1,4-DMN is a dormancy enhancement chemical that, when applied correctly, helps a potato maintain its natural dormancy. 1,4-DMN can also stop further sprout growth on a potato that has started sprouting prior to an application. Unlike CIPC, 1,4-DMN is reversible and does not prevent normal growth once residue levels have dissipated.
Dormancy enhancement acts like a "pause" button for sprouting in potatoes. 1,4-DMN will stop sprout growth above the applicable residue level. Please consult with your applicator regarding any questions about residues levels.
Generally speaking, application rates will depend on objective, storage temperature, ventilation, length of time left to store, and variety aggressiveness. As a guideline, the maximum applied rate is 20ppm per application and 80ppm per storage season. The rate most typically used in commercial application is 7-10ppm. It is important to consult with your applicator, as rates will vary across North America. Please also consult the product label for further information.
Timing is dependent on several factors, including: your individual storage and when the potatoes are moved into the storage, your goals, your crop, and the storage management program you agreed upon with your applicator. Below are some general guidelines:

♦ 1,4SIGHT®: Typical programs begin 8-10 days after door closure. However, application can be made as soon as the storage reaches a stable temperature.

♦ 1,4SEED®: The United States product label allows for treatment up to 30 days before planting, and the Canadian label allows for treatment up to 60 days before planting.

♦ 1,4SHIP®: In transport vehicles when leaving the packing shed. You should plan for a 24- 48 hour transit period.
1,4SEED® is registered for use on seed potatoes, while 1,4SIGHT® is not.
CIPC is a post-emergence herbicide that disrupts cell division after sprout growth has occurred. CIPC has no activity on the potato until sprout growth commences. 1,4SIGHT® is a dormancy enhancement chemical that helps a potato maintain its natural dormancy.
Testing has shown that no color shifts occur with 1,4SIGHT®. However, any treatment made with a propane fueled application machine can cause color shifts during the application process, especially during late season treatments.
No, 1,4SIGHT® will not cause internal sprouts. It will help eliminate internal sprouting since it stops the growth extension of an active sprout (eye).
Data suggests that 1,4SIGHT® reduces water loss from stored tubers, and thus also reduces pressure bruising.
Residue samples should be taken once a month. These can be sent to our on-site DiChlor Lab for 48 hour results.
Residue samples should be taken once a month. These can be sent to our on-site DiChlor Lab for 48 hour results.
You can send your samples to our on-site DiChlor Laboratory for 48 hour results.
Please monitor your potatoes to ensure that they do not get near 2ppm or below.
In the United States, it has been registered since 1995, and in Canada it was registered in January 2011.
Over 1,000,000 cwt of potatoes have been treated with 1,4-DMN products.