Engineered cotton uses weed-suppression chemical as nutrient

by Kay Ledbetter, Texas A&M AgriLife

A newly developed fertilizer system will provide nutrition to engineered cotton crops worldwide and a deadly dose to weeds that are increasingly herbicide resistant, according to a Texas A&M AgriLife Research study.

The new system applies phosphite to cotton crops engineered to express a certain gene — a gene that makes cotton able to process the phosphite into nutrition while the same compound suppresses weeds that are unable to use it, researchers said. Continue reading

PPO-resistant Palmer amaranth has been at least two years in the making

in Delta Farm Press

by Larry Steckel, Tennessee Extension Weed Specialist

It is becoming clear we aren’t at the beginning of things with respect to detecting PPO/glyphosate-resistant Palmer amaranth in the Mid-South. It became established two to three years ago.

From greenhouse screens for PPO-resistant Palmer amaranth in Arkansas and Tennessee, we continue to find new fields. Other neighboring states are finding it as well. Folks at the University of Kentucky have confirmed PPO-resistant Palmer amaranth in at least one county in western Kentucky. Continue reading

Texas farmers battle weeds early in season

In Southwest Farm Press

Since glyphosate-resistant water hemp and Palmer amaranth have been discovered in Texas in recent years, an exceptionally wet fall and winter and now spring season is causing concern that the growing season, while off to a good start, is also prime time for an exceptional uptick in weed problems across wide areas of Texas.

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Resistant pigweed slows intercropping progress

From Southeast Farm Press

The practice of intercropping cotton and melons has increased significantly in south Georgia, from about 40 acres in 2010 to several thousand acres this past year. Like with more common cropping systems, a major impediment to further growth has been the management of glyphosate-resistant Palmer amaranth pigweed.

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Fungus May Offer Natural Weed Control

From ARS News

A naturally occurring fungus may prove useful in the fight against Palmer amaranth, an aggressive southern weed that can grow at the rate of two inches a day and outcompete corn, cotton, soybean and other crops for resources, potentially reducing their yields.

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Clean equipment helps stop spread of weeds

From Delta Farm Press

There are plenty of reasons to keep machinery clean — improved performance, longer working life — but here’s one that might not be high on a grower’s radar: stopping the spread of weeds.

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