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FAcTS ON BASAl BARk ApplicATiON OveRDOSe. Spraying needless or excess amount of SOlUTiONS: Pump only once when pressuring backpack, pump less often, drain down pump – i.e. spray with Garlon Ultra, Garlon TM RTU RTU and herbicide and diluent on treatment zone, the use of Oone- back into the tank to reduce pressure. Release MSO herbicide. TM Ssided treatment when sStreamline treatment is sufficient and creating huge wrap on treated stems are all examples DilUeNTS of potential overdose. Experience has shown that off-the-shelf mineral oil Basal bark applications provide effective, highly This inward movement reaches and penetrates the cambium SOlUTiONS: Do not spray up and down during Oone- such as ISOPAR M works well and poses little risk to ® selective control of trees and brush for industrial (conductive tissue) and results in the herbicide creating a sided treatments or back and forth during Sstreamline the environment or users. While it is not particularly and forestry uses, such as conifer release or chemical girdle of the stem. Complete control depends on treatments. Use one-pass treatments, use a short and harmful when in contact with skin, it will de-fat the skin thinning. Dow AgroSciences supplies specialized the stem being entirely encircled – termed “wrap.” Once quick trigger pull (i.e. flick and let go), change nozzle to (dissolve the fat near the surface) leaving white patches vegetation management herbicides ideally suited the chemical girdle is formed, it acts like a physical girdle to one size down (i.e. from 0.3 to 0.2). of skin – which if left unattended, may result in dermatitis to basal bark application: prevent downward movement of nutrients to the roots, thus eMUlSiFicATiON. Emulsifier present in Release MSO, conditions. Immediate washing with soap and water will • New Garlon TM RTU- Ready to Use for industrial eventually killing the treated plant. Garlon RTU or Garlon Ultra is activated by “free” water prevent this condition. Applicators should always wear vegetation management, forestry and range & the proper personal protective equipment when dealing FAcTORS AFFecTiNG on the stem. The diluent/herbicide mixture is now an pasture uses. with diluents. TReATMeNT emulsion (oil droplets encased in water) and can no • Garlon Ultra for industrial vegetation management Optimal results are achieved when applications are made to longer penetrate bark, so spray turns milky and runs • Avoid the use of mineral oils above 25°C as they are and range & pasture uses. young vigorously growing stems which have not developed down the stem instead of creeping around the stem. lighter oils and have the potential to volatilize. Garlon • Release TM MSO for forestry uses. the thicker bark characteristic of slower growing older trees. SOlUTiONS: Wait for stems to dry; move treatment RTU contains a mineral oil diluent in its formulation. zone up to avoid “free water” on the base caused by The active ingredient (triclopyr) readily penetrates “Free water” on stems resulting from melting frost, wet • For Garlon Ultra and Release MSO canola oil is melting frost, wet snow, or rain. the bark and enters the cambium layer of target snow or rain, causes emulsification and failure to penetrate recommended and used when daytime temperatures species. From the cambium, it moves throughout the bark. Emulsified herbicide runs down the treated stem like vOlATiliTy. If mineral oil diluent is used in daytime exceed 25°C. Canola oil is a “heavier” oil and will nutrient and water movement systems of the plant, water, showing no evidence of “wrap.” If the wetting front temperatures above 25°, or on a south exposed area prevent volatilization of the solution from the stem. even into the roots to prevent re-sprouting. formed by the oil in the bark does not wrap, then control is where “an oven” environment could occur, chemical Canola oil cannot be used when temperatures are likely to be incomplete. instability of oil could lead to poor efficacy and could risk below 10°C, and is generally not recommended ADvANTAGeS off-target damage to desirable plants. FROST. If no emulsification occurs (dry frost), then unless your average temperature during application is • Effective year-round, for selective control of trees and the solution is working. If the oil solution does not SOlUTiONS: Change to a more appropriate diluent. above 25°C. The oil becomes too thick and improper brush. penetrate the frost (ice), shut down the application. application occurs in cool temperatures. vApORizATiON. If a backpack sprayer is over • Can be applied at any time of the year, including the Watch for frost as temperature rises above 0° C and pressured, the spray solution comes out as very small • Do not spray when temperature exceeds 28°C. moisture appears on stems. winter months, except when snow or water prevents particles and turns to a gas before hitting the target. MixiNG spraying at the desired height above ground level. pOTeNTiAl SpRAy DRiFT. Keep application pressure low A common warning sign is sprayer operators may Place the required amount of diluent in the mixing tank, • Year-round usage allows efficiency in crew allocation to prevent vapour drift. Small quantities of vapour drift, complain of headaches. Over-pressuring lowers efficacy add Garlon Ultra or Release MSO and mix thoroughly. and supervision. which may not be visible, can seriously injure susceptible and increases chance for off-target injury. When mixing with diluent oils, read and follow the use plants and sensitive non-target vegetation. • Can be used where foliar applications aren’t directions and precautions on the product label prepared RAiN. Basal bark and cut stump applications cannot be convenient, such as on steep or uneven terrain. by the oil manufacturer. made to wet stumps or emulsification may occur and • Applications are targeted, greatly reducing the Garlon RTU does not require any mixing. the target trees will not be controlled. However, rain potential for injury to off-target vegetation. immediately after an application will not affect the efficacy • Minimized impact on environmentally sensitive or of the product as it will have already entered the bark. erosion prone areas. SNOw. When snow prevents access to ground line at HOw BASAl BARk TReATMeNTS wORk the base of target trees, one-sided application should be Young bark is lipophilic, meaning its structure acts like an stopped. Two-sided streamline application should be used open lattice, and allows fatty substances to move readily on larger stems to assure wrap. within it. That is why Release MSO or Garlon Ultra mixed TeMpeRATURe. Do not apply Garlon Ultra and with an oil carrier is able to move within and through young Release MSO when the temperature is below –10°C. bark tissue. New Garlon RTU is formulated with an oil carrier Slight coagulation may form, which can plug spray and is ready to use with no mixing required. Basal bark nozzles. Garlon RTU can be applied at temperatures AccOMpliSH MORe. ON THe SAMe AcReS. wiTH DOw AGROScieNceS. treatments work best on young tender bark. below –10°C, but applicators need to stop operations if cAll THe SOlUTiONS ceNTeR AT 1.800.667.3852 OR viSiT DOwAGRO.cA. coagulation begins to occur. *Trademark of Dow AgroSciences LLC. TM ® All products are registered trademarks of their respective companies. 0110-13161 ApplicATiON MeTHODS ReqUiReD SpRAy eqUipMeNT MAxiMiziNG eFFecTiveNeSS OF BASAl BARk TReATMeNTS STReAMliNe cUT STUMp • lOw pReSSURe BAckpAck SpRAyeR: Piston pump • Carry spare pump/operating arm link pins and hair pins. This has proven to be the fastest and most effective method pressure control system with aflack, vicon or nitrile • Carry spare nozzles, seats and changing wrench. This method is excellent for prevention of re-sprouting. of basal bark application. Best results are on young, actively seals (i.e. Hardi K-15, YardmasterTM 189). Use separate It also reduces the need for repeated cutting of large • In the pre-job evaluation decide on the nozzle angle, growing stems less than 8 cm in diameter. sprayers for basal bark applications to prevent emulsion diameter stumps of species that sprout from the base or know what “wrap” is and how to use it to judge from water in the backpack. Basal bark sprayers require • For Garlon Ultra and Release Release MSO, use 20 to sucker from roots. Applications may be made to both old treatment effectiveness. a positive shutoff to eliminate drips and different nozzles 30 litres of herbicide in enough diluent to make 100 litres and freshly cut stumps. This provides more consistent than those for foliar applications. Many foliar sprayers − Keep pressure low, nozzle 2 – 4 cm from target and of spray solution (20 to 30 percent). Use the 30 percent results than treating stumps with glyphosate, which must also have pump pressure too high for basal bark make a single, smooth treatment pass. solution for harder-to- control species such as hardwood be applied immediately after the cut is made. application. − On large stems, use Streamline until “wrap” fails, trees, or when applying in the dormant season. • For Garlon Ultra and Rrelease MSO, use 20 to 30 litres of • wAND: Spray gun with a light trigger, shutoff at then use Two-sided or Three-sided Streamline as • For Garlon RTU there is no need for mixing with a herbicide in enough diluent to make 100 litres of spray nozzle, having teflon or nitrile seals, and of a length necessary to achieve wrap within 30 minutes. diluent. Simply pour into the backpack or spray tank. solution (20 to 30 percent). Use the 30 percent solution suited to method of treatment. One-sided treatment − Speed and ease of monitoring by the sprayer are for harder-to- control species such as hardwood trees, or • Achieving complete “wrap” of the solution around the requires wands of 16 – 18”, while wands of 12 – 16” greatest with Streamline application. when applying in the dormant season. entire stem circumference is essential to effectiveness. are appropriate for Streamline treatment. • For Garlon RTU there is no need for mixing with a − Switch from streamline to one-sided treatment if • Spray 30 to 50 cm above ground level: • NOzzleS: Flat fan pattern, stainless steel, narrow treating a few, scattered larger stems among large diluent, simply pour into the backpack or spray tank. – For stems less than 8 cm basal diameter, spray a angle (15° to 25°), large orifice (0.2 or 0.3) such numbers of smaller stems, or when treating conifers. • Thoroughly wet the stump, including: as SS1502, SS1503, SS2502, or SS2503. On larger band 5 cm wide on one side of each stem. − Use Two-Sided Streamline when many larger (> 6 – Cut surfaces, especially the cambium layer just inside trees (> 8 cm dbh) where One-Sided or Cut Stump – For stems 8 to 15 cm basal diameter, spray a band –12 cm diameter) stems are being treated or if any the bark. treatments are being performed, a wider angle, large 5 cm wide on two sides of each stem (Two-sided portion of the lower 30 cm of target stems have free Streamline). – The remaining bark to the ground line, including the orifice nozzle (2503) should be used. On smaller trees water on them. root collar. (< 5 cm dbh) where Streamline treatment is being • With sufficient volume, the treated zone should widen to • Use minimum effective concentration for the target performed, a narrow angle, small orifice nozzle (1502 encircle the entire stem circumference within 30 minutes. species and season of application. or 1503) should be used. • Only spray once – no back and forth or up and down. SeTTiNGS FOR eFFecTive ApplicATiON • Do NOT pull gun “full on”. • Lowest possible pressure to generate a straight stream 5cm “braided trickle”. • NO DRIPS. Use a positive shutoff spray gun. • Correct nozzle orientation: • Know what emulsification is, what it looks like and – Streamline treatment: fan vertical. what it means: STOP SPRAYING WHEN YOU SEE IT. – One-Sided treatment: fan horizontal. pROBleMS AND SOlUTiONS • Nozzle 2 – 4 cm from target point on stem. BlOw-By. Spray mixture sprays past target stem onto cARe AND MAiNTeNANce OF eqUipMeNT adjacent vegetation and ground or snow, making stained ground or snow behind target trees when using dye. • Use filter when filling. SOlUTiONS: Move nozzle closer to target, keep • Tighten pump clamp ring twice daily. backpack pressure down, shorten dwell time, achieve a • Wipe outside of pack with dry cloth/paper towel after tighter sweep across target zone when using Sstreamline each fill. treatment, change nozzle angle (i.e. from 25° to 15° fan). • Replace a main flack seal on pump every other year. SpATTeR. Spray mixture “bounces” back off target • Replace shut-off valve seat on spray gun as soon a drip stem, making “stained” ground or snow in front of target For stem less than 15cm basal diameter. occurs. tree when using dye. Best results on stems less than 8cm basal diameter. • Install higher quality braided hose on backpack SOlUTiONS: Prevent excess pressure buildup in immediately upon purchase. backpack by pump only once when pressuring backpack, • Support first 10 cm of hose with outer case of larger pump less often, drain down pump – i.e. spray back into diameter hose. the tank to reduce pressure.
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