Grasshopper Problems Likely to Get Worse

July 25, 2012 06:16 AM
Grasshopper Problems Likely to Get Worse

By Robert Burns, Texas AgriLife Extension Service

If you’ve got grasshopper problems now, you’re probably going to continue to have them until this fall, said a Texas AgriLife Extension Service entomologist.

Grasshoppers are long-lived; they’re with us most of the summer, and growers are still battling them, said Dr. Allen Knutson, AgriLife Extension entomologist, Dallas.

PestWatchSome producers have already had to re-treat two or three times to protect crops, Knutson said.
And because grasshoppers thrive in hot weather, the problems they pose to crops will likely get worse before they get better, he said.

"As we get into the hot, dry summer, more and more of their wild host plants –- weeds and wild grasses — dry up, and that forces them into our crops, especially irrigated fields," he said.

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High grasshopper populations are tied to drought for a number of reasons, according to Knutson. The first grasshopper hatch was earlier than normal because spring warmed up sooner than normal. And because many areas had a dry winter, a fungus, Entomophthora grylli, that usually causes high grasshopper mortality was not as prevalent in many areas.

He noted that if producers in a particular area didn’t have an early grasshopper population boom, they’re unlikely to see one later in the summer. Though grasshoppers live two months or after they reach the adult stage, they are homebodies, rarely travelling more than a few miles from where they were hatched.


Read more on the current Texas drought.
For More Information
Find more resources and information about controlling pests with AgWeb's 2012 Pest Watch.



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