by clicking the arrows at the side of the page, or by using the toolbar.
by clicking anywhere on the page.
by dragging the page around when zoomed in.
by clicking anywhere on the page when zoomed in.
web sites or send emails by clicking on hyperlinks.
Email this page to a friend
Search this issue
Index - jump to page or section
Archive - view past issues
CRT Catalogue Pull-out Feature : Crop Feature - Winter 2013
www.crt.com.au There’s always better value at CRT. Go to www.crt.com.au to register and receive your next issue via email. Esterifield canola oil The original products in this segment (Hasten and kwickin) were formulated on esterified canola oil. All of the proprietary selective herbicides and fungicides that recommend these adjuvants carried out their trials with canola oil based branded adjuvants. Some years ago the label active constituent description was changed by APVMA to esters of vegetable oil. This has enabled many manufacturers to formulate their adjuvant on a variety of alternatives other than the 'expensive' Australian grown canola oil. From a technical viewpoint, canola oil is the superior oil due to its higher content of unsaturated fatty acids compared to all other alternatives. Examples of the oils that are used in many products are palm oil, cottonseed oil, esterified waste cooking oils and bio-diesel. These alternate oil types sometimes lead to greater crop phytotoxicity and poorer efficacy. Petroleum oil adjuvants Petroleum oil based adjuvants serve a variety of purposes and are not necessarily multifunctional. Oil adjuvants that are applied over crop generally need to be high in paraffinic content and low in aromatic content. Also, the oil carbon chain length can affect efficacy and plant damage potential. There are many sources of petroleum oils including recycled transformer oils. Some cases of extensive crop damage have been reported resulting from the use of an oil adjuvant that does not have the correct oil for the application undertaken. The old saying ‘oils ain’t oils’ is very true. Products such as Uptake, Tribute, D -C -Trate are consistent performers. Soyal phospholipid adjuvants These adjuvants are registered to do a variety of functions. Managing Director of SST, John Illingworth, notes that “the manufacturer is not required to prove these claims when registering generic alternatives. Consequently, generic manufacturers pay no attention to the quality of the oil or surfactant that are the key components of these products.” Only through appropriate trials can one show that the formulation meets its required drift control characteristics and reduction of droplet evaporation rates which is a crucial aspect for obtaining optimum performance with glyphosate sprays. “Also, the use of cheap oil and surfactants often results in a product that separates on storage. This means that the adjuvant will give different results depending on how full the drum was when applied to the spray tank. Companion has the data to substantiate their claims” says John. Products that have been supported in the industry for many years are generally the best choice if the grower is seeking to achieve reliable results. Choice of a generic product may save 5–20 cents per hectare cost, but if yield suffers by more than 1kg per hectare, then your grower has lost money. Crop Protection TechUpdate–Winter2013 With the increasing introduction of generic options in agriculture, the manufacturer’s focus has turned to cost cutting. In the field of adjuvants, which is poorly understood by the regulators, this has allowed some suppliers to compromise product quality such that now a large proportion of adjuvants available bare almost no resemblance to the original proprietary product from which they have adopted the label directions for use. Consequently, the industry is seeing many application failures which can be traced to the use of a lower quality adjuvant. 100% Non-ionic surfactant Where labels recommend the use of a 100% non-ionic surfactant, in most cases the proprietary product from which the generic label was derived had utilised alcohol alkoxylate such as BS1000 for the purpose of developing the directions for use data. BS1000 is a 9 carbon linear fatty alcohol alkoxylate (ethylene oxide and propylene oxide). Today, we see products offered as 100% non-ionic surfactant comprised of: 12 carbon vegetable fatty acid non-ionic ethoxylate (ethylene oxide only) 12 carbon vegetable alcohol alkoxylate (ethylene oxide and propylene oxide) 70–75% nonylphenol ethoxylate (non-biodegradable surfactant) 25–30% butyl diglycol (solvent) 12 carbon synthetic alcohol ethoxylate (ethylene oxide only) 100% alkylphenol ethoxylate (ethylene oxide only) Physical chemistry data indicates that these offerings do not produce the same characteristics as alcohol alkoxylate, which in some cases, are quite inferior. Issues about adjuvant quality Whilst every care is taken in the preparation of the information contained in this Tech Update, it is general information only and has been prepared without taking into account your specific crop requirements. Combined Rural Traders Pty Ltd and its related entities will not, to the extent permitted by law, be liable for any loss, damage, injury, costs or expenses suffered by you or a third party directly or indirectly as a result of your reliance wholly or in part on this information in relation to the choice and use of manufactured products by you, irrespective of whether or not such products are used in accordance with the manufacturer’s instructions or otherwise and whether or not such products are purchased or obtained at the suggestion of Combined Rural Traders Pty Ltd or any of its related entities (including their employees, contractors and agents). What Works CRT INFO ACTIVE
Crop Feature - Autumn 2013
CRT Spring 2013 - Tech Update