Rob Brooks

Rob Brooks

A range and pasture specialist with Bayer Range & Pasture Management will introduce two new herbicides on Thursday at the South Texas Farm & Ranch Show. 

"Both are new chemistry and are really kind of groundbreaking products," said Rob Brooks, who joined Bayer in 2020 after more than 20 years with Dow AgroSciences.

The first Bayer product that Brooks will introduce is Rezilon, a preemergent product can be used on Bahiagrass and Bermudagrass fields for annual grass and broadleaf weed control.

In range and pasture management, herbicides are typically used after weeds have already started to grow on pastures. A preemergent, however, kills weeds before they even start to grow.

Brooks said Bayer has had overwhelming interest in the product, in part because the options for preemergent herbicides are limited.

"There has not been any new preemergent products for the range and pasture businesses for as long as I can remember, and I've been doing this for 25 years," Brooks said. "Guys haven't really had much of a choice except pendimethalin."

Brooks plans to walk session attendees though the basics of the product, usages and best practices. 

He will also introduce Invora during his session, which is primarily used to help restore rangeland by providing long-term control of honey mesquite and huisache.

Bayer has worked for about a decade to bring Invora to market, so some may have seen the herbicide used in demonstrations or test plots, Brooks said.

Compared to other available products, he said the herbicide appears to provide longer control.

"It is going change the way people think about what they should expect out of a brush control product," he said. "We're really excited about it."

Kali Venable is an investigative and environmental reporter for the Victoria Advocate. She can be reached at 361-580-6558 or at

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Investigative & Environmental Reporter

"I am a Houston native and 5th generation Texan, with a degree in journalism and minor in creative writing from the University of Texas at Austin. I care deeply about public interests and the community I serve.”

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