Conserve™ Plus and Conserve On-Farm (applied at the label rate) treat grain at just below 1 ppm (1 g spinosad/tonne of grain). There is a nil withholding period for human and animal consumption, and importantly there are no meat residue bioaccumulation concerns for livestock fed with treated grain. An Australian cereal grains maximum residue limit (MRL) has been set for spinosad at 1 ppm, with other markets varying from 1.5 to 2 ppm depending on the country and commodity treated. Due to the slow degradation of spinosad, in short to mid-term storage scenarios, the residue on the grain at out-turn will be at – or just below – the original level at treatment (i.e. at the Australian MRL) as indicated in the graph on the right (Dow AgroSciences internal trial).
To ensure that there is no risk to trade it is important to ensure that any grain protectant containing spinosad is only applied once.
MRLs for spinosad in cereal grains have been established in all key Australian cereal grain markets including, Australian domestic, EU, Japan, USA, Taiwan and all countries that accept Codex residue limits. These MRLs (ppm) are summarised in the table below:
Click image to enlarge
In Australia, MRLs are set by the Australian Pesticides and Veterinary Medicines Authority (APVMA) (http://www.apvma.gov.au/residues/standard.php). Australian MRLs may differ from those established by foreign countries and the International Codex Alimentarius Commission (“Codex”). Therefore, grain exporters must be aware of MRLs of importing countries and which countries accept Codex MRLs. Information on international MRLs may be accessed directly from foreign government websites or the National Residue Survey (NRS) grains database at: http://www.daff.gov.au/agriculture-food/nrs/nrs-australian-and-overseas-mrl-database. MRLs for the Reldan component of Conserve On-Farm have not changed and can also be found by following the links above.
Feeding or selling treated grain
Despite a nil WHP for grain treated with Conserve Plus and Conserve On-Farm, grain should not be moved for 24 hours after it has been treated. This is to allow the product time to bind to the grain. When selecting the OP mixing partner for Conserve Plus, note the OP selected and rate used (fenitrothion) may then require a WHP apply. Durum wheat is often designated PRF, as it is regularly sold into European markets, which have low MRLs for grain protectant compounds.
Which commodities can be treated with Conserve Products?
Conserve Plus is registered for use on all cereal grains. Conserve Plus should NOT be applied to any cereal grain to be sold into markets designated Pesticide Residue Free (PRF). Importantly, before application, please check with your grain marketer/buyer as to their acceptance of protectant residues on grain you intend to sell. Please note, recent regulatory changes (July 2017) to export markets following CODEX pesticide residue guidelines, now limits acceptance of cereal commodities treated with chlorpyrifos methyl (ie contained in Conserve On-Farm, Reldan grain protector, Reldan Plus IGR), from “all cereal grains”, to now only be “wheat and barley”. All domestic markets remain unaffected by these changes, it only is relative for importing markets following CODEX.
Conserve On-Farm is registered for use on all cereal grains, excluding, maize, malting barley and rice. Noting the new CODEX commodity acceptance for chlorpyrifos methyl, Conserve On-Farm should also NOT be applied to any cereal grain to be sold into markets designated Pesticide Residue Free (PRF). Durum wheat is often designated PRF, as it is regularly sold into European markets, which have low MRLs for grain protectant compounds. Oilseeds and pulses (and the processed fractions of these commodities) must not be treated with Conserve On-Farm because MRLs have not been established for these commodities..
The purchase and use of Conserve™ Plus and Conserve On-Farm is governed by the Control Of Product Supply program in addition to label Directions for Use. Together, these are designed to minimize the risk of double application of spinosad and prevent trade issues which may arise through MRL breaches.
Directions for Use
- Restrict use of the product to treat grain that has been grown on the property where it will be stored.
- Direct that the product is applied no more than once to any consignment of grain.
Control of Product Supply program:
This requires that –
- Agents for Conserve Plus and Conserve On-Farm be trained and accredited to manage the End User Declaration (EUD) process at the point of sale.
- Agents verify growers’ eligibility to purchase through sighting their NGR card number.
- Agents ensure that growers understand the EUD and agree to the conditions of product use before signing the EUD document.
- The grower agrees (as part of the EUD) that, should the treated grain be sold, all records of treatment will be passed on to the purchaser via a CVD.
- Agents will provide the grower with an information pack containing a technical manual and CVDs.
- Dow AgroSciences audit the Agents EUD records for process accuracy.
View the following video: "A Growers Guide to Buying Conserve"
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