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APPLICATION TIPS FOR CONTROL OF APHIDS IN CANOLA

Release Date 30 June 2015

 



Release Date
30 June 2015

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Key Points


Recent outbreaks of aphids in WA canola have seen growers looking for alternatives to traditional insecticides, which can be harsh on beneficials and rapidly develop resistance.

BIOPEST® has been proven with independent replicated field work to provide cost effective control of cabbage and turnip aphid as well as green peach aphid, without harming beneficial populations.

Here are some tips to maximise the efficacy of BIOPEST® on aphids in canola;

  • BIOPEST® kills existing aphids by physical smothering, so good coverage is essential. Keep water volumes as high as possible (80-100L/Ha), with a medium spray quality and BIOPEST® rate at a minimum of 2L/Ha.
  • Coating leaf surfaces with BIOPEST® will also prevent populations building by acting as a deterrent to juvenile production, so apply early to developing populations to provide greater control.
  • On the flowering parts of larger plants, efficacy on aphids is excellent due to their physical exposure. However, as BIOPEST® has no translaminar or systemic activity, aphids on the underside of leaves on smaller plants can be more difficult to control (see Figure 1), particularly as new unprotected leaves emerge.
  • To protect new growth on smaller pre-flowering plants, aphid populations should be monitored and consideration given to follow up applications within 10 days.
  • BIOPEST® is extremely soft on beneficials (see Table 1), particularly mobile insects such as lacewings and predatory wasps. Monitoring and maintenance of these beneficial populations is an important part of any management strategy.
  • If beneficial insects aren’t a concern and infestation is severe, consider tank mixing with a standard insecticide to provide additional activity and reduce reliance on one mode of action.
  • BIOPEST® doesn’t require warm conditions for activation and is generally rainfast within a four hour period or when the leaf surface is dry. Unlike other insecticides BIOPEST® will not cause dead aphids to drop from the plant, providing a useful food source for beneficials.
  • For single pass disease and insect control, BIOPEST® can be tank mixed with sclerotinia fungicides or liquid UAN to act as a deposition agent and provide an aphid anti-feed effect prior to populations building. More information on the role of BIOPEST® in managing sclerotinia will be published shortly.

 


References


Cotton Research Compendium ‘Leaders in spray oil and adjuvant technology for the cotton industry’ 2003-2010
http://www.dpi.nsw.gov.au/agriculture/field/field-crops/fibres/cotton/cotton-pest-management-guide

 


Disclaimer and Copyright

This document should act as a guide only and no purchase or usage decisions should be made based on the information provided without obtaining independent, expert advice. SACOA and contributors do not necessarily recommend or endorse any products or manufacturers referred to. SACOA Pty Ltd will not be liable for any loss, damage, cost or expense incurred or arising by reason of any person using or relying on the information contained in this document. More information is available from SACOA via sacoa.com.au or 08 9386 7666, or by contacting your local reseller.
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