Tag Archives: weedy rice

Stay alert

weedy rice

Continue to keep eyes peeled for weedy rice in California fields. • By Vicky Boyd, Editor • The amount of California rice ground infested with weedy rice hovers around 14,000 acres, leading experts to believe that pest control advisers and growers are carefully scouting for the pest. And they hope the diligence continues. “We had three new sites (in 2019), ... Read More »

Washington University researcher nabs $2.6 million grant to study weedy rice

Kenneth Olsen

Many farmers struggle with an enemy that looks like a friend. Agricultural weeds that are close relatives of crops present a particular challenge to farmers because their physical similarities to the desirable species make them difficult to detect and eradicate. Along the way, the imitators compete with crops for water, nutrients and space — often depressing crop yields. More than ... Read More »

UC continues studies into using drones to spot spray weedy rice

fixed-wing drone

• By Whitney Brim-DeForest, Sean Hagan and Luis Espino • For the past several years, California rice has been dealing with a pesky new weed, weedy rice, aka “red” rice. Weedy rice is a difficult pest to manage, because it is the same species as rice (both are Oryza sativa L.), rendering herbicide use next-to-impossible. In the southern U.S. rice-growing ... Read More »

UC hosts free weedy rice workshop, Aug. 1

The University of California Cooperative Extension will host a free weedy rice workshop, from 10 a.m.-noon, Aug. 1, at the Colusa Casino Chairman’s Room in Colusa. Weedy rice, an all-inclusive term for red rice and undesirable outcrossings, was confirmed in about six California rice fields in 2003. By 2016, it had exploded and had been found in about 60 fields ... Read More »

Researchers get to the root of weedy rice’s aggressiveness

weedy rice roots

Weedy rice is neither wild rice nor commercial rice, but instead rice gone rogue that has shed some traits important to people. It also is an incredibly aggressive, potentially detrimental weed that pops up almost everywhere rice is grown, and it can reduce crop yields by more than 80 percent if it invades a field. Researchers from Washington University in ... Read More »

Consider a seed treatment to boost seedling vigor

seedling disease

Early season disease management is becoming increasingly important as Texas rice farmers trend toward planting earlier at lower seeding rates (about 50 percent of Texas rice acreage is planted to hybrids). Clearly, the earlier plantings have a better chance of producing both high-yielding main and ratoon crops. But planting earlier means exposing seed to lower temperatures and possibly wetter soil, ... Read More »

UC seeks California growers’ help with weedy rice survey

weedy rice

The University of California is seeking producers’ and farm managers’ help as they conduct a survey of weedy rice infestation and rice production practices in the state that may affect the weed’s persistence and infestation levels. As you know, weedy rice is a pest problem that can potentially cause significant losses to the state’s rice industry. UC Rice Farm Advisers Luis ... Read More »

Seeing red

new watergrass species

New grass species joins weedy rice as weeds that tested California growers and PCAs in 2018 • By Vicky Boyd, Editor • Although the number of rice acres in California infested with weedy rice — also known as red rice — has remained fairly stable the past few seasons, a new biotype popped up in one field in 2018. Add to ... Read More »

Lessons learned

Provisia Rice

Researchers fine-tuned N, seeding recommendations for Provisia rice during 2018 season. The 2018 season was the first year the Provisia variety, PVL01, was grown commercially. Louisiana grew approximately 10,000 acres of PVL01, and the average yield was about 42-43 barrels per acre statewide (6,804-6,966 pounds per acre; 151-155 bushels per acre). Many growers were satisfied with the Provisia system, and ... Read More »

Clean fields

ross thibodeaux Midland LA

Extremely grassy season put the new Provisia Rice System to the test • By Vicky Boyd, Editor • Growers with resistant weedy rice who planted the first commercial Provisia rice variety in 2018 say the decision was a “no-brainer,” even though they knew it had a slightly lower yield potential. The alternative would have been either suffering significant yield loss due ... Read More »