3 sorghum herbicide techniques provide grass control

3 sorghum herbicide techniques provide grass control

Sorghum producers have three new herbicide technologies coming into their turf control arsenal: Double Team, igrowth, and Inzen sorghum.

Sorghum screening Agronomy Director Brent Bean recently discussed the advantages and disadvantages of the trio Texas Plant Protection ConferenceBrian. Ben stressed the importance of stewardship of technologies.

“It’s critical,” Bean said. “It’s critical that we do a good job of making sure these technologies last.”

Grass control

Weed control solutions have been on the wish list of sorghum producers for some time. “Now, we don’t have just one, we have three technologies,” he told the crowd.

So, how do they work? How are they different? He made the following observations and recommendations:

  • Know your technology and what the company’s herbicide and seed pairings are.

“You can’t use techniques interchangeably,” Bean said. “You can’t plant Enzine seeds and spray them with FirstAct. It won’t work.”

  • Each technique requires a specific herbicide.

“Both Enzine igroth and sorghum are ALS inhibitors. However, that doesn’t mean they’re the same thing. They’re in different subclasses, so you can’t use them interchangeably. If resistance develops in one of these two technologies, the weed might as well Tolerant to other technology. For this reason, we don’t want to rotate these two technologies in particular.

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“ImiFlex has some activity on broadleaf weeds, but don’t expect it to completely control them. You’ll need help. You might get lucky and get a little broadleaf activity with Zest, but it won’t be much. You guys who planted the corn from Before, you may remember the Accent herbicide. Zest contains the same active ingredient as Accent. The herbicide is great on grass, but has very little broadleaf activity. FirstAct has no activity on broadleaf weeds.

  • All three technologies are sold in bags containing 600,000 seeds. “The entire industry is starting to move in this direction.”

  • Consider rotational restrictions.

“With FirstAct on Double Team sorghum, there’s really nothing to worry about from a crop rotation standpoint.”


Inflex has significant soil residue, “which I’m a little concerned about.” The rotation restriction for corn is eight and a half months, cotton is nine months, and wheat is three to 15 months. “Restricting wheat rotation depends on rainfall or irrigation. The label says there must be at least 10 inches of rain in the field before wheat can be planted three months after application, otherwise wheat cannot be planted until 15 months after application. I have seen wheat that had to be replanted when these guidelines were not followed.

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“Just be aware of some of these limitations, especially if you’re going back immediately to wheat in a double crop situation with ImiFlex.”

“The three companies selling these technologies encourage growers to continue using good pre-emergent herbicides with these technologies. They will not be stand-alone technologies, especially when broadleaf weed control is also needed.”

Hybrid breakdown


Igrowth offers three products (see Table 2). “The last one, G2193G, is one of the more adapted varieties here (Bryan, College Station), and matures a little later. But it also has good tolerance to sugarcane aphid, which is important for this area. G2168IG is very popular and will also work in this area.

G2168IG is 65 days to bloom. Bean says it’s a little shorter than the G2193IG.


Double team

Double Team has four options available. “Three are early to medium-early in maturity. The fourth, SP65B21DT, is a little longer in maturity and is likely to be more adapted to this field. For later plantings, SP30A30DT and SP45A45DT have had a good track record in the high plains over the past two years.”

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Inzen has two hybrids, which are known to be more late maturing. “The one that’s supposed to work best for this area is the second one, the P83Z28. It’s very susceptible to the sugarcane aphid. I talked to agronomists from Pioneer, and they told me that the P85Z65, which is supposed to be more of a plains hybrid, actually works great.” Good here.


Due to the cost, it is recommended that producers who do not have turfgrass problems may want to plant traditional hybrids. “However, if you have grass, your yields will decrease. This is where you will need to use these techniques.”


The cost of using the three technologies will be approximately equal. He says all three work well on most weeds. “I haven’t seen a grass that it doesn’t do well on, except for Texas Panicum, which can be a little questionable.”

Studies show the technology also works well on corn and sorghum.

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