Seminole Crop E News

Agricultural News for Farmers and Agribusiness in SW Georgia

Potato Leafhoppers in Peanut

Posted by romeethredge on June 26, 2015

Potato leafhoppers, not to be confused with Three cornered alfalfa hoppers. sometimes cause leaf damage in peanuts. They feed on the leaf and cause the V shaped yellowing.  A treatable situation has been reported in our area. They usually start on a field border and go out into the field in an area, so good scouting is needed to spot them.

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Here’s Dr. Mark Abney’s, UGA Extension Entomologist, report about them.

“As I walked through my test plots and a few commercial peanut fields this week I noticed that we are starting to see some potato leafhoppers and very early hopper burn. Also there was some heavy leafhopper pressure in at least one field in southwest GA this week. We need to be observant as we scout fields in the coming weeks. Low level leafhopper infestations are very easily overlooked, and scouting from the truck will almost guarantee that you will not see them until the hopper burn is bad.

Hopper burn will appear as yellowing of the tips of the leaves. This yellowing can be very dramatic when infestations are heavy. It is worth mentioning that hopper burn will not immediately go away once the insects stop feeding. This means you should confirm that potato leafhoppers are still active in a field with hopper burn before making an insecticide application. Scouts should be aware that leafhopper infestations often begin at the edges of fields and spread from there. Be sure not to overlook edges as you walk your fields.Potato leafhopper adult.

There are no validated economic thresholds for potato leafhoppers. The presence of adults and nymphs in the field means that reproduction is happening, and populations are likely to grow. We do not want to be too aggressive with this pest, especially in hot dry conditions where insecticide sprays could trigger secondary pest outbreaks. Nevertheless, we do want to prevent severe hopper burn.”

 See Dr. Abney’s post on 27 May 2015 for more info.

Hopper burn on peanut caused by potato leafhopper.

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