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Top 8 application tips to maximise performance of Spray.Seed

Vineyard
08.09.2017

When applying SPRAY.SEED® in horticulture there are a number of things you need to consider to ensure you maximize the performance of the product. Here, we set out our top 8 Application Tips to help you get the best out of your application.

Ultimately, with each of the below tips, you want to aim for even and complete coverage of the target weed.  For example, application of SPRAY.SEED to small actively growing weeds in 200L/ha of water with Medium to Coarse droplets is far better than using 800L/ha on large weeds where a significant proportion of the applied volume runs off and the other droplets that hit the target are too large to provide good coverage.

 

Top 8 Application Tips

  1. Aim to spray small weeds. Large weeds require higher water volumes and chemical rates and are more difficult to control.
  2. SPRAY.SEED is formulated to deliver adequate adjuvant when applied at 2.4L/ha in 200L of water. If SPRAY.SEED is applied at a more diluted concentration than 2.4L in 200L/ha of water then additional surfactant will be required to maintain efficacy (refer to Figure1).
  3. For improved control of hard-to-control weeds e.g. Wireweed, Capeweed, Marshmallow and Nettles, a Group G spike e.g. Goal* (at rates up to 250mL/ha) or Hammer* are good options.
  4. If weeds are large it is desirable to use the “double-knock” technique to deliver more reliable weed control. This technique requires the application of a robust rate of glyphosate followed 1-14 days later by a robust rate of SPRAY.SEED to weeds.
  5. Avoid spraying dusty weeds or use of dirty water. SPRAY.SEED activity will be severely reduced under these conditions.
  6. If weeds are small due to moisture stress they may in fact be suffering from small tops and large roots. This gives a false impression of weed size and when lower than ideal product rates are used, weed control may be reduced. What may seem small may in fact be more advanced than meets the eye.
  7. Consider using Air Induction (AI) nozzles and increasing water volumes to ensure you are thoroughly covering the target weeds and minimising off target drift.
  8. Avoid applying SPRAY.SEED under high temperature / low humidity conditions (i.e. Delta T >10°C (refer to Figure 2).

 

Figure 1: Surfactant selection guide

When the dilution ratio of SPRAY.SEED to water is greater than 2.4L in every 200L of water applied, additional surfactant will be required. eg if using 2.4L of SPRAY.SEED in 300L/ha of water additional surfactant is required.

Figure 2: Recommend Delta T spray calculations using relative humidity (%) and temperature (oC)

Recommend Delta T spray calculations using relative humidity (%) and temperature (C)

 

Download the Spray.Seed Application Recommendations Technote