil concentrate must be added to the spray tank. Do not cultivate 5 days before or 7 days after application. Do not apply within 45 days before harvest in brambles. Do not apply more than 5 pints per acre per season.

(HRAC A, WSSA 1) (clethodim)

Select Max

9-16 oz Apply as a directed spray to the base of the crop and to actively growing grasses. Grasses under drought stress will not be controlled. Do not apply more than 64 oz/acre/year. Do not repeat applications within 14 days.
Emerged annual weeds and suppression of perennial weeds. (HRAC & WSSA none) (pelargonic acid)
Scythe
3-10% solution Contact material for burn down only. See Scythe comments in Strawberry section. See label for complete instructions.
Emerged annual and perennial weeds (HRAC G, WSSA 9) (glyphosate)
Roundup Ultra, Touchdown
1-5 qt Apply to actively growing weeds. Apply with a wiper or a shielded/directed spray to the base of the plants. Do not permit herbicide solution to contact desirable vegetation, including green shoots, canes, or foliage. Do not cultivate within 7 days after application.
Broadleaf weeds and Nutsedge

(HRAC B, WSSA 2)

(halosulfuron)

Sandea

0.5-1 oz Applications should be made prior to primocane emergence or after cane burning. Avoid contact with canes. Contact will result in temporarty chlorosis of treated leaves. Use of a shield is recommended.
†Where brand names for chemicals are used, it is for the reader’s information. No endorsement is implied, nor is discrimination intended against products with similar ingredients. Please consult pesticide product labels for rates, application instructions and safety precautions. Users of these products assume all associated risks.
*Restricted use pesticide; pesticide applicators license required. OMRI listed for organic production
Table 48. Weed management with and without herbicides in a bramble planting.
Year Month Herbicide Options Non-herbicide Options
Planting year
  Fall prior to planting Glyphosate for emerged perennial weeds. Frequent tillage
  April-early May Surflan or Devrinol before weed seedlings emerge. Till or water in within 24 hours Plant sod in row middles. Use mulch in planting rows for 1st year. Hand weed
  Mid-June after planting Fusilade, Poast, Select or Arrow for perennial grasses before 6” of growth Cultivate/hand weed/mulch; mow row middles and borders
  Mid-July Hand weed or Glyphosate spot treatments Cultivate/hand weed; mow row middles and borders
  October Princep at low rate Cultivate/hand weed; mow row middles and borders
  Late November Casoron for grasses and broadleaf weeds. Read label carefully for specific application requirements Hand weed if needed
Fruiting years
  March-April Princep or Sinbar for broadleaf weeds. Devrinol, Surflan or Solicam for annual grasses. Poast or Select for perennial grasses. Poast or Select may need to be reapplied in 14 days or can be substituted with a cultivation if possible. Hand weed rows and mow row middles and boarders
  Early May Aim, Gramoxone or Scythe before new cane emergence. Hand weed and mow row middles and borders
  Mid-Summer Poast or Select on actively growing grasses Hand weed and mow row middles and borders
  September to October Sinbar, Devrinol, Solicam, Surflan, Princep. See labels for restrictions. Hand weed and mow row middles and borders
  November Casoron if needed for grasses and broadleaves. See labels for restrictions.