| Active ingredients |
Active Ingredients mepiquat-chloride 305 g/litre; chlorethephon 155g/litre
Chemical Group Tertiary amine and phosphoric acid |
| Physical description |
Physical Description Colourless liquid, amine odour |
| Farm types |
Cropping
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| Uses include |
Plant growth regulator
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| For the control of |
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| Works better with |
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| Also known as |
Also Known As
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| Similar products |
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| Other products that may be used for the same purpose |
Competitor Products TERPAL
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| Timeframe |
How Long Depending on growth conditions, and crop stage at application, visual effects will become obvious from a few days to a week or more after application. These are more obvious from the earlier application timing, and are more easily recognised if a small area is left untreated for comparison.
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| Plant back withholding |
Plant Withholding If all label directions are followed, no with holding period is specified.
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| Stock withholding |
Stock Withholding
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| Barriers to effectiveness |
Barriers Rainfall
Do not apply to wet crops or if frost is expected. Do not apply if rain is expected within 6 hours of treatment. |
| Safety |
.gif) DG (Class 9) |
| Regulatory requirements |
 EPA approval No HSR000806 Registered pursuant to the ACVM Act 1997, No P7071 |
Growth regulator used to shorten and stiffen the straw of cereal crops to improve resistance to lodging
Mainly used in feed barley and cereal silage crops
By stiffening and shortening the straw of these cereal crops, they become less prone to lodging, which is where the crop is either too top heavy from grain yield or after a heavy dew or rain and the stems simply kink and break.
Lodging is one of the most common causes of yield depression in New Zealand. Often lodged crops look as if something has landed in the paddock and flattened out large areas.
Neck break in Barley is also a severe problem which is where the seed head (ear) becomes too top heavy and combined with wind can snap off 2 - 10 cm below the seed head, again causing massive yield loss. Holdup can overcome these problems by shortening, strengthening and stiffening the crop straw.
Application
Can be applied either through ground boom spray units or aerially. Do not apply to crops of low fertility or on crops grown on light soils which would be likely to suffer moisture stress.
Do not apply to crops suffering from physical stress such as frost, hail, water logging, drought or nutrient stress. Do not apply to crops suffering from herbicide damage.
Holdup is taken in through the stems and leaves of growing plants, where it is translocated within the plant. Simply instead of allowing the cells to divide evenly vertically, it changes the cellular structure so the divide horizontally. This causes a shortening and thickening of the stems, resulting in a stronger, shorter and thicker plant stem.
Keep out of reach of children
Store in accordance with NZS 8409 Management of Agrichemicals
Store in original container tightly closed in a locked, dry, cool, well ventilated area away from foodstuffs, fertilizers and seeds
Please refer to the product label for product handling and storage details.
Shelf life
When stored appropriately this product should show no significant degradation for two years from the date of manufacture. Please contact your Ravensdown Account Manager, or the Customer Centre on 0800 100 123, for further information about the use of any product that is older than this.
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When used in mixture always add Holdup to the spray tank last. Use spray solution immediately. Flush equipment thoroughly with clean water following use.
Holdup is compatible with most commonly used fungicides and insecticides. When using Holdup in a tank mix always add the Holdup to the spray tank last and use the spray solution immediately following mixing. Holdup is not recommended to be mixed with herbicides.