Blackberry control manual - Weeds Australia

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Foliar spray application Spray plants from all sides if possible, including daughter plants. For sprawling blackberry, ensure all runners are adequately covered with herbicide. High-volume application High-volume application with a hand gun is the most common method for spraying blackberry. Thorough coverage of all parts of the plant is essential. High-volume spray equipment can be mounted on various vehicles. There is a wide range of equipment available. Spraying blackberry requires hand guns capable of delivering high pressures. High pressures are necessary to penetrate dense foliage and cover tall bushes. Hand guns capable of 5 – 15 bar (500 – 1500 kPa) are used for this kind of high volume spraying. Hand guns. Nathan Cutter (NSW DPI) and Silvan Nathan Cutter (NSW DPI) and Silvan All terrain vehicle (ATV) spot sprayer. Three-point-linkage spot sprayer. Jane West (NSW DET Centre for Learning Innovation) Nathan Cutter (NSW DPI) and Silvan Nathan Cutter (NSW DPI) and Silvan Spraying from a utility pack. Spray packs with electric diaphragm pumps. 51
Adjusting the nozzle towards a straight stream gives good penetration to wet stems and canes. The nozzle can then be adjusted back toward the wide-cone pattern to wet the foliage. Some hand guns come with a range of orifice discs. These are more versatile, as a change of orifice can deliver either a finer spray or a coarser spray, see Appendix 11 for information on orifice discs. Wide-cone spray. Straight stream spray (note that personal protective equipment is not being used because the operator is only spraying water as a demonstration). The pumps for these sprayers may have their own electric or petrol motors, or they may be power-take-off (PTO) driven. The hand guns may be attachments to booms on tractor three‐point‐linkages or all-terrain‐vehicles (ATVs), or they may be a dedicated unit on an ATV with its own small diaphragm pump used exclusively for spot spraying. They may also be a larger, tray‐mounted utility model with a petrol motor. All pumps should have pressure gauges and regulators to alter the pressure. Selection of an appropriate nozzle is also important. Nozzles can either give a straight stream or a cone pattern and are also available in a range of sizes to deliver finer and coarser droplets. The choice of nozzle on the hand gun will be determined by the weeds being sprayed and the herbicide(s) being applied. Tony Cook (NSW DPI) Tony Cook (NSW DPI) Herbicide labels will give a mixing rate (e.g. 500 mL/100 L water) but not always a spray or water rate. Even when a spray rate is given (e.g. 1500 – 4000 L/ha) the rate is not particularly helpful. The reason for this is that spray is not being applied to a flat surface. <strong>Blackberry</strong> leaves and canes need to be thoroughly wet with herbicide. Therefore, the volume needed to achieve good coverage will be about 50% more than if only the foliage had to be wet. To achieve good coverage, and to make sense of a rate range in hectares, it is better to think of spraying the volume enclosed by the canopy rather than the area of the canopy. Table 4.2 can be used to estimate the required spray rate for a bush. For example, a bush five metres in diameter and two metres high would need 14.9 litres of spray. When spraying sprawling blackberry bushes the outcome to be achieved is the same as for domed-shaped bushes: the leaves and canes should be thoroughly wet. The infestation should be treated in a systematic way to ensure that all of the bush, from the centre to the tips of each runner, is adequately wet with herbicide. Table 4.2 Estimating the spray rate required for a domed blackberry bush. Volume of spray per bush in litres, based on 3000 – 4000 L/ha Bush diameter (m) Bush height (m) 1.5 2 2.5 4 7 10.5 15 4.5 8.6 13.6 17.6 5 10.4 14.9 20.6 5.5 12.3 17.6 23.8 6 14.4 20.4 27.3 6.5 16.8 23.5 31.1 7 19.3 26.8 35.3 52
Page 1 and 2: Part 4 Blackberry control practices
Page 3 and 4: Case study Consider the long-term e
Page 5 and 6: Treatment before or after herbicide
Page 7 and 8: Herbicides at a glance Five conside
Page 9 and 10: Glyphosate MOA Group M, e.g. Roundu
Page 11 and 12: Case study Examples of using herbic
Page 13: Avoidance of standard foliar applic
Page 17 and 18: Cut-stump application This techniqu
Page 19 and 20: Tip: Large and dense infestations o
Page 21 and 22: Case study Improving access for con
Page 23 and 24: Case study Manual removal of blackb
Page 25 and 26: Grazing by goats and other livestoc
Page 27 and 28: Case study Burning blackberry The u
Page 29 and 30: Blackberry leaf rust fungus: powder
Page 31 and 32: Septoria leaf spot (Septoria rubi)

Blackberry control manual - Weeds Australia

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