Slow Grow 270
Growth Regulator
For the control of premature sprouting of potato tubers and onion bulbs, and for the control of suckering to tobacco plants as per Directions for Use.
| Slow Grow 270 | |
|---|---|
Product Type |
Growth Regulator |
Active Ingredient |
270g/L Maleic Hydrazide present as Potassium Salt |
Pack Size |
20L, 200L, 1000L |
APVMA Registration # |
33375
Search APVMA number at APVMA PubCRIS. |
Key Features & Benefits
- Has a systemic action.
- Present as potassium salt.
- Spraying will not affect flavour or appearance of these crops.
How to Use - Potatoes
- Timing is important as early spraying may reduce crop yield and late spraying may reduce effectiveness.
- Plants must be actively growing so that sufficient material can be translocated from foliage to tuber, but applying too early will reduce crop.
- Spray one week after blossom fall or two weeks after full bloom. In conditions when good flowering does not occur spray immediately upon the first sign of yellowing of the tops usually 4-6 weeks before harvest.
- Spray in the morning, after most of the dew has dried, towards the evening or spray on cool cloudy days.
- Uniform and complete coverage is nec- essary.
- Apply when temperature is below 30C.
- Best results are obtained when the relative humidity is greater than 85% and no rain or irrigation occurs for a week.
- Do not spray if rain is expected within 24 hours or irrigate within 24 hours of application (96 hours in Tasmania)
- Avoid spraying crops affected by diseases or pests
- Do not treat potatoes which are grown for seed
How to Use - Onions
- Green crops are essential for absorption of the product and translocation to the bulb.
- Avoid use on crops severely diseased.
- Avoid spraying onions too early.
- Apply the spray when 50% of the tops have fallen, but while all the tops are still green.
- When plants have three green leaves or less and all the tops are down it is usually too late for effective control.
- Uniform and complete coverage is necessary.
- The use of this product should be combined with selection of a good storing variety.
Application Guide
| Crop | Mode of Action | Rate | Critical Comments |
|---|---|---|---|
| Tobacco Flue cured | Sucker control | 8L–10L / Ha in 350L – 550L of water | Apply 7-10 days after topping following the application of a contact desuckerant spray.
Spray with fine nozzles at pressure of 300–350 kPa. Wet leaves thoroughly BUT do not drench. Spray top one third of the plant using a tricrop boom sprayer or a hand sprayer. |
| Burley | 10L / Ha in 350L – 550L of water | DO NOT apply until plants have been topped and tip leaves are at least 15cm in length.
Compatible with fatty alcohol sucker control agents, and other agricultural chemicals except copper and zinc based fungicides. | |
| Flue cured and Burley | 8L–10L / Ha in 400L – 500L of water | Spray with fine nozzles at a pressure of 300–350 kPa.
Thoroughly wet leaves on top one third of plant. DO NOT apply until plants have been topped and tip leaves are at least 20cm in length. Apply 10-12 days after application of a contact sucker control agent. | |
| Potatoes | Inhibits sprouting of tubers | 10L / Ha in 500L – 1000L of water.
Use no less than 100L of water / Ha for annual application | Spray one week after blossom fall, or two weeks after full bloom.
In varieties or in conditions when good flowering does not occur, spray immediately upon the first sign of yellowing of the tops, usually 4–6 weeks before the crop is ready for harvest. Timing is important as early spraying may reduce crop yield and late spraying may reduce effectiveness. |
| Onions | Inhibits sprouting of bulbs | 10L / Ha in 500L – 1000L of water.
Use no less than 100L of water / Ha for aerial application | Spray when onion bulbs are fully mature and have 5-6 green leaves and their necks are soft enough for the tops to fall if they have not already done so.
Apply the spray when 50% of the tops have fallen, but while all the tops are still green. Add a surfactant such as Kendeen 20, at 25ml per 100L of prepared spray. |
| Garlic | Inhibits sprouting of bulbs | 10L / Ha in 500L of water | Apply 3 weeks before harvest as plants are just beginning to dry. |
| Always refer to the full registered product label for full usage directions, safety, and environmental instructions. | |||
What is Slow Grow 270 growth regulator and how does it work?
Slow Grow 270 is an APVMA-registered growth regulator containing 270g/L maleic hydrazide (potassium salt), used as a sprout suppressant for potatoes, onions, garlic bulbs, and for sucker control in tobacco. It is absorbed through green foliage and translocated to storage organs, where it prevents unwanted growth and helps maintain crop quality in storage. Always consult the label before use for approved crops and directions.
How do I use Slow Grow 270 sprout suppressant on potatoes?
- Timing: Spray one week after blossom fall or two weeks after full bloom. If flowering is poor, spray at first yellowing of tops—usually 4–6 weeks before harvest.
- Rate: Apply 10L per hectare in 500–1000L water. Boom sprayer preferred.
- Critical Instructions:
- Plants must be actively growing for best sprout suppression.
- Do not treat seed potatoes.
- Avoid spraying wilted, frost-damaged, or diseased crops (e.g., Verticillium wilt, Alternaria, Phytopthora) as efficacy will be reduced.
- For aerial application, use a minimum of 100L water per hectare and spray in early morning or light winds; ideal droplet size ~150 microns.
- Do not mix with insecticides, fungicides, or foliar fertilisers; clean spray tanks before use.
- Compliance: Always consult the label for further restrictions and safety instructions.
How is Slow Grow 270 used for onion sprout control?
- Timing: Spray when onion bulbs are fully mature and have 5–6 green leaves with soft necks. Apply when 50% of tops have fallen but are still green.
- Rate: Apply 10L per hectare in 500–1000L water. Add a non-ionic surfactant such as Kendeen 20 at 25ml per 100L of spray.
- Critical Instructions:
- Do not apply to crops infested with Botrytis or Leaf Blight (Blast), or if there are three or fewer green leaves remaining—all tops must not be completely down.
- Early application may cause bulbs to become spongy or hollow.
- Use with well-storing onion varieties; will not make poor storer varieties adequate for storage.
- Not recommended for onions to be lifted prematurely.
- Some export markets do not accept onions treated with maleic hydrazide. Check before using.
- Compliance: Follow all label safety and export notes.
How do I apply Slow Grow 270 plant growth regulator to garlic bulbs?
Apply 10L per hectare in 500L water three weeks before harvest when garlic plants are just beginning to dry down. Proper timing is essential for effective sprout suppression. Refer to the label for safety and detailed application instructions.
What is the recommended use for Slow Grow 270 on tobacco plants?
- Timing & Rate:
- Flue-cured tobacco: 8–10L/ha in 350–550L water, 7–10 days after topping and after use of a contact desuckerant spray. Use fine nozzles (300–350 kPa); wet the top third of the plant. Do not drench.
- Burley tobacco: 10L/ha in 350–550L water, only after topping and when tip leaves are at least 15cm long. Apply 10–12 days after a contact sucker control agent.
- Critical Instructions:
- Compatible only with fatty alcohol sucker control agents, not with copper/zinc fungicides.
- Do not exceed recommended rates. Over-application can impact crop maturity, leaf quality, and residue levels.
- Carry out spraying in still air conditions, after dew has dried or on cloudy days.
- Will not control suckers present at the time of spraying.
- Observe pre-harvest intervals. Do not use within 7 days of harvest.
- Compliance: Reference the label for withholding, residue, and export notes.
In Australia, are there regional or timing restrictions for Slow Grow 270 sprout suppressant?
Yes. Do not irrigate within 24 hours of application (or within 96 hours in Tasmania). Never spray wilted, frost-damaged, or affected crops, and do not treat crops grown for seed. Always check regional regulations and consult the product label for details.
Is Slow Grow 270 compatible with other sprout suppressants or crop protection products?
It is compatible with fatty alcohol agents for tobacco sucker control, but do not mix with copper or zinc fungicides, insecticides, or foliar fertilisers. Always test tank mixes and follow the compatibility section of the label.
What safety and environmental precautions should I follow when using Slow Grow 270?
Wear protective equipment and avoid skin, eye, or respiratory exposure. Wash thoroughly after use; triple-rinse containers before disposal. Never contaminate streams or waterways. Follow all local environmental safety directions, as the product is hazardous to aquatic life.
What are the approved storage and disposal requirements for Slow Grow 270?
Store in closed, original container in a cool, dry, ventilated area away from sunlight. Triple-rinse containers and recycle or bury according to local regulations. Do not dispose of undiluted product on site.
Are there export market restrictions for crops treated with Slow Grow 270 growth regulator?
Yes. Some export destinations restrict onions or other crops treated with maleic hydrazide. Always confirm export requirements with your market authority before use.
What withholding periods or harvest intervals apply to crops treated with Slow Grow 270?
Do not apply to tobacco within 7 days of harvest. Always respect pre-harvest intervals and use directions per the product label for potatoes, onions, and garlic.
Where can I buy Kendon Slow Grow 270?
You can purchase this product from leading garden centres and agricultural suppliers throughout Australia. If you are a grower and would like a distributor for larger quantities, send us a message on our contact us page requesting "Kendon Slow Grow 270" distributors near you.
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