USA
January 10, 2018

Horizon Ag is excited to partner with BASF to launch Provisia™  rice in 2018. When planted within the recommended rotation, the Provisia rice system and the Clearfield® rice system will work synergistically to control weedy rice long-term. Provisia herbicide applied to Provisia rice will provide excellent control of IMI-resistant grasses and “weedy rice.” PVL01 is the first varietal release in the Provisia rice system. Just like conventional rice, PVL01 is susceptible to Newpath® carryover, so Provisia rice should only follow conventional rice, soybeans or fallow to allow sufficient degradation of Newpath. In some cases, such as fields planted in continuous Clearfield rice for multiple years, depletion could take a minimum of two years. Winter flooding of fields also hinders Newpath breakdown. Tillage and fall/winter exposure to sunlight can expedite the degradation of Newpath.
 

The Clearfield system has been successful for 14 years due to good stewardship. While the Provisia system will allow Clearfield rice to continue to be a viable option for several more years, stewardship practices again must be followed. IMI-resistance issues have increased in the last few years but are concentrated in locales where stewardship has not been followed. For maximum effectiveness of these technologies, rice farmers will need to adhere to proper stewardship. 

Good stewardship includes:

1. Incorporate Provisia rice into your rice-soybean rotation. 
2. Use full rates at recommended application timings of herbicides.
3. Have zero-tolerance for escapes.
4. Do not follow Provisia with Provisia.
5. Do not follow Clearfield with Provisia.
6. Do not follow Clearfield with Clearfield.

Reduce years planted to Clearfield hybrids as they are more likely to seed volunteer IMI-resistant weedy rice.    

Website: http://www.horizonseed.com

Published: January 11, 2018